Employers must ensure employees wears self contained breathing apparatus when?

entering and area when there is a threat to life or health due to reduced oxygen content

one of the most important requirements of any breathing apparatus is?

the face mask pressure be maintained slightly negative

If a person is not sure a piece of equipment is safe to work on he should?

ask a qualified worker to indicate and explain the points of isolation

check with a co worker before proceeding

rely full on the permit information

ensuring the complete isolation of a piece of equipment prior to maintenance is the resposibility?

operating and maintenance dept.

After completing the isolation of equipment,you must?

enter the completed isolation's in the log book

close the equipment outlet valve

in order to protect driven equipment from damage, the 1st step should be to?

place a lock on the drain valve

when isolating a motor for maintenance you should?

install a lockout clamp on the breaker handle

place a do not operate tag on the breaker

The first step to prepare a boiler for an internal and external inspeciton is?

isolate drain and lock out boiler

confined space entry rules apply where the work in progress may cause?

equipment being used to become a hazard

the worker to refuse to perform his job

A confined space may easily become a ?

difficult place in which to maneuver

breeding ground for bio hazardous infectious substances

before entering any confined space, it is good practice to ?

plan the entry using a confined space check lists

verify the operators isolation points throgh the plant safety committee

estimate how long you will be there

inform the plant manager of your whereabouts

which fo the following is not on item that must be conisderd when vessel entry permits are prepared?

has the head of the plant safety dept. being notified

is the required oxygen level measured and assured

is the temp.in the space withing tolerable working limits

is the confined space structurally safe and sound

Portable gas cylinder capacity?

must take into account liquid expansion due to temp. change

is expressed by the tare weight stamped on the cylinder

is a function of the pressure within the unit as ambient temp

may be increased on approval from the DOT

Before disconnecting an empty cylinder from a manifold system?

close the cylinder valve to prevent air entering the cylinder

crack the connecting joint in order to purge it of excess gases

check the areas for gases with an analyzer

The type of information not stamped on the gas cylinder is the ?

date the cylinder was tested for the first time

A gas cylynder hydrostatic test will?

result in a new test date being stamped on the cylinder

subject the cylinder to a pressure equal to its working pressure

subject the cylinder to a pressure of on and one half times

remove any dents the cylinder may contain

The flash point of a liquid is the temp. at which?

all molecular vibration will cease

High Pressure Boilers 2

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| By Deno70

Deno70

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Quizzes Created: 3 | Total Attempts: 14,085

Questions: 50 | Attempts: 661 | Updated: Mar 19, 2023

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Questions and Answers

1.

Employers must ensure employees wears self contained breathing apparatus when?
- A.
  
  Entering any confined spaces
- B.
  
  Handling toxic chemical dusts
- C.
  
  Entering and area when there is a threat to life or health due to reduced oxygen content
- D.
  
  Fighting fires in the plant
Correct Answer
C. Entering and area when there is a threat to life or health due to reduced oxygen content

Explanation
Employees must wear self-contained breathing apparatus when entering an area where there is a threat to life or health due to reduced oxygen content. This is important because reduced oxygen levels can lead to asphyxiation or other serious health risks.

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2.

One of the most important requirements of any breathing apparatus is?
- A.
  
  Proper training prior to use
- B.
  
  The use be clean shaven daily
- C.
  
  That is be self sanitizing
- D.
  
  The face mask pressure be maintained slightly negative
Correct Answer
A. Proper training prior to use

Explanation
Proper training prior to use is one of the most important requirements of any breathing apparatus. This is because using a breathing apparatus without proper training can be dangerous and ineffective. Training ensures that users understand how to properly wear and use the apparatus, as well as how to respond to any emergencies or malfunctions that may occur. It also helps users to develop the necessary skills and knowledge to use the apparatus effectively in different situations. Without proper training, users may not be able to use the breathing apparatus correctly, which can compromise their safety and the effectiveness of the apparatus.

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3.

The filter type resperation with the proper color code will effectiviley protect against?
- A.
  
  Low oxygen concentrations
- B.
  
  Chemical fumes
- C.
  
  Mineral dusts
- D.
  
  Harmful gases
Correct Answer
C. Mineral dusts

Explanation
The filter type respiration with the proper color code will effectively protect against mineral dusts. This means that the filter is designed to trap and prevent the inhalation of small particles of minerals, such as dust from construction sites or mining operations. This type of filter is specifically designed to provide a barrier against these particles and ensure that they do not enter the respiratory system, protecting the individual from potential health hazards associated with mineral dust inhalation.

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4.

Hard hat suspension minimum clearance is
- A.
  
  1 in
- B.
  
  0.74 in
- C.
  
  0.50 in
- D.
  
  1.27 in.
Correct Answer
A. 1 in

Explanation
The correct answer is 1 in. This means that the minimum clearance required for a hard hat suspension is 1 inch. This clearance is necessary to ensure that the hard hat is able to effectively protect the wearer's head from any potential impact or falling objects. Anything less than 1 inch may compromise the safety and effectiveness of the hard hat.

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5.

The pressure in a fully charged self contained breathing apparatus is?
- A.
  
  4.5 psi
- B.
  
  15 psi
- C.
  
  4500 psi
- D.
  
  2250 psi
Correct Answer
C. 4500 psi

Explanation
The pressure in a fully charged self-contained breathing apparatus is 4500 psi. This high pressure is necessary to provide enough air for the user to breathe while they are in a hazardous environment. The high pressure ensures that there is enough air to last for an extended period of time and allows the user to safely navigate through the hazardous area.

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6.

The proper eye protection when working with chemicals or acids is a?
- A.
  
  Face shield
- B.
  
  Monogoggle
- C.
  
  Safety goggle
- D.
  
  Safety glasses
Correct Answer
A. Face shield

Explanation
When working with chemicals or acids, it is important to have proper eye protection to prevent any potential damage or injury. Safety glasses and goggles provide a certain level of protection, but they may not fully cover the entire face. On the other hand, a face shield offers complete coverage and acts as a barrier between the eyes and any hazardous substances. It provides additional protection by covering not only the eyes but also the entire face, including the nose and mouth. Therefore, a face shield is the most suitable choice for eye protection when working with chemicals or acids.

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7.

If a person is not sure a piece of equipment is safe to work on he should?
- A.
  
  Ask the foreman if is safe
- B.
  
  Ask a qualified worker to indicate and explain the points of isolation
- C.
  
  Check with a co worker before proceeding
- D.
  
  Rely full on the permit information
Correct Answer
B. Ask a qualified worker to indicate and explain the points of isolation

Explanation
When a person is unsure about the safety of a piece of equipment, the best course of action is to ask a qualified worker to indicate and explain the points of isolation. This is important because a qualified worker will have the knowledge and expertise to identify potential hazards and ensure that the necessary safety measures, such as isolation procedures, are in place. By seeking guidance from a qualified worker, the person can ensure that they have accurate information and can proceed with the work safely.

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8.

Ensuring the complete isolation of a piece of equipment prior to maintenance is the resposibility?
- A.
  
  Plant safety committee
- B.
  
  Operations dept.
- C.
  
  Operating and maintenance dept.
- D.
  
  Maintenance dept.
Correct Answer
C. Operating and maintenance dept.

Explanation
The responsibility of ensuring the complete isolation of a piece of equipment prior to maintenance lies with the operating and maintenance department. This department is responsible for both the operation and maintenance of the equipment, and it is crucial for them to ensure the equipment is isolated to prevent any accidents or injuries during maintenance procedures. The plant safety committee may have a role in overall safety protocols, but the specific task of isolating equipment falls under the operating and maintenance department's jurisdiction.

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9.

After completing the isolation of equipment,you must?
- A.
  
  Open the equipment drain valve
- B.
  
  Close the equipment outlet valve
- C.
  
  Notify the foreman
- D.
  
  Enter the completed isolation's in the log book
Correct Answer
D. Enter the completed isolation's in the log book

Explanation
After completing the isolation of equipment, it is important to enter the completed isolation's in the log book. This is necessary to document and record the isolation process for future reference and to ensure that all necessary steps have been taken to isolate the equipment properly. The log book serves as a record of the isolation and helps in maintaining a clear and organized record of the equipment's status and maintenance activities. It also helps in communication and coordination among different personnel involved in the process.

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10.

In order to protect driven equipment from damage, the 1st step should be to?
- A.
  
  Close the discharge valve
- B.
  
  Place a lock on the drain valve
- C.
  
  Isolate the driver
- D.
  
  Remove the belts
Correct Answer
C. Isolate the driver

Explanation
To protect driven equipment from damage, the first step should be to isolate the driver. This means disconnecting the power source or shutting down the machine that is driving the equipment. By doing so, the driven equipment will no longer receive power or be in motion, reducing the risk of damage or accidents. Closing the discharge valve or placing a lock on the drain valve may be necessary steps depending on the situation, but isolating the driver is the most important initial action to take. Removing the belts may also be necessary, but it is not the first step to protect the equipment.

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11.

When isolating a motor for maintenance you should?
- A.
  
  Remove the fuses
- B.
  
  Install a lockout clamp on the breaker handle
- C.
  
  Place a do not operate tag on the breaker
- D.
  
  Do all of the above
Correct Answer
D. Do all of the above

Explanation
When isolating a motor for maintenance, it is important to take multiple safety precautions. Removing the fuses ensures that there is no electrical power going to the motor. Installing a lockout clamp on the breaker handle prevents anyone from accidentally turning the power back on. Placing a "do not operate" tag on the breaker serves as a visual reminder to others that maintenance is being performed and the motor should not be operated. Doing all of these steps together ensures maximum safety during maintenance.

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12.

The first step to prepare a boiler for an internal and external inspeciton is?
- A.
  
  Isolate drain and lock out boiler
- B.
  
  Ventilate en-closer spaces
- C.
  
  Notify boiler inspector
- D.
  
  Cool down boiler for entry
Correct Answer
A. Isolate drain and lock out boiler

Explanation
To prepare a boiler for an internal and external inspection, the first step is to isolate the drain and lock out the boiler. This is important to ensure the safety of the inspector and prevent any accidents or injuries. By isolating the drain, any remaining water or steam in the boiler can be safely drained out before the inspection. Locking out the boiler ensures that it cannot be operated while the inspection is taking place, minimizing the risk of any potential hazards. Ventilating the enclosure spaces and notifying the boiler inspector are also important steps in the preparation process, but they are not the first step.

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13.

Confined space entry rules apply where the work in progress may cause?
- A.
  
  Too much noise to withstand
- B.
  
  Equipment being used to become a hazard
- C.
  
  The worker to refuse to perform his job
- D.
  
  An accident
Correct Answer
B. Equipment being used to become a hazard

Explanation
The confined space entry rules apply where the work in progress may cause the equipment being used to become a hazard. This means that in certain confined spaces, the work being done can potentially make the equipment being used dangerous or unsafe. Therefore, it is necessary to follow specific rules and guidelines to ensure the safety of workers and prevent accidents.

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14.

A confined space may easily become a ?
- A.
  
  Difficult place in which to maneuver
- B.
  
  Breeding ground for bio hazardous infectious substances
- C.
  
  Life threatening environment
- D.
  
  Healthy environment
Correct Answer
C. Life threatening environment

Explanation
A confined space refers to an area with limited access and restricted movement. Such spaces often lack proper ventilation and can pose various hazards, including the risk of suffocation, exposure to toxic gases, or the potential for fires or explosions. These factors make a confined space a life-threatening environment, as individuals may face serious injuries or even death if proper precautions are not taken.

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15.

Before entering any confined space, it is good practice to ?
- A.
  
  Verify the operators isolation points throgh the plant safety committee
- B.
  
  Estimate how long you will be there
- C.
  
  Inform the plant manager of your whereabouts
- D.
  
  Plan the entry using a confined space check lists
Correct Answer
D. Plan the entry using a confined space check lists

Explanation
Before entering any confined space, it is good practice to plan the entry using a confined space checklist. This checklist helps ensure that all necessary precautions and safety measures are taken before entering the confined space. It helps identify potential hazards, assess the risks involved, and determine the necessary equipment and procedures for a safe entry. By following a confined space checklist, workers can effectively plan and prepare for the entry, minimizing the risks and ensuring their safety inside the confined space.

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16.

An employer is required to identify any confined space?
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
An employer is required to identify any confined space because it is necessary to ensure the safety and well-being of employees. Confined spaces can pose various risks such as limited entry and exit points, poor ventilation, and potential for hazardous substances or conditions. Identifying these spaces allows the employer to implement appropriate safety measures, such as providing proper training, equipment, and emergency procedures, to prevent accidents and protect the workers.

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17.

Which fo the following is not on item that must be conisderd when vessel entry permits are prepared?
- A.
  
  Is the required oxygen level measured and assured
- B.
  
  Is the temp.in the space withing tolerable working limits
- C.
  
  Is the confined space structurally safe and sound
- D.
  
  Has the head of the plant safety dept. being notified
Correct Answer
D. Has the head of the plant safety dept. being notified

Explanation
The question asks about an item that must not be considered when preparing vessel entry permits. The correct answer is "has the head of the plant safety dept. being notified." This is because notifying the head of the plant safety department is an important step in ensuring safety and compliance, and it should be considered when preparing vessel entry permits. Therefore, this option is the one that does not belong in the list of items to consider.

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18.

Portable gas cylinder capacity?
- A.
  
  Is expressed by the tare weight stamped on the cylinder
- B.
  
  Must take into account liquid expansion due to temp. change
- C.
  
  Is a function of the pressure within the unit as ambient temp
- D.
  
  May be increased on approval from the DOT
Correct Answer
B. Must take into account liquid expansion due to temp. change

Explanation
The correct answer is that the portable gas cylinder capacity must take into account liquid expansion due to temperature change. This means that the capacity of the cylinder can change as the temperature of the gas inside fluctuates. As the temperature increases, the gas expands and takes up more space, thereby increasing the capacity of the cylinder. Conversely, as the temperature decreases, the gas contracts and takes up less space, reducing the capacity of the cylinder. It is important to consider this expansion and contraction when determining the actual capacity of the gas cylinder.

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19.

Gas cylinder valves are normally constructed of?
- A.
  
  Steel
- B.
  
  Poly carbonate
- C.
  
  Brass
- D.
  
  Lead
Correct Answer
C. Brass

Explanation
Gas cylinder valves are normally constructed of brass because brass is a durable and corrosion-resistant material. It can withstand the high pressures and extreme temperatures associated with gas cylinders. Brass also has good sealing properties, ensuring a tight seal between the valve and the cylinder to prevent gas leaks. Additionally, brass is malleable, making it easier to manufacture and shape into the necessary valve components.

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20.

Before disconnecting an empty cylinder from a manifold system?
- A.
  
  Crack the connecting joint in order to purge it of excess gases
- B.
  
  Check the areas for gases with an analyzer
- C.
  
  Unchain the cylinder
- D.
  
  Close the cylinder valve to prevent air entering the cylinder
Correct Answer
D. Close the cylinder valve to prevent air entering the cylinder

Explanation
Closing the cylinder valve before disconnecting an empty cylinder from a manifold system is necessary to prevent air from entering the cylinder. This is important because introducing air into the cylinder can contaminate the gas inside and affect its purity. By closing the cylinder valve, any potential air ingress is blocked, ensuring the integrity of the gas inside the cylinder is maintained.

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21.

As applied to bottled gases vapor pressure is defined as the pressure of the vapor above a liquid inside the cylinder when the temp. is at?
- A.
  
  212 deg f
- B.
  
  122 deg f
- C.
  
  77 deg f
- D.
  
  200 deg f
Correct Answer
D. 200 deg f

Explanation
Vapor pressure is the pressure exerted by the vapor phase of a substance when it is in equilibrium with its liquid phase. As the temperature increases, the vapor pressure of a liquid also increases. Therefore, at a higher temperature of 200 degrees Fahrenheit, the vapor pressure of the bottled gas would be higher compared to the other given temperatures.

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22.

The type of information not stamped on the gas cylinder is the ?
- A.
  
  Manufacturers symbol
- B.
  
  Date the cylinder was tested for the first time
- C.
  
  Ownership symbol
- D.
  
  Date the cylinder was changed
Correct Answer
D. Date the cylinder was changed

Explanation
The type of information not stamped on the gas cylinder is the date the cylinder was changed. This information is not typically stamped on the cylinder as it is not necessary for the safe use and handling of the cylinder. The manufacturers symbol, date the cylinder was tested for the first time, and ownership symbol are usually stamped on the cylinder to provide important information about its origin and safety standards.

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23.

A gas cylynder hydrostatic test will?
- A.
  
  Result in a new test date being stamped on the cylinder
- B.
  
  Subject the cylinder to a pressure equal to its working pressure
- C.
  
  Subject the cylinder to a pressure of on and one half times
- D.
  
  Remove any dents the cylinder may contain
Correct Answer
A. Result in a new test date being stamped on the cylinder

Explanation
A gas cylinder hydrostatic test is conducted to ensure the cylinder's structural integrity and safety. During the test, the cylinder is filled with water and pressurized to a level higher than its working pressure. This test helps to identify any weaknesses or defects in the cylinder that could lead to failure. If the cylinder passes the test, a new test date is stamped on it, indicating that it is safe to use until that date. This ensures that cylinders are regularly inspected and tested to maintain their safety standards.

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24.

If the fuel percentage is below the lower flammable limit the mixture is said to be?
- A.
  
  Rich
- B.
  
  Lean
- C.
  
  Invisible
- D.
  
  At the auto lighten temp.
Correct Answer
B. Lean

Explanation
When the fuel percentage is below the lower flammable limit, the mixture is said to be "lean." A lean mixture refers to a fuel-air mixture that contains a higher proportion of air compared to fuel. In this case, there is not enough fuel present to support combustion efficiently. This can result in a weak or incomplete burn, leading to decreased power output and potentially causing engine misfires or other performance issues.

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25.

The flash point of a liquid is the temp. at which?
- A.
  
  All molecular vibration will cease
- B.
  
  It will from a gas and burn
- C.
  
  The liquid will burn
- D.
  
  The vapors become inert
Correct Answer
B. It will from a gas and burn

Explanation
The flash point of a liquid refers to the temperature at which it will form a gas and ignite when exposed to an open flame or spark. This means that the liquid reaches a temperature at which it can vaporize and mix with air to form a flammable mixture that can burn. Therefore, the correct answer is "it will form a gas and burn."

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26.

Washing steam should enter a tank car or tank truck slowly so as to?
- A.
  
  Prevent injury to the worker
- B.
  
  Prevent massive condensation of the steam with the tank
- C.
  
  Flush the tank gradually
- D.
  
  Reduce the risk of static electricity spark
Correct Answer
D. Reduce the risk of static electricity spark

Explanation
Washing steam should enter a tank car or tank truck slowly in order to reduce the risk of a static electricity spark. When steam enters rapidly, it can create static electricity, which can potentially cause a spark and ignite flammable substances present in the tank. By entering slowly, the risk of static electricity buildup and subsequent spark is minimized, reducing the potential for accidents or explosions.

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27.

The explosion of a flammable mixture that occured at the exact time a valve was opened was likely due to the ?
- A.
  
  Pyrophoric effect
- B.
  
  Static electric charge build up
- C.
  
  Catalytic effect of the fresh metallic surface
- D.
  
  Temp. of the mixture
Correct Answer
C. Catalytic effect of the fresh metallic surface

Explanation
The explosion was likely due to the catalytic effect of the fresh metallic surface. When a valve was opened, the fresh metallic surface could have acted as a catalyst, promoting the reaction between the flammable mixture and the surrounding air. This catalytic effect would have accelerated the reaction, leading to the explosion.

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28.

The ignition temp. fo fuel and air mixture is the ?
- A.
  
  Lowest temp. at which a mixture will burn
- B.
  
  Temp. at which it is said to have a lean mixture
- C.
  
  Temp. at which the fuel may gel
- D.
  
  Temp. at which the mixture is above the boiling temp.
Correct Answer
A. Lowest temp. at which a mixture will burn

Explanation
The ignition temperature of a fuel and air mixture refers to the lowest temperature at which the mixture will burn. This means that once the temperature reaches the ignition temperature, the fuel and air mixture will undergo combustion and sustain a fire.

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29.

Before starting up a hot water boiler, the following must be ensured?
- A.
  
  The circulator pump is off
- B.
  
  The boiler has a valid inspection certificate
- C.
  
  The low water fuel cutoff is in the tripped position
- D.
  
  The boiler control is in the on position
Correct Answer
B. The boiler has a valid inspection certificate

Explanation
Before starting up a hot water boiler, it is crucial to ensure that the boiler has a valid inspection certificate. This certificate ensures that the boiler has been inspected and meets the necessary safety standards. It signifies that the boiler is in proper working condition and has been approved for operation. Without a valid inspection certificate, there may be potential safety hazards or issues with the boiler that could pose risks to individuals or property. Therefore, it is essential to have a valid inspection certificate before starting up a hot water boiler.

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30.

The pressure relief valve on a hot water heating boiler should be set at?
- A.
  
  25% lower than operating pressure
- B.
  
  10% lower than operating pressure
- C.
  
  25% above operating pressure
- D.
  
  20% lower than operating pressure
Correct Answer
C. 25% above operating pressure

Explanation
The pressure relief valve on a hot water heating boiler should be set at 25% above the operating pressure to ensure that the pressure is released before it reaches dangerous levels. This allows for a safety margin and helps prevent the boiler from becoming overpressurized, which could lead to a potential explosion or damage to the system.

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31.

During the warm up period of a heating boiler the main burner goes out the operator should?
- A.
  
  Shut down the boiler immediately purge and restart it
- B.
  
  Shut down the boiler close the fuel valves and determine the cause of the problem
- C.
  
  Try to re light the burner immediately
- D.
  
  Check the altitude gage to ensure there is enough water in the system
Correct Answer
B. Shut down the boiler close the fuel valves and determine the cause of the problem

Explanation
If the main burner goes out during the warm-up period of a heating boiler, it is important to shut down the boiler immediately to prevent any further damage or safety hazards. Closing the fuel valves is necessary to stop the supply of fuel to the burner. After shutting down the boiler and closing the fuel valves, the operator should then determine the cause of the problem to address and fix it before attempting to restart the boiler. This ensures that any underlying issues are resolved and prevents the problem from recurring. Checking the altitude gauge to ensure there is enough water in the system is not relevant to addressing the issue of the main burner going out.

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32.

The maximum operating temp. in a hot water heating boiler should never exceed __________%
- A.
  
  203
- B.
  
  250
- C.
  
  302
- D.
  
  334.4
Correct Answer
B. 250

Explanation
The maximum operating temperature in a hot water heating boiler should never exceed 250%. This is because exceeding this temperature can lead to overheating and potential damage to the boiler system. It is important to maintain a safe operating temperature to ensure the longevity and efficiency of the boiler.

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33.

The minimum temp. at which a hot water heating boiler shoud be operated to prevent flue gas condenstation is ___ deg f.
- A.
  
  149
- B.
  
  203
- C.
  
  170.6
- D.
  
  190
Correct Answer
C. 170.6

Explanation
The minimum temperature at which a hot water heating boiler should be operated to prevent flue gas condensation is 170.6 degrees Fahrenheit. Flue gas condensation occurs when the temperature of the flue gas drops below its dew point, causing water vapor to condense and potentially damage the boiler. By operating the boiler at a minimum temperature of 170.6 degrees Fahrenheit, the flue gas temperature is kept above the dew point, preventing condensation and potential damage.

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34.

The external inspection of a boiler includes making sure the?
- A.
  
  Valves are in good operating condition
- B.
  
  Furnace refractory is in order
- C.
  
  Tubes are free of scale
- D.
  
  Exterior of the tubes are in good condition
Correct Answer
A. Valves are in good operating condition

Explanation
The external inspection of a boiler includes checking the valves to ensure they are in good operating condition. This is important because valves control the flow of steam and water within the boiler system. If the valves are not functioning properly, it can lead to issues such as leaks, pressure build-up, or inadequate control of steam flow. Therefore, it is necessary to inspect the valves during the external inspection to ensure they are in good working order and prevent any potential problems.

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35.

If a new boiler is not properly boiled out it may result in ?
- A.
  
  Tubes rupturing
- B.
  
  A furnace explosion
- C.
  
  An unwanted high rate of water circulation
- D.
  
  A foaming condition occuring
Correct Answer
D. A foaming condition occuring

Explanation
If a new boiler is not properly boiled out, it may result in a foaming condition occurring. This is because during the boiling out process, any impurities or contaminants in the boiler are removed. If this process is not done correctly, these impurities can cause foaming in the boiler water, leading to various issues such as reduced heat transfer, water level fluctuations, and potential damage to the boiler system.

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36.

Superheater vents are usually opened before firing a boiler to ?
- A.
  
  Allow the super heater to warm up quickly
- B.
  
  Prevent overheating of the super heater
- C.
  
  Ensure drum level does not drop
- D.
  
  Enhance boiler water circulation
Correct Answer
B. Prevent overheating of the super heater

Explanation
The reason why superheater vents are usually opened before firing a boiler is to prevent overheating of the superheater. By opening the vents, any trapped air or steam in the superheater can escape, allowing for proper circulation and preventing the superheater from becoming too hot. This helps to maintain the integrity of the superheater and avoid any potential damage or failure due to excessive heat.

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37.

If 3 boilers each have a presure of 18.85 psi the pressure in the steam header will be?
- A.
  
  20.30 psi
- B.
  
  21.03 psi
- C.
  
  19.58 psi
- D.
  
  18.85 psi
Correct Answer
D. 18.85 psi

Explanation
The pressure in the steam header will be the same as the pressure in each of the boilers, which is 18.85 psi. This is because the steam header is connected to the boilers and the pressure will equalize throughout the system. Therefore, the correct answer is 18.85 psi.

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38.

When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to prevent what from occuring?
- A.
  
  An over pressure condition
- B.
  
  A vacuum
- C.
  
  Too much condensing of the steam
- D.
  
  Loss of visible level in the sightglass
Correct Answer
B. A vacuum

Explanation
When a steam boiler is taken out of service and allowed to cool down, opening the vent valve on the steam drum prevents a vacuum from occurring. As the steam cools and condenses, it creates a negative pressure inside the boiler. This negative pressure can cause the boiler to collapse or implode, leading to potential damage and hazards. By opening the vent valve, the negative pressure is relieved, preventing the occurrence of a vacuum and ensuring the boiler remains safe during the cooling process.

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39.

Boiling out boilers is done with a _________solution?
- A.
  
  Acidic
- B.
  
  Neutral ph
- C.
  
  Liquid
- D.
  
  Alkaline
Correct Answer
D. Alkaline

Explanation
Boiling out boilers is done with an alkaline solution because alkaline solutions are effective in removing scale and deposits that accumulate inside boilers. Alkaline solutions have high pH levels, which helps to dissolve and break down the deposits, making it easier to clean the boilers. Acidic solutions, on the other hand, can cause corrosion and damage to the boiler, while neutral pH or liquid solutions may not have the necessary cleaning properties to effectively remove the deposits.

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40.

On small boilers a hydrostatic test is done with?
- A.
  
  Compressed oxygen
- B.
  
  Water pressure
- C.
  
  Steam pressure
- D.
  
  Compressed air
Correct Answer
B. Water pressure

Explanation
A hydrostatic test is a method used to check the structural integrity and strength of a pressure vessel, such as a boiler. It involves filling the vessel with a liquid, usually water, and pressurizing it to a specific level. This test is typically done with water pressure because water is readily available, inexpensive, and non-reactive. Using compressed oxygen or steam pressure could be dangerous and potentially cause explosions. Compressed air may not provide sufficient pressure for an accurate test.

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41.

Internal boiler cleaning is usually preceded by?
- A.
  
  A hydro static test
- B.
  
  An internal inspection
- C.
  
  An external inspection
- D.
  
  An overhaul
Correct Answer
B. An internal inspection

Explanation
Internal boiler cleaning is usually preceded by an internal inspection. This is because before cleaning the boiler, it is important to assess the condition of the internal components, such as tubes, pipes, and chambers, to determine the extent of the cleaning required. An internal inspection helps identify any build-up of deposits, corrosion, or other issues that may affect the boiler's performance. Once the inspection is done, appropriate cleaning methods can be employed to remove the accumulated deposits and ensure the boiler operates efficiently.

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42.

When performing an internal inspection of a boiler examin the waterside through all the handhole doors for?
- A.
  
  Tube pitting
- B.
  
  Carbon deposits
- C.
  
  Moisture
- D.
  
  Small salt traces
Correct Answer
A. Tube pitting

Explanation
During an internal inspection of a boiler, it is important to examine the waterside through all the handhole doors to check for tube pitting. Tube pitting refers to the corrosion or erosion of the tubes inside the boiler. This can lead to leaks or failures in the system, compromising its efficiency and safety. By inspecting the waterside, any signs of tube pitting can be identified and appropriate actions can be taken to prevent further damage or accidents.

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43.

In order for the gage glass to show the correct level all connections to the gage glass and the water column must be _____ to ensure they are clear and free of obstrucitons?
- A.
  
  Tight
- B.
  
  Purged
- C.
  
  Blown down
- D.
  
  Unblocked
Correct Answer
C. Blown down

Explanation
In order for the gage glass to accurately display the water level, it is necessary to remove any obstructions or debris that may be present in the connections to the gage glass and water column. This process is called "blowing down" and ensures that the connections are clear and free of any blockages that could interfere with the accurate measurement of the water level.

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1
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44.

When plugging off a tube in a boiler the plug taper should be?
- A.
  
  10 to 1
- B.
  
  20 to 1
- C.
  
  15 to 2
Correct Answer
B. 20 to 1

Explanation
The correct answer is 20 to 1. The plug taper in a boiler should be 20 to 1, meaning that the diameter of the plug should decrease by a factor of 20 for every inch of length. This taper ensures a tight seal when the plug is inserted into the tube, preventing any leakage of steam or water. A steep taper like 20 to 1 is necessary to withstand the high pressure and temperature conditions inside the boiler.

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45.

Who should be responsible for doing frequent boiler inspections?
- A.
  
  Boiler operator
- B.
  
  Inspector
- C.
  
  Boss
- D.
  
  Contractor
Correct Answer
A. Boiler operator

Explanation
The correct answer is boiler operator. Boiler operators are responsible for the day-to-day operation and maintenance of boilers. They are trained to monitor and inspect boilers regularly to ensure they are functioning safely and efficiently. Inspectors may conduct periodic inspections, but it is the boiler operator's responsibility to perform frequent inspections to identify any potential issues and take appropriate actions. The boss and contractor may have supervisory roles, but the primary responsibility lies with the boiler operator.

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46.

A steam heating boiler to be sht down for 6 months during the summer should be?
- A.
  
  Drained, thoroughly dried out quick lime placed inside and left open
- B.
  
  Drained,thorughly dried out quick lime placed inside and closed up
- C.
  
  Left with the water at normal working level but open to atmoshere
- D.
  
  Left with water at normal working level and pressurized
Correct Answer
B. Drained,thorughly dried out quick lime placed inside and closed up

Explanation
During the summer, when the steam heating boiler is not in use, it is recommended to drain the boiler to remove any remaining water. This prevents the water from causing corrosion or damage to the boiler during the idle period. Additionally, thoroughly drying out the boiler ensures that there is no moisture left inside, which could also lead to corrosion. Placing quick lime inside the boiler helps absorb any remaining moisture and further prevents corrosion. Finally, closing up the boiler ensures that no external moisture or contaminants enter the boiler during the shutdown period.

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47.

The final step in replacing a firetube is?
- A.
  
  Closing up the boiler
- B.
  
  Ensuring all tools and debris have been removed from the boiler
- C.
  
  Conducting a hydro-static test
- D.
  
  Informing the boiler inspector the tube replacement is complete
Correct Answer
C. Conducting a hydro-static test

Explanation
The final step in replacing a firetube is conducting a hydro-static test. This test is performed to ensure that the newly replaced firetube is properly sealed and can withstand the pressure of the boiler. By filling the boiler with water and pressurizing it, any leaks or weaknesses in the firetube can be identified. This step is crucial to ensure the safety and efficiency of the boiler system before it is put back into operation.

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48.

Who is qualified to do a weld repair on boilers and pressure vessels?
- A.
  
  Shift engineer
- B.
  
  Millwright
- C.
  
  Pressure welder
- D.
  
  Pipe fitter
Correct Answer
C. Pressure welder

Explanation
A pressure welder is qualified to do a weld repair on boilers and pressure vessels because they have the necessary skills and knowledge to perform welding work on these specific structures. Welding on boilers and pressure vessels requires expertise in dealing with high temperatures and pressures, as well as knowledge of specific welding techniques and safety protocols. A pressure welder would have received the appropriate training and certification to ensure they can safely and effectively carry out weld repairs on boilers and pressure vessels.

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49.

State the name of the device that is used to detect fine cracks when used in combinaitno with a flourescent penetrant?
- A.
  
  Black-light
- B.
  
  Bulb
- C.
  
  Neon bulb
- D.
  
  Flashlight
Correct Answer
A. Black-light

Explanation
A black-light is a device that emits ultraviolet (UV) light, which is used to detect fine cracks when used in combination with a fluorescent penetrant. When the fluorescent penetrant is applied to the surface being inspected, it seeps into any cracks or defects. When the black-light is then shone onto the surface, the UV light causes the penetrant to emit a visible fluorescent glow, making any cracks or defects easily visible to the inspector. Therefore, a black-light is the device used to detect fine cracks when combined with a fluorescent penetrant.

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50.

Just before entering the waterside of the boiler it is important to?
- A.
  
  Notify the inspector in writing of your intent
- B.
  
  Ensure the chief engineer is aware of your intent
- C.
  
  Be wearing self contained breathing apparatus
- D.
  
  Test the atmosphere
Correct Answer
D. Test the atmosphere

Explanation
Before entering the waterside of the boiler, it is important to test the atmosphere. This is necessary to ensure that the air inside the boiler is safe to breathe and does not contain any harmful gases or substances. Testing the atmosphere helps to prevent potential hazards and ensures the safety of the person entering the boiler.

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Quiz Review Timeline +

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Current Version
Mar 19, 2023

Quiz Edited by
ProProfs Editorial Team
Feb 15, 2012

Quiz Created by
Deno70

High Pressure Boilers 2

Employers must ensure employees wears self contained breathing apparatus when?

One of the most important requirements of any breathing apparatus is?

The filter type resperation with the proper color code will effectiviley protect against?

Hard hat suspension minimum clearance is

The pressure in a fully charged self contained breathing apparatus is?

The proper eye protection when working with chemicals or acids is a?

If a person is not sure a piece of equipment is safe to work on he should?

Ensuring the complete isolation of a piece of equipment prior to maintenance is the resposibility?

After completing the isolation of equipment,you must?

In order to protect driven equipment from damage, the 1st step should be to?

When isolating a motor for maintenance you should?

The first step to prepare a boiler for an internal and external inspeciton is?

Confined space entry rules apply where the work in progress may cause?

A confined space may easily become a ?

Before entering any confined space, it is good practice to ?

An employer is required to identify any confined space?

Which fo the following is not on item that must be conisderd when vessel entry permits are prepared?

Portable gas cylinder capacity?

Gas cylinder valves are normally constructed of?

Before disconnecting an empty cylinder from a manifold system?

As applied to bottled gases vapor pressure is defined as the pressure of the vapor above a liquid inside the cylinder when the temp. is at?

The type of information not stamped on the gas cylinder is the ?

A gas cylynder hydrostatic test will?

If the fuel percentage is below the lower flammable limit the mixture is said to be?

The flash point of a liquid is the temp. at which?

Washing steam should enter a tank car or tank truck slowly so as to?

The explosion of a flammable mixture that occured at the exact time a valve was opened was likely due to the ?

The ignition temp. fo fuel and air mixture is the ?

Before starting up a hot water boiler, the following must be ensured?

The pressure relief valve on a hot water heating boiler should be set at?

During the warm up period of a heating boiler the main burner goes out the operator should?

The maximum operating temp. in a hot water heating boiler should never exceed __________%

The minimum temp. at which a hot water heating boiler shoud be operated to prevent flue gas condenstation is ___ deg f.

The external inspection of a boiler includes making sure the?

If a new boiler is not properly boiled out it may result in ?

Superheater vents are usually opened before firing a boiler to ?

If 3 boilers each have a presure of 18.85 psi the pressure in the steam header will be?

When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to prevent what from occuring?

Boiling out boilers is done with a _________solution?

On small boilers a hydrostatic test is done with?

Internal boiler cleaning is usually preceded by?

When performing an internal inspection of a boiler examin the waterside through all the handhole doors for?

In order for the gage glass to show the correct level all connections to the gage glass and the water column must be _____ to ensure they are clear and free of obstrucitons?

When plugging off a tube in a boiler the plug taper should be?

Who should be responsible for doing frequent boiler inspections?

A steam heating boiler to be sht down for 6 months during the summer should be?

The final step in replacing a firetube is?

Who is qualified to do a weld repair on boilers and pressure vessels?

State the name of the device that is used to detect fine cracks when used in combinaitno with a flourescent penetrant?

Just before entering the waterside of the boiler it is important to?