This Quiz On Building Utilities 11 Is Only For Geniuses
As we continue revising on building utilities the quiz below is the 11th one and is designed to put you on the right track before the exams. It is only designed for geniuses so if you can get a good score you should consider yourself ready for the exams. All the best!
Questions and Answers
- 1.
A type of perimeter detector which is subject to false alarm from aircraft radar and from movement outside building through window, wood doors, and the like. It uses radio waves.
- A.
Microwave
- B.
Passive Infrared with Ultrasonic (or Microwave)
- C.
Proximity / Capacitance
- D.
Ultrasonic
Correct Answer
A. MicrowaveExplanation
Microwave is the correct answer because it is a type of perimeter detector that uses radio waves. It is subject to false alarms from aircraft radar and movement outside the building through windows, wood doors, and similar objects. Microwave detectors emit microwave signals and detect any changes in the reflected signals caused by movement, triggering an alarm if detected.Rate this question:
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- 2.
This type of perimeter detector uses both the Passive infrared and Ultrasonic or Microwave system.
- A.
Microwave
- B.
Passive Infrared with Ultrasonic (or Microwave)
- C.
Proximity / Capacitance
- D.
Ultrasonic
Correct Answer
B. Passive Infrared with Ultrasonic (or Microwave)Explanation
Passive Infrared with Ultrasonic (or Microwave) is the correct answer because this type of perimeter detector utilizes both the Passive Infrared (PIR) technology and either Ultrasonic or Microwave systems. PIR detects changes in infrared radiation emitted by objects, while Ultrasonic or Microwave systems use sound waves or radio waves to detect movement. By combining these technologies, the detector can provide more accurate and reliable detection of perimeter breaches.Rate this question:
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- 3.
This type of perimeter detector detects a change in capacitance of the area covered, caused by intrusion.
- A.
Microwave
- B.
Passive Infrared with Ultrasonic (or Microwave)
- C.
Proximity / Capacitance
- D.
Ultrasonic
Correct Answer
C. Proximity / CapacitanceExplanation
A proximity/capacitance perimeter detector is able to detect intrusion by sensing a change in capacitance in the covered area. When an object or person enters the area, it disrupts the capacitance, triggering an alarm. This type of detector is effective in detecting intrusion as it can sense even slight changes in the capacitance, making it highly sensitive and accurate.Rate this question:
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- 4.
Color code for pipes containing acid.
- A.
Orange
- B.
Yellow
- C.
Red
- D.
Black
Correct Answer
D. BlackExplanation
Black is the correct color code for pipes containing acid. This color is commonly used to indicate the presence of highly corrosive substances such as acids. The color black serves as a warning to individuals working with these pipes to exercise caution and take appropriate safety measures.Rate this question:
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- 5.
A high intensity discharge lamp in which the light is produced by the radiation from a mixture of a metallic vapor, similar to that of a mercury lamp in construction.
- A.
Mercury Lamp
- B.
Metal Halide Lamp
- C.
Tungsten Halogen Lamp
- D.
High-Pressure-Sodium (HPS)
Correct Answer
B. Metal Halide LampExplanation
A metal halide lamp is a type of high intensity discharge lamp that produces light through radiation from a mixture of metallic vapor. It is similar in construction to a mercury lamp, but the metallic vapor in a metal halide lamp is different. This explanation highlights the key characteristics of a metal halide lamp and distinguishes it from other types of lamps mentioned in the options.Rate this question:
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- 6.
A type of lamp popular for lighting commercial interiors, uses argon gas to ease starting, it produces light by means of an electric discharge in mercury vapor.
- A.
Mercury Lamp
- B.
Metal Halide Lamp
- C.
Tungsten Halogen Lamp
- D.
High-Pressure-Sodium (HPS)
Correct Answer
A. Mercury LampExplanation
A mercury lamp is a type of lamp that is commonly used for lighting commercial interiors. It utilizes argon gas to facilitate starting and produces light through an electric discharge in mercury vapor.Rate this question:
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- 7.
A type of lamp which produces light by means of the reaction of halogen additive in the bulb reacts with chemically with tungsten.
- A.
Mercury Lamp
- B.
Metal Halide Lamp
- C.
Tungsten Halogen Lamp
- D.
High-Pressure-Sodium (HPS)
Correct Answer
C. Tungsten Halogen LampExplanation
A tungsten halogen lamp is a type of lamp that produces light through the reaction of a halogen additive in the bulb with tungsten. The halogen cycle allows for the re-deposition of tungsten back onto the filament, increasing the lifespan of the lamp. This type of lamp is commonly used in applications where a high-quality, bright light is required, such as in photography or stage lighting.Rate this question:
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- 8.
A type of lamp generally used for roadways and sidewalks, uses sodium gas.
- A.
Mercury Lamp
- B.
Metal Halide Lamp
- C.
Tungsten Halogen Lamp
- D.
High-Pressure-Sodium (HPS)
Correct Answer
D. High-Pressure-Sodium (HPS)Explanation
The correct answer is High-Pressure-Sodium (HPS). High-Pressure-Sodium lamps are commonly used for roadways and sidewalks because they emit a bright yellow light that improves visibility at night. These lamps work by passing an electric current through a mixture of sodium and mercury vapor, which produces a high-intensity discharge. The sodium gas in the lamp helps to create the characteristic yellow light that is effective for outdoor lighting applications.Rate this question:
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- 9.
In elevator, it detects the obstacles during the door closing, and reopens the door if there is something. Photocell can be used together with this.
- A.
Safety Shoe
- B.
Weighing Device
- C.
Fascia Plate
- D.
Handrail Guard
Correct Answer
A. Safety ShoeExplanation
A safety shoe is the correct answer because it is a device that can be used in elevators to detect obstacles during the door closing. If the safety shoe detects something in its path, it triggers the elevator to reopen the door, preventing any accidents or injuries. This device is often used in conjunction with a photocell for added safety measures.Rate this question:
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- 10.
It prevents passengers from falling into the hoistway when they try to get out of the car which is stopped between the floors.
- A.
Weighing Device
- B.
Handrail Guard Switches
- C.
Fascia Plate
- D.
Sheave
Correct Answer
C. Fascia PlateExplanation
The fascia plate is the correct answer because it serves as a protective barrier that prevents passengers from falling into the hoistway when they try to exit the elevator car. It is located on the sides of the elevator car and acts as a barrier between the car and the hoistway. This safety feature ensures that passengers are not able to access the hoistway when the elevator is stopped between floors, reducing the risk of accidents or injuries.Rate this question:
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- 11.
In elevator, it makes the buzzer alarm when the car is overloaded and the door remains open until overloading is eliminated.
- A.
Weighing Device
- B.
Handrail Guard Switches
- C.
Fascia Plate
- D.
Sheave
Correct Answer
A. Weighing DeviceExplanation
The weighing device in an elevator is responsible for detecting if the car is overloaded. When the car exceeds its maximum weight capacity, the weighing device triggers the buzzer alarm, alerting passengers and operators of the overloading. Additionally, the door remains open until the excess weight is removed, ensuring the safety of the elevator and its occupants.Rate this question:
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- 12.
In elevator, these prevent the excessive car travel at the highest and lowest floor.
- A.
Circuit Breaker
- B.
Handrail Guard Switches
- C.
Limit Switches
- D.
Disconnect Switch
Correct Answer
C. Limit SwitchesExplanation
Limit switches are devices that are used to control the movement of an elevator car and prevent it from traveling beyond the highest and lowest floors. These switches are placed at the top and bottom of the elevator shaft and are activated when the car reaches these extreme positions. When the limit switch is triggered, it sends a signal to the elevator control system to stop the motor and prevent any further movement. This ensures the safety of the passengers and prevents any damage to the elevator by preventing excessive car travel.Rate this question:
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- 13.
In escalators, these stop the escalator if a foreign object becomes wedged at the guard.
- A.
Circuit Breaker
- B.
Handrail Guard Switches
- C.
Limit Switches
- D.
Disconnect Switch
Correct Answer
B. Handrail Guard SwitchesExplanation
Handrail Guard Switches are designed to stop the escalator if a foreign object becomes wedged at the guard. These switches are typically located at the entrance and exit points of the escalator, and they are activated when the handrail guard detects an obstruction. When an object gets stuck in the guard, the switch is triggered, sending a signal to the control system to stop the escalator immediately. This safety feature prevents accidents and injuries by halting the escalator's movement when a foreign object is detected, ensuring the safety of passengers.Rate this question:
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- 14.
In escalators, this is located at the bottom truss of the escalator and provided with on and off positions to stop or prevents the escalator from starting during maintenance service.
- A.
Circuit Breaker
- B.
Handrail Guard Switches
- C.
Limit Switches
- D.
Disconnect Switch
Correct Answer
D. Disconnect SwitchExplanation
The disconnect switch is located at the bottom truss of the escalator and has on and off positions. It is used to stop or prevent the escalator from starting during maintenance service. This switch is important for ensuring the safety of maintenance workers and preventing accidents while the escalator is being serviced. It allows the power supply to be disconnected, effectively cutting off the electrical connection to the escalator.Rate this question:
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- 15.
This device, in escalators, is provided at the drive unit location to protect against accidental movement of the escalator during inspection of the drives or during general maintenance.
- A.
Mechanical Maintenance Locking Device
- B.
Disconnect Switch
- C.
Knife Switch
- D.
Limit Switches
Correct Answer
A. Mechanical Maintenance Locking DeviceExplanation
The correct answer is the Mechanical Maintenance Locking Device. This device is installed at the drive unit location of escalators to prevent any accidental movement of the escalator while it is being inspected or undergoing general maintenance. It ensures the safety of the maintenance personnel by securely locking the escalator in place, preventing any unexpected movement that could cause accidents or injuries.Rate this question:
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- 16.
This device, in escalators, stops the escalator automatically if an abnormal current is supplied to the motor.
- A.
Disconnect Switch
- B.
Knife Switch
- C.
Limit Switches
- D.
Current Overload Safety Switch
Correct Answer
D. Current Overload Safety SwitchExplanation
The correct answer is "Current Overload Safety Switch." In escalators, a current overload safety switch is used to automatically stop the escalator if an abnormal current is supplied to the motor. This switch is designed to protect the motor from damage caused by excessive current flow, which can occur due to various reasons such as a malfunctioning motor or a mechanical obstruction. When the switch detects an abnormal current, it interrupts the power supply to the motor, bringing the escalator to a halt and preventing any further damage or potential hazards.Rate this question:
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- 17.
This switch cuts off all current supply to the escalator for inspection, maintenance, or repairs.
- A.
Disconnect Switch
- B.
Knife Switch
- C.
Limit Switches
- D.
Current Overload Safety Switch
Correct Answer
B. Knife SwitchExplanation
A knife switch is a type of switch that can be used to completely cut off the current supply to a device or system. In the context of the given question, a knife switch would be an appropriate choice because it allows for the complete disconnection of the current supply to the escalator. This is necessary for inspection, maintenance, or repairs to be carried out safely, as it ensures that no current is flowing through the escalator while work is being done.Rate this question:
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- 18.
In a lightning protection system, the combination of a metal rod and its brace or footing, on the upper part of a structure.
- A.
Ground Rod
- B.
Air Terminal
- C.
Lightning Rod
- D.
Protective Assembly
Correct Answer
B. Air TerminalExplanation
An air terminal is a device used in a lightning protection system that is installed on the upper part of a structure. It consists of a metal rod and its brace or footing. The purpose of the air terminal is to provide a preferred path for lightning to strike, diverting the electrical current safely into the ground. By attracting and capturing the lightning strike, the air terminal helps protect the structure and its occupants from potential damage and harm.Rate this question:
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- 19.
One of the earlier plastic to be developed in 1938, a du pont trade name for the white, soft, waxy, and non-adhesive polymer of tetrafluoroethylene.
- A.
Teflon
- B.
Solvent
- C.
O-ring
- D.
Adhesive
Correct Answer
A. TeflonExplanation
Teflon is the correct answer because it was one of the first plastics to be developed in 1938. It is a trade name for a white, soft, waxy, and non-adhesive polymer of tetrafluoroethylene. Teflon is known for its non-stick properties and is commonly used in cookware and as a coating for various products.Rate this question:
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- 20.
The number of cycles per unit time of a wave or oscillations expressed in hertz of cycles per second.
- A.
Wavelength
- B.
Frequency
- C.
Sine Wave
- D.
Sound Wave
Correct Answer
B. FrequencyExplanation
Frequency refers to the number of cycles or oscillations that occur in a given unit of time. It is measured in hertz (Hz), which represents the number of cycles per second. In the context of waves or oscillations, frequency determines the pitch of a sound wave or the color of a light wave. A higher frequency corresponds to a higher pitch or a bluer color, while a lower frequency corresponds to a lower pitch or a redder color. Therefore, frequency is the correct answer in this case.Rate this question:
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- 21.
Of a partition, the number of decibels by which sound is reduced in transmission through it; a measure of the sound insulation value of the partition, the higher the number, the greater the insulation value.
- A.
Transmission Loss
- B.
Audible Transmission
- C.
Sabin
- D.
Decibel Drop
Correct Answer
A. Transmission LossExplanation
Transmission loss refers to the number of decibels by which sound is reduced when it passes through a partition. It is a measure of the sound insulation value of the partition, with a higher number indicating greater insulation. This term is commonly used in acoustics and building construction to assess the effectiveness of soundproofing materials and techniques.Rate this question:
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- 22.
The cooling effect obtained when 1 ton of ice at 32 oF (0 oC) melts to water at the same tmeperature in 24 hrs. (equivalent to 12,000 Btu/hr)
- A.
HP of Refrigeration
- B.
Ton of Ventilation
- C.
Ton of Refrigeration
- D.
HP of Ventilation
Correct Answer
C. Ton of RefrigerationExplanation
The term "Ton of Refrigeration" refers to the amount of cooling capacity required to freeze or melt one ton of ice in 24 hours. In this case, since 1 ton of ice is melting to water at the same temperature in 24 hours, the cooling effect obtained is equivalent to one Ton of Refrigeration.Rate this question:
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- 23.
Which statement is not true?
- A.
Cleanouts may be omitted on a horizontal drain less than 1.5 meters in length unless such line is serving sinks or urinals.
- B.
No galvanized wrought iron or galvanized steel pipe shall be used underground and shall be kept at least 15 cms above ground.
- C.
1 3/4" diameter is 'not' a commercial size of G.I. Pipe for water supply.
- D.
3" diameter is 'not' a commercial size of G.I. Pipe for water supply.
Correct Answer
D. 3" diameter is 'not' a commercial size of G.I. Pipe for water supply.Explanation
The statement "3" diameter is 'not' a commercial size of G.I. Pipe for water supply" is not true because 3" diameter is indeed a commercial size of G.I. Pipe for water supply.Rate this question:
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- 24.
Which statement is not true?
- A.
Number of fixture unit is one parameter in sizing a drainage pipe.
- B.
Brass and cast iron body cleanouts shall not be used as a reducer or adapter.
- C.
60˚ branches or offsets may be used only when installed in a true vertical position.
- D.
Wooden septic tanks are allowed.
Correct Answer
D. Wooden septic tanks are allowed.Explanation
The statement "Wooden septic tanks are allowed" is not true. Wooden septic tanks are not allowed as they are not durable and can deteriorate over time. Septic tanks are typically made of concrete, fiberglass, or plastic materials that are resistant to decay and can safely contain and treat sewage.Rate this question:
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- 25.
TW in electrical wire specification means.
- A.
Moisture and Heat Resistant- Cross-Linked Thermosetting
- B.
Moisture resistant, in wet and dry location
- C.
Heat Resistant in wet and dry location
- D.
Moisture Resistant Cross-Linked Thermosetting
Correct Answer
B. Moisture resistant, in wet and dry locationExplanation
TW in electrical wire specification means that the wire is moisture resistant and can be used in both wet and dry locations. This indicates that the wire has been designed to withstand exposure to moisture without being damaged, making it suitable for use in various environments.Rate this question:
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- 26.
XHHN in wire specification means.
- A.
Moisture and Heat Resistant- Cross-Linked Thermosetting
- B.
Moisture resistant, in wet and dry location
- C.
Heat Resistant in wet and dry location
- D.
Moisture Resistant Cross-Linked Thermosetting
Correct Answer
A. Moisture and Heat Resistant- Cross-Linked ThermosettingExplanation
The correct answer is "Moisture and Heat Resistant- Cross-Linked Thermosetting". This answer indicates that XHHN in wire specification refers to a type of wire that is both moisture and heat resistant. Additionally, it mentions that the wire is made of cross-linked thermosetting material.Rate this question:
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- 27.
Collection line of a plumbing system is sometimes referred to as.
- A.
House Drain
- B.
House Sewer
- C.
House Sanitary Drainage
- D.
House Plumbing System
Correct Answer
A. House DrainExplanation
The collection line of a plumbing system is sometimes referred to as a "House Drain." This term is used to describe the pipe or system of pipes that collect wastewater from various fixtures and appliances within a house and transport it to the main sewer line or septic tank. The House Drain is an essential part of the plumbing system as it ensures the proper disposal of wastewater and prevents any potential backups or clogs within the house.Rate this question:
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- 28.
An assembly consisting of a pulley wheel, side plates, shaft, and bearings over which a cable or roped is passed.
- A.
Governor
- B.
Sheave
- C.
Weighing Device
- D.
Fascia Plate
Correct Answer
B. SheaveExplanation
A sheave is a component of an assembly that consists of a pulley wheel, side plates, shaft, and bearings over which a cable or rope is passed. It is used to change the direction or transmit power in a system. This explanation fits the given definition of a sheave and accurately describes its function.Rate this question:
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Feb 13, 2023Quiz Edited by
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Apr 29, 2009Quiz Created by
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