Boiler Exam Practice Quiz

Reviewed by Editorial Team

The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.

Learn about Our Editorial Process

| By Dryrott

Dryrott

Community Contributor

Quizzes Created: 1 | Total Attempts: 1,663

| Attempts: 1,825

Questions

Feedback

During the Quiz End of Quiz

Difficulty

Easy First Hard First Sequential

1/167 Questions

38 purpose of a safety valve on a steam boiler is to
- A regulate or control an even amount of steam pressure
- B regulate the blow back
- C prevent the pressure in a steam boiler from exceeding its maximum allowable working pressure.

About This Quiz

This 'boiler exam practice quiz' assesses knowledge on boiler efficiency, heat transfer types, and boiler design. It covers key concepts in thermal engineering, making it relevant for students and professionals in mechanical and energy systems engineering.

Quiz Preview

2.

1)a (RPZ) reduced pressure zone or back flow preventer prevents contaninated water from entering the domestic water supply.
- True
- False
Correct Answer

A. True

Explanation

A (RPZ) reduced pressure zone or backflow preventer is a device that is used to protect the domestic water supply from contamination. It works by creating a barrier between the potable water system and any potential sources of contamination. This prevents contaminated water from flowing back into the drinking water supply. Therefore, the statement that a (RPZ) reduced pressure zone or backflow preventer prevents contaminated water from entering the domestic water supply is true.

Rate this question:
3.

92what three things are required to support combustion?
- A fuel, an arc, and time
- B fuel, heat, and oxygen
- C fuel, an arc, and temperature
Correct Answer

A. B fuel, heat, and oxygen

Explanation

Combustion is a chemical reaction that occurs when fuel combines with oxygen in the presence of heat. In order for combustion to take place, three things are required: fuel, heat, and oxygen. Fuel provides the substance that will undergo combustion, heat is necessary to initiate and sustain the reaction, and oxygen acts as the oxidizing agent that combines with the fuel. Therefore, option B, which includes fuel, heat, and oxygen, is the correct answer.

Rate this question:
4.

What should be displayed in the boiler room
- Vacation schedule, chemicals used, and insurance papers
- Boiler operator lecense, certificat of inspeciton or exemption state inspector private ins.
Correct Answer

A. Boiler operator lecense, certificat of inspeciton or exemption state inspector private ins.

Explanation

The items that should be displayed in the boiler room are the boiler operator license, certificate of inspection or exemption, state inspector private insurance. These documents are necessary to ensure that the boiler is being operated legally and safely. The license indicates that the operator is qualified and trained to handle the boiler, while the certificate of inspection or exemption proves that the boiler has been inspected and meets the necessary safety standards. The state inspector private insurance provides liability coverage in case of any accidents or damages caused by the boiler.

Rate this question:
5.

Draft is the difference in pressure between tow points that cause air gases to flow
- True
- False
Correct Answer

A. True

Explanation

Draft refers to the difference in pressure between two points that causes air or gases to flow. This means that when there is a variation in pressure, such as a higher pressure in one area compared to another, it creates a force that pushes the air or gases to move from the high-pressure area to the low-pressure area. Therefore, the statement "draft is the difference in pressure between two points that cause air & gases to flow" is true.

Rate this question:
6.

89 the most important safety device on a steam or liquid boiler is what? A the steam or altitude gauge B the water column C the gauge glass D the safety of safety relief valve
- A the steam or altitude gauge
- B the water column
- C the gauge glass
- D the safety of safety relief valve
Correct Answer

A. D the safety of safety relief valve

Explanation

The safety of safety relief valve is the most important safety device on a steam or liquid boiler because it is responsible for releasing excess pressure and preventing the boiler from exploding or causing other safety hazards.

Rate this question:
7.

97 what is required by statute, by the state of Minnesota, boiler inspection division for all boiler rooms?
- A a R stamp
- B a current inspection certificates and proper boiler engineer license
- C a boiler certificate
Correct Answer

A. B a current inspection certificates and proper boiler engineer license

Explanation

In the state of Minnesota, the boiler inspection division requires all boiler rooms to have a current inspection certificate and a proper boiler engineer license. This ensures that the boilers are regularly inspected for safety and that they are operated by qualified individuals who have the necessary knowledge and skills to handle them. The inspection certificate indicates that the boiler has been inspected and meets the required safety standards, while the boiler engineer license confirms that the person operating the boiler has the necessary qualifications and training.

Rate this question:
8.

61if you fail a state of Minnesota boiler operators license exam ho long must you wait before you can retake the exam?
- A 30 days
- B 20- days
- C 10 days
Correct Answer

A. A 30 days

Explanation

If you fail a state of Minnesota boiler operators license exam, you must wait for 30 days before you can retake the exam.

Rate this question:
9.

8) other that a safety relief valve what other safety device should be installed on a hot water heating boiler? a. city water fill valve b low water fuel cut off c a feed water regulator.
- A. city water fill valve
- B low water fuel cut off
- C a feed water regulator
Correct Answer

A. B low water fuel cut off

Explanation

A low water fuel cut off is a safety device that is installed on a hot water heating boiler to prevent damage or accidents caused by low water levels. When the water level in the boiler drops below a certain point, the low water fuel cut off automatically shuts off the fuel supply, preventing the boiler from operating without sufficient water. This helps to prevent overheating, explosions, and other potentially dangerous situations. The city water fill valve and feed water regulator are not specifically safety devices, but rather components that help to maintain the proper water level in the boiler.

Rate this question:
10.

20) what conditions are necessare to cause a furnace explosion? Atoo much aire b not enough air c accumulation of unburned fuel, oxygen and an igition source d to much fuel
- A too much aire
- B not enough air
- C accumulation of unburned fuel, oxygen and an igition source
- D to much fuel
Correct Answer

A. C accumulation of unburned fuel, oxygen and an igition source

Explanation

A furnace explosion can occur when there is an accumulation of unburned fuel, oxygen, and an ignition source. This means that there is a build-up of fuel that has not been burned, along with an adequate supply of oxygen and a source of ignition, such as a spark or flame. This combination creates a potentially explosive environment within the furnace.

Rate this question:
11.

31 on a steam boiler system, why are bottom blow down valves installed at the lowest point of the waterside of boilers? A to remove sludge and sediment B to remove make up water C to prevent corrosion
- A to remove sludge and sediment
- B to remove make up water
- C to prevent corrosion
Correct Answer

A. A to remove sludge and sediment

Explanation

Bottom blow down valves are installed at the lowest point of the waterside of boilers to remove sludge and sediment. Sludge and sediment can accumulate at the bottom of the boiler over time, which can negatively impact the efficiency and performance of the system. By installing bottom blow down valves at the lowest point, these impurities can be flushed out of the system, ensuring that the boiler operates at optimal levels. This helps to maintain the longevity and effectiveness of the boiler system.

Rate this question:
12.

66 in a hot water heating system what would prevent the hot water from circulation through a room heating unit?
- A trapped air
- B water too hot
- C back flow preventor valve
Correct Answer

A. A trapped air

Explanation

Trapped air can prevent hot water from circulating through a room heating unit in a hot water heating system. When air gets trapped in the system, it forms a blockage and prevents the flow of hot water. This can lead to inefficient heating or complete failure of the heating unit. To ensure proper circulation, it is important to remove any trapped air from the system through bleeding or purging the air.

Rate this question:

1
13.

95 on a steam boiler system, shat is the first thing a boiler operator should do when entering a boiler room?
- A blow down the boiler
- B check the water level in the boiler
- check the fire in the combustion
Correct Answer

A. B check the water level in the boiler

Explanation

When entering a boiler room, the first thing a boiler operator should do is check the water level in the boiler. This is important because an insufficient water level can lead to overheating and potential damage to the boiler. By checking the water level, the operator ensures that there is enough water to maintain proper functioning and prevent any safety hazards.

Rate this question:
14.

98 fuel oxygen and heat are required to start and sustain a fire:
- True
- False
Correct Answer

A. True

Explanation

Fuel, oxygen, and heat are the three components necessary to start and sustain a fire. Fuel provides the material that will burn, oxygen is required for the combustion process, and heat is needed to reach the ignition temperature of the fuel. Without any of these three elements, a fire cannot occur. Therefore, the statement "98 fuel oxygen and heat are required to start and sustain a fire" is true.

Rate this question:
15.

Steam bolier are low pressure when steam boiler are not over 15 psi and liquid boiler are not over 160 psi or 250 deg
- True
- False
Correct Answer

A. True

Explanation

The statement is true because steam boilers are typically designed to operate at lower pressures, usually not exceeding 15 psi. On the other hand, liquid boilers, such as water boilers, can operate at higher pressures, but not exceeding 160 psi. Additionally, the temperature limit for liquid boilers is typically around 250 degrees Fahrenheit. Therefore, the statement accurately describes the pressure and temperature limits for steam and liquid boilers.

Rate this question:
16.

7)can a low water condition occur in a hot water heating type boiler?
- A no, because the boiler is completely filled with water.
- B yes, for numerous reasons
- c no , because there is water in the expansion tank
Correct Answer

A. B yes, for numerous reasons

Explanation

A low water condition can occur in a hot water heating type boiler due to various reasons such as a malfunctioning feedwater valve, a leak in the system, or insufficient water supply. When the water level drops below a certain point, it can lead to overheating of the boiler and potential damage. Therefore, it is important to monitor the water level and ensure proper functioning of the boiler to prevent a low water condition.

Rate this question:
17.

45 boiler are considered low pressure when:
- Steam boiler are not over 15 psi and liquid boiler are not over 160 psi and 250 deg F
- Steam boilers not over 30 psi hot water boiler not over 50 psi
- Steam boiler not over 20 psi liquid boiler not over 100 psi 212 deg F
Correct Answer

A. Steam boiler are not over 15 psi and liquid boiler are not over 160 psi and 250 deg F

Explanation

The correct answer states that steam boilers are considered low pressure when they are not over 15 psi and liquid boilers are considered low pressure when they are not over 160 psi and 250 deg F. This means that for a steam boiler to be classified as low pressure, the pressure should not exceed 15 psi, and for a liquid boiler to be classified as low pressure, the pressure should not exceed 160 psi and the temperature should not exceed 250 deg F.

Rate this question:
18.

Who does a pressure control attached to the steam space of a boiler control the burner operation?
- Burner starts on pressure decrease stops on pressure increase
- Starts burner on pressure increase
- Stopes burner on pressure
Correct Answer

A. Burner starts on pressure decrease stops on pressure increase

Explanation

The pressure control attached to the steam space of a boiler is responsible for regulating the burner operation. It ensures that the burner starts when there is a decrease in pressure and stops when there is an increase in pressure. This control mechanism helps maintain a consistent pressure level within the boiler and prevents any potential damage or malfunctioning.

Rate this question:
19.

7)how many different types of air are there? a)1 b2 c3 d4
- A 1
- B 2
- C 3
- D 4
Correct Answer

A. C 3

Explanation

The question asks about the number of different types of air. The correct answer is "c) 3" which means that there are three different types of air.

Rate this question:
20.

9) what is the internal resistance to the flow of fuel oil? a.flash point b viscosity c fire point d pour point
- A.flash point
- B viscosity
- c fire point
- d pour point
Correct Answer

A. B viscosity

Explanation

The correct answer is b viscosity. Viscosity refers to the resistance of a fluid, such as fuel oil, to flow. It is a measure of the thickness or stickiness of the fluid. A higher viscosity indicates a thicker fluid, which means it has a higher resistance to flow. Therefore, the internal resistance to the flow of fuel oil can be determined by its viscosity.

Rate this question:
21.

16)If wate in the gauge glass is not visible because of failure of the feed water supply, what should be done?
- A add water immediately through the manual fill line
- B shut off the fuel to the burner and secure the boiler
- C notify the boiler inspector but continue to run the boiler
Correct Answer

A. B shut off the fuel to the burner and secure the boiler

Explanation

In the given scenario, if the water in the gauge glass is not visible due to a failure in the feed water supply, it indicates that there is a potential risk of the boiler running dry. This can lead to overheating and damage to the boiler. Therefore, the correct course of action would be to shut off the fuel to the burner and secure the boiler to prevent any further damage or accidents. This will ensure the safety of the boiler and prevent any potential hazards.

Rate this question:
22.

30 in a steam boiler system, what is the term used for replacing the water that has been lost by blowng down the boiler or through leaks in the system? A make up water B condensate C feed replacement
- A make up water
- B condensate
- C feed replacement
Correct Answer

A. A make up water

Explanation

In a steam boiler system, when water is lost due to blowing down the boiler or leaks in the system, the term used for replacing this lost water is "make up water". This refers to adding new water to the system to compensate for the water that has been lost. The other options, condensate and feed replacement, do not specifically refer to the act of replacing lost water in a steam boiler system.

Rate this question:
23.

66 in a hot water heating system what would prevent the hot water from circulation through a room heating unit?
- A trapped air
- B water too hot
- C back flow preventor valve
Correct Answer

A. A trapped air

Explanation

Trapped air can prevent hot water from circulating through a room heating unit in a hot water heating system. When air becomes trapped in the system, it forms an air pocket that blocks the flow of hot water. This can lead to reduced or no heat being delivered to the room. To resolve this issue, the trapped air needs to be released through a process called bleeding the system, which involves opening a valve to allow the air to escape.

Rate this question:

3
24.

24 the unit that shuts off the burner in the event of low water is: a feed water pump b safety valve c low water fuel cut out d operating contrb safety valveol
- A feed water pump
- B safety valve
- C low water fuel cut out
- d operating control
Correct Answer

A. C low water fuel cut out

Explanation

The correct answer is c) low water fuel cut out. This unit is responsible for shutting off the burner if the water level in the system drops too low. It is a safety feature to prevent damage to the burner and ensure that there is enough water in the system for proper operation.

Rate this question:
25.

67 draft is the difference in pressure between tow points that cause air?
- True
- False
Correct Answer

A. True

Explanation

The given statement is incomplete and not readable, so it is not possible to generate an explanation for the correct answer.

Rate this question:
26.

85when testing the low water fuel cutoff on a steam boiler the burner shoud be firing why?
- A to see if the flame pops
- B to see if the burner shuts off
- C to make sure the burner starts in the low fire position.
Correct Answer

A. B to see if the burner shuts off

Explanation

When testing the low water fuel cutoff on a steam boiler, the burner should be firing to see if it shuts off. This is because the low water fuel cutoff is designed to shut off the burner when the water level in the boiler drops below a safe level. By testing the cutoff while the burner is firing, it can be ensured that it functions properly in shutting off the burner when needed to prevent any potential hazards or damage to the boiler.

Rate this question:
27.

2)Boilers and boiler fittings used in the state of Minnesota must be constructed to what code?
- 2)Boilers and boiler fittings used in the state of Minnesota must be constructed to what code? A N.E.C. B. A.S.M.E. C. City code d. N.F.P. A. A N.E.C
- B. A.S.M.E.
- C. City code
- D. N.F.P. A
Correct Answer

A. B. A.S.M.E.

Explanation

Boilers and boiler fittings used in the state of Minnesota must be constructed to the A.S.M.E. code.

Rate this question:
28.

In order form a fuel to burn it must be heated to:
- A 212 f
- B at least 1000 f
- C its ignition temperture
Correct Answer

A. C its ignition temperture

Explanation

In order for a fuel to burn, it must reach its ignition temperature. This is the minimum temperature at which the fuel can sustain combustion. Once the fuel reaches this temperature, it reacts with oxygen in the air and undergoes a chemical reaction called combustion, releasing heat and light. Therefore, heating the fuel to its ignition temperature is necessary for it to burn.

Rate this question:
29.

78 the dial on a pressure gauge used on a low pressure boiler should be graduated:
- V to the maximum allowable working pressure
- W one and one half to two times the maximum allowable working pressure
- X threee times the maximum allowable working pressure
Correct Answer

A. W one and one half to two times the maximum allowable working pressure

Explanation

The dial on a pressure gauge used on a low pressure boiler should be graduated one and one half to two times the maximum allowable working pressure. This is because the pressure gauge needs to be able to accurately measure the pressure within the boiler, and having a graduated dial that is one and a half to two times the maximum allowable working pressure ensures that the gauge can accurately display the pressure within the safe operating range of the boiler.

Rate this question:
30.

93 what can result if condensate is picked up with the steam as it travels through the main steam branch lines?
- A steam bound piping
- B water hammer
- C steam line will be cooler
- D steam line will be hotter
Correct Answer

A. B water hammer

Explanation

If condensate is picked up with the steam as it travels through the main steam branch lines, it can result in water hammer. Water hammer occurs when the condensate, which is heavier than steam, rapidly accumulates and creates a pressure surge in the pipes. This sudden increase in pressure can cause loud banging noises, damage to the piping system, and even equipment failure.

Rate this question:
31.

26 furnace explosings are caused by a build up of combustible gases, or vapors in the combustion chamber, what is the term used to remedy this condition? A clearing B modulating C purging D huddling
- A clearing
- B modulating
- C purging
- D huddling
Correct Answer

A. C purging
32.

44 what action should an operating engineer take if a defect is discovered in a boiler requiring repairs not of a routine nature? t
- A notify the boiler inspector
- B notify the sheriff
- C notify another engineer in the plant
Correct Answer

A. A notify the boiler inspector

Explanation

If a defect is discovered in a boiler requiring repairs not of a routine nature, the operating engineer should notify the boiler inspector. This is because the boiler inspector is responsible for ensuring the safety and compliance of boilers. By notifying the boiler inspector, they can assess the defect and determine the appropriate course of action to address the issue and ensure the boiler is repaired properly.

Rate this question:
33.

77 after repair work is done on the boiler a test is used to chek for leaks: what king of test is used?
- R a flame scanner test
- S accumulation tes
- T atmospheric test
- U hydrostatic test
Correct Answer

A. U hydrostatic test

Explanation

After repair work is done on the boiler, a hydrostatic test is used to check for leaks. This test involves filling the boiler with water and pressurizing it to a specific level. If there are any leaks, they will be detected by the water escaping from the boiler. This test is commonly used to ensure the integrity and safety of the boiler after repairs have been made.

Rate this question:

0
34.

What is the term used when a safety valve opens open when the pressure exceed the maximum allowable working pressue and stays open until a sufficient amount of steam is released and when there is definite drop in pressue inside the boiler
- Hang up
- Cut out pressure
- Blow down blow back
- Over pressure
Correct Answer

A. Blow down blow back

Explanation

The term used when a safety valve opens open when the pressure exceeds the maximum allowable working pressure and stays open until a sufficient amount of steam is released and when there is a definite drop in pressure inside the boiler is "blow down blow back".

Rate this question:
35.

2)How many ways can heat be transferred?
- A 1
- B 2
- C 3
- D 4
Correct Answer

A. C 3

Explanation

Heat can be transferred in three ways: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact, such as when a hot pan heats up the handle. Convection is the transfer of heat through the movement of fluids, such as when warm air rises and cool air sinks. Radiation is the transfer of heat through electromagnetic waves, such as when heat from the sun reaches the Earth. Therefore, there are three ways in which heat can be transferred.

Rate this question:
36.

34 in a fire tube boiler, the water
- A surrounds the tubes
- B is inside the tubes
- C both inside and outside of the tubes
Correct Answer

A. A surrounds the tubes

Explanation

In a fire tube boiler, the water surrounds the tubes. This means that the water is located on the outside of the tubes while the hot gases produced by the combustion process flow inside the tubes. The heat from the gases is transferred to the water through the tube walls, resulting in the generation of steam. This design allows for efficient heat transfer and is commonly used in smaller, low-pressure boilers.

Rate this question:
37.

72 in a steam boiler system a possible water hammer is caused by:
- D carryover
- E a plugged water column
- F a pulsating flame
Correct Answer

A. D carryover

Explanation

Carryover in a steam boiler system refers to the unintentional entrainment of water droplets in the steam. This can occur due to high steam velocities or inadequate separation of water and steam. When carryover happens, the water droplets can reach high velocities and collide with solid surfaces, causing a sudden impact known as water hammer. Water hammer can result in damage to pipes, valves, and other components of the system. Therefore, carryover is a possible cause of water hammer in a steam boiler system.

Rate this question:
38.

79 the three basic tpes of low pressure boiler are:
- Y fire box, fire tube, fire flue
- Z water channel , fire tube, updraf
- Aa fire tube, water tube cast iron sectional
Correct Answer

A. Aa fire tube, water tube cast iron sectional

Explanation

The correct answer is "fire tube, water tube, cast iron sectional." This is because low pressure boilers can be classified into three basic types based on their design and construction. Fire tube boilers have tubes filled with hot gases that transfer heat to the water surrounding them. Water tube boilers have tubes filled with water that are heated by hot gases passing over them. Cast iron sectional boilers are made up of individual cast iron sections that are assembled together to form a complete boiler unit.

Rate this question:
39.

80 if idle boilers are left filled with water, what precaution should be taken to prevent corrosion an oxygen pitting?
- A keep the boiler water warm
- B keep the boiler water properly treated
- C blow down the boiler once a day
- D remove chemicals from boiler water
Correct Answer

A. B keep the boiler water properly treated

Explanation

To prevent corrosion and oxygen pitting in idle boilers, it is important to keep the boiler water properly treated. This means adding chemicals to the water to inhibit corrosion and control the levels of dissolved oxygen. Proper treatment helps to maintain the pH balance of the water and prevent the formation of rust and other corrosive elements. By keeping the boiler water properly treated, the risk of corrosion and oxygen pitting is significantly reduced.

Rate this question:
40.

26 when a safety valve opens and closes rapidly it is referred to as: a chattering b popping c blow back d pressuring
- A chattering
- B popping
- C blow back
- D pressuring
Correct Answer

A. A chattering

Explanation

When a safety valve opens and closes rapidly, it is referred to as "chattering." This term is used to describe the rapid and repeated movement of the valve, which can occur when there is a fluctuation in pressure or when the valve is not functioning properly. Chattering can be a sign of a malfunctioning valve and can potentially lead to damage or failure if not addressed.

Rate this question:
41.

32 heating surface is defined as:
- A a hot surface
- B the surface used for heating
- C water on one side hot gas on the other side.
Correct Answer

A. C water on one side hot gas on the other side.

Explanation

The correct answer is c because heating surface refers to a surface that separates water and hot gas in a heat exchanger. This surface allows heat transfer from the hot gas to the water, resulting in the heating of the water.

Rate this question:
42.

70 the rapid burning of fuel and oxygen that results in the release of heat is called
- G purging
- H atomization
- I combustion
Correct Answer

A. I combustion

Explanation

Combustion refers to the rapid burning of fuel and oxygen that leads to the release of heat.

Rate this question:

1
43.

5)the first sequence in the series of automatic bgurner controls is:
- A. ignition
- B purging
- C. to make up the gas switch
- D startup on low fire
Correct Answer

A. B purging

Explanation

The correct answer is b) purging. Purging is the process of removing any accumulated gas or air from the burner before ignition. This ensures that the burner starts with a clean and safe environment, preventing any potential hazards. Once purging is complete, the ignition process can begin. The other options listed, such as ignition, making up the gas switch, and startup on low fire, are steps that occur after purging in the sequence of automatic burner controls.

Rate this question:

1
44.

29 why is a pigtail or siphon required in steam pressure gauge lines? Ato prevent water hammer B to protect the gauge from a high temperature C to reduce the pressure
- A to prevent water hamme
- B to protect the gauge from a high temperature
- C to reduce the pressure
Correct Answer

A. B to protect the gauge from a high temperature

Explanation

A pigtail or siphon is required in steam pressure gauge lines to protect the gauge from high temperatures. Steam can reach very high temperatures, and without a pigtail or siphon, the direct contact with the steam could damage the gauge or give inaccurate readings. The pigtail or siphon acts as a barrier, allowing the steam to cool before reaching the gauge, thus preventing any damage or inaccuracies caused by high temperatures.

Rate this question:
45.

33 if a steam trap on a radiator of a steam heating system becomes water logged, what will happen?
- A the radiator will overheat
- B the radiator will not heat the room properly
- C the steam trap will leak
Correct Answer

A. B the radiator will not heat the room properly

Explanation

If a steam trap on a radiator of a steam heating system becomes water logged, it means that the trap is not functioning properly and is unable to remove condensate from the system effectively. As a result, the radiator will not receive sufficient steam and will not be able to heat the room properly.

Rate this question:
46.

94 what are used to direct the flow of gases through out the boiler? A
- A combustion controls
- B fire tubes
- C baffles
Correct Answer

A. C baffles

Explanation

Baffles are used to direct the flow of gases throughout the boiler. They are plates or barriers that are placed inside the boiler to change the direction of the gases and create turbulence. This helps to increase the heat transfer efficiency and ensure that the gases are evenly distributed throughout the boiler. Baffles also help to prevent the gases from bypassing certain areas of the boiler, ensuring that all parts of the boiler are properly heated.

Rate this question:
47.

96On some steam boiler system vacuum pumps are used why a to increase pressure b it creates a vacuum on the return lines drawing back condensate to the vacuum tank c to insure the proper operation of steam traps
- A to increase pressure
- B it creates a vacuum on the return lines drawing back condensate to the vacuum tank
- C to insure the proper operation of steam traps
Correct Answer

A. B it creates a vacuum on the return lines drawing back condensate to the vacuum tank

Explanation

Vacuum pumps are used in steam boiler systems to create a vacuum on the return lines. This vacuum helps in drawing back the condensate to the vacuum tank. By creating a vacuum, the pump facilitates the movement of condensate, which is the liquid formed when steam cools down, back to the tank. This is important for the efficient operation of the steam boiler system.

Rate this question:
48.

Heating surface is defined as
- A hot surface
- The surface used for heating
- Water on one side hot gas on the other side
Correct Answer

A. Water on one side hot gas on the other side

Explanation

The correct answer is "water on one side hot gas on the other side." This definition accurately describes a heating surface, which refers to a surface that is used to transfer heat from one medium to another. In this case, the heating surface is specifically used to transfer heat from water on one side to hot gas on the other side. This explanation aligns with the given options and provides a clear understanding of what a heating surface is.

Rate this question:
49.

3)what is the unit called that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler? b. pressure taqua stat roll c. vapor stat d. flow control valve
- A aqua stat
- B pressure troll
- c. vapor stat
- D. flow control valve
Correct Answer

A. A aqua stat

Explanation

The unit that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler is called an aqua stat.

Rate this question:

Quiz Review Timeline (Updated): Aug 7, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Aug 07, 2024

Quiz Edited by
ProProfs Editorial Team
Sep 11, 2015

Quiz Created by
Dryrott

Recent Quizzes

Test Your Knowledge: Special Boiler Quiz Test Your Knowledge: Special Boiler Quiz

new class 1c boiler exam new class 1c boiler exam

Ultimate Steam Boiler Trivia Quiz! Exam Ultimate Steam Boiler Trivia Quiz! Exam

Steam Boiler Quiz Steam Boiler Quiz

4th class boiler test 2 4th class boiler test 2

High pressure boiler quiz questions and answers High pressure boiler quiz questions and answers

Back to top

Boiler Exam Practice Quiz

38 purpose of a safety valve on a steam boiler is to

Quiz Preview

1)a (RPZ) reduced pressure zone or back flow preventer prevents contaninated water from entering the domestic water supply.

92what three things are required to support combustion?

What should be displayed in the boiler room

Draft is the difference in pressure between tow points that cause air gases to flow

89 the most important safety device on a steam or liquid boiler is what? A the steam or altitude gauge B the water column C the gauge glass D the safety of safety relief valve

97 what is required by statute, by the state of Minnesota, boiler inspection division for all boiler rooms?

61if you fail a state of Minnesota boiler operators license exam ho long must you wait before you can retake the exam?

8) other that a safety relief valve what other safety device should be installed on a hot water heating boiler? a. city water fill valve b low water fuel cut off c a feed water regulator.

20) what conditions are necessare to cause a furnace explosion? Atoo much aire b not enough air c accumulation of unburned fuel, oxygen and an igition source d to much fuel

31 on a steam boiler system, why are bottom blow down valves installed at the lowest point of the waterside of boilers? A to remove sludge and sediment B to remove make up water C to prevent corrosion

66 in a hot water heating system what would prevent the hot water from circulation through a room heating unit?

95 on a steam boiler system, shat is the first thing a boiler operator should do when entering a boiler room?

98 fuel oxygen and heat are required to start and sustain a fire:

Steam bolier are low pressure when steam boiler are not over 15 psi and liquid boiler are not over 160 psi or 250 deg

7)can a low water condition occur in a hot water heating type boiler?

45 boiler are considered low pressure when:

Who does a pressure control attached to the steam space of a boiler control the burner operation?

7)how many different types of air are there? a)1 b2 c3 d4

9) what is the internal resistance to the flow of fuel oil? a.flash point b viscosity c fire point d pour point

16)If wate in the gauge glass is not visible because of failure of the feed water supply, what should be done?

30 in a steam boiler system, what is the term used for replacing the water that has been lost by blowng down the boiler or through leaks in the system? A make up water B condensate C feed replacement

66 in a hot water heating system what would prevent the hot water from circulation through a room heating unit?

24 the unit that shuts off the burner in the event of low water is: a feed water pump b safety valve c low water fuel cut out d operating contrb safety valveol

67 draft is the difference in pressure between tow points that cause air?

85when testing the low water fuel cutoff on a steam boiler the burner shoud be firing why?

2)Boilers and boiler fittings used in the state of Minnesota must be constructed to what code?

In order form a fuel to burn it must be heated to:

78 the dial on a pressure gauge used on a low pressure boiler should be graduated:

93 what can result if condensate is picked up with the steam as it travels through the main steam branch lines?

26 furnace explosings are caused by a build up of combustible gases, or vapors in the combustion chamber, what is the term used to remedy this condition? A clearing B modulating C purging D huddling

44 what action should an operating engineer take if a defect is discovered in a boiler requiring repairs not of a routine nature? t

77 after repair work is done on the boiler a test is used to chek for leaks: what king of test is used?

What is the term used when a safety valve opens open when the pressure exceed the maximum allowable working pressue and stays open until a sufficient amount of steam is released and when there is definite drop in pressue inside the boiler

2)How many ways can heat be transferred?

34 in a fire tube boiler, the water

72 in a steam boiler system a possible water hammer is caused by:

79 the three basic tpes of low pressure boiler are:

80 if idle boilers are left filled with water, what precaution should be taken to prevent corrosion an oxygen pitting?

26 when a safety valve opens and closes rapidly it is referred to as: a chattering b popping c blow back d pressuring

32 heating surface is defined as:

70 the rapid burning of fuel and oxygen that results in the release of heat is called

5)the first sequence in the series of automatic bgurner controls is:

29 why is a pigtail or siphon required in steam pressure gauge lines? Ato prevent water hammer B to protect the gauge from a high temperature C to reduce the pressure

33 if a steam trap on a radiator of a steam heating system becomes water logged, what will happen?

94 what are used to direct the flow of gases through out the boiler? A

96On some steam boiler system vacuum pumps are used why a to increase pressure b it creates a vacuum on the return lines drawing back condensate to the vacuum tank c to insure the proper operation of steam traps

Heating surface is defined as

3)what is the unit called that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler? b. pressure taqua stat roll c. vapor stat d. flow control valve