Building Utilities 08
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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.
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Microwave
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Passive Infrared with Ultrasonic (or Microwave)
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Proximity / Capacitance
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Ultrasonic
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Explore key aspects of building utilities focusing on security systems like perimeter detectors and lighting technologies including various lamp types.
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- 2.
This type of perimeter detector uses both the Passive infrared and Ultrasonic or Microwave system.
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Microwave
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Passive Infrared with Ultrasonic (or Microwave)
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Proximity / Capacitance
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Ultrasonic
Correct Answer
A. Passive Infrared with Ultrasonic (or Microwave)Explanation
Passive Infrared with Ultrasonic (or Microwave) is the correct answer because this type of perimeter detector combines the use of both Passive Infrared (PIR) and Ultrasonic or Microwave systems. The Passive Infrared system detects changes in infrared radiation, such as body heat, while the Ultrasonic or Microwave system uses sound waves or electromagnetic waves to detect movement. By combining these two systems, 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.
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Microwave
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Passive Infrared with Ultrasonic (or Microwave)
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Proximity / Capacitance
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Ultrasonic
Correct Answer
A. Proximity / CapacitanceExplanation
A proximity/capacitance perimeter detector is able to detect intrusion by detecting a change in capacitance in the area it covers. When an intruder enters the area, the capacitance changes, triggering the detector. This type of detector does not rely on microwave or ultrasonic technology, but rather on changes in capacitance.Rate this question:
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- 4.
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.
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Mercury Lamp
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Metal Halide Lamp
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Tungsten Halogen Lamp
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High-Pressure-Sodium (HPS)
Correct Answer
A. Metal Halide LampExplanation
A metal halide lamp is a type of high intensity discharge lamp that produces light through the radiation of a mixture of metallic vapor. This type of lamp is similar in construction to a mercury lamp, but the metallic vapor used in a metal halide lamp is different. Metal halide lamps are known for their high light output, efficient energy usage, and long lifespan. They are commonly used in outdoor lighting, stadium lighting, and aquarium lighting.Rate this question:
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- 5.
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.
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Mercury Lamp
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Metal Halide Lamp
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Tungsten Halogen Lamp
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High-Pressure-Sodium (HPS)
Correct Answer
A. Mercury LampExplanation
Mercury lamps are a type of lamp that is commonly used for lighting commercial interiors. These lamps use argon gas to facilitate the starting process. Once started, they produce light through an electric discharge in mercury vapor.Rate this question:
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- 6.
A type of lamp which produces light by means of the reaction of halogen additive in the bulb reacts with chemically with tungsten.
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Mercury Lamp
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Metal Halide Lamp
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Tungsten Halogen Lamp
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High-Pressure-Sodium (HPS)
Correct Answer
A. Tungsten Halogen LampExplanation
A tungsten halogen lamp produces light by the reaction of a halogen additive in the bulb with tungsten. This reaction helps to recycle the tungsten, preventing it from evaporating and depositing on the inside of the bulb, which would cause the bulb to darken and reduce its lifespan. The halogen additive helps to redeposit the tungsten back onto the filament, extending the life of the bulb. This type of lamp is commonly used in applications where a bright, white light is needed, such as in photography or stage lighting.Rate this question:
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- 7.
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.
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Safety Shoe
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Weighing Device
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Fascia Plate
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Handrail Guard
Correct Answer
A. Safety ShoeExplanation
A safety shoe is a device that is used in elevators to detect obstacles during the door closing process. It works in conjunction with a photocell to ensure that if there is something in the way of the closing doors, they will reopen to prevent any potential accidents or injuries. The safety shoe is an important component of elevator safety systems and helps to protect passengers and objects from being caught in the closing doors.Rate this question:
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- 8.
In elevator, it makes the buzzer alarm when the car is overloaded and the door remains open until overloading is eliminated.
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Weighing Device
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Handrail Guard Switches
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Fascia Plate
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Sheave
Correct Answer
A. Weighing DeviceExplanation
The correct answer is "Weighing Device". In an elevator, a weighing device is used to determine the weight of the passengers and objects inside the car. When the car becomes overloaded, meaning it exceeds the maximum weight capacity, the weighing device triggers the buzzer alarm to alert the passengers and operators. The door remains open until the overloading is eliminated by removing some of the weight from the elevator car.Rate this question:
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- 9.
In elevator, it protects the equipment from over current.
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Circuit Breaker
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Handrail Guard Switches
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Limit Switches
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Disconnect Switch
Correct Answer
A. Circuit BreakerExplanation
A circuit breaker is a device that automatically interrupts the flow of electric current in a circuit when it detects an overload or a short circuit. In an elevator, a circuit breaker is used to protect the equipment from over current, which can be caused by excessive load or a fault in the electrical system. When the current exceeds a certain threshold, the circuit breaker trips and opens the circuit, preventing damage to the equipment and ensuring the safety of the elevator and its passengers.Rate this question:
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- 10.
In elevator, these prevent the excessive car travel at the highest and lowest floor.
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Circuit Breaker
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Handrail Guard Switches
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Limit Switches
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Disconnect Switch
Correct Answer
A. Limit SwitchesExplanation
Limit switches are devices used in elevators to prevent excessive travel of the car at the highest and lowest floors. They are designed to activate when the elevator reaches a specific point in its travel, signaling the control system to stop the car. This helps to ensure the safety of passengers and prevent any damage to the elevator system. Circuit breakers, handrail guard switches, and disconnect switches are not specifically designed for this purpose and do not provide the same level of protection against excessive travel.Rate this question:
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- 11.
In escalators, these stop the escalator if a foreign object becomes wedged at the guard.
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Circuit Breaker
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Handrail Guard Switches
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Limit Switches
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Disconnect Switch
Correct Answer
A. Handrail Guard SwitchesExplanation
Handrail Guard Switches are designed to stop the escalator if a foreign object becomes wedged at the guard. These switches are specifically installed to ensure the safety of passengers by preventing any accidents or injuries that may occur due to objects getting stuck in the handrail guard. When the switches detect an obstruction, they immediately stop the escalator, preventing any further movement and potential harm.Rate this question:
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- 12.
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.
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Circuit Breaker
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Handrail Guard Switches
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Limit Switches
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Disconnect Switch
Correct Answer
A. Disconnect SwitchExplanation
The disconnect switch is located at the bottom truss of the escalator and is used to stop or prevent the escalator from starting during maintenance service. It has on and off positions, allowing the escalator to be easily disconnected from its power source when necessary. This ensures the safety of maintenance workers and prevents any accidental start-up of the escalator while maintenance is being performed.Rate this question:
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- 13.
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.
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Mechanical Maintenance Locking Device
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Disconnect Switch
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Knife Switch
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Limit Switches
Correct Answer
A. Mechanical Maintenance Locking DeviceExplanation
The correct answer is Mechanical Maintenance Locking Device. This device is provided at the drive unit location in escalators to prevent accidental movement of the escalator during inspections or maintenance. It ensures the safety of maintenance personnel by securely locking the escalator in place.Rate this question:
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- 14.
This device, in escalators, stops the escalator automatically if an abnormal current is supplied to the motor.
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Disconnect Switch
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Knife Switch
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Limit Switches
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Current Overload Safety Switch
Correct Answer
A. Current Overload Safety SwitchExplanation
A current overload safety switch is a device in escalators that is designed to automatically stop the escalator if an abnormal current is supplied to the motor. This switch acts as a safety measure to prevent damage to the motor or any other components of the escalator due to excessive current flow. When the switch detects an abnormal current, it interrupts the power supply to the motor, causing the escalator to stop and prevent any further damage or accidents.Rate this question:
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- 15.
This switch cuts off all current supply to the escalator for inspection, maintenance, or repairs.
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Disconnect Switch
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Knife Switch
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Limit Switches
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Current Overload Safety Switch
Correct Answer
A. Knife SwitchExplanation
A knife switch is a type of switch that is used to cut off the current supply to a device or equipment. It is commonly used for inspection, maintenance, or repairs, as it provides a quick and easy way to disconnect the power source. In the context of the given question, a knife switch would be the most suitable option as it allows for the complete cutoff of current supply to the escalator for inspection, maintenance, or repairs.Rate this question:
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- 16.
In a lightning protection system, the combination of a metal rod and its brace or footing, on the upper part of a structure.
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Ground Rod
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Air Terminal
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Lightning Rod
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Protective Assembly
Correct Answer
A. Air TerminalExplanation
An air terminal is the correct answer because it refers to the combination of a metal rod and its brace or footing that is installed on the upper part of a structure as part of a lightning protection system. The air terminal is designed to attract and capture lightning strikes, providing a path for the electrical current to safely travel into the ground, thus protecting the structure from damage.Rate this question:
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- 17.
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.
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Teflon
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Solvent
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O-ring
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Adhesive
Correct Answer
A. TeflonExplanation
Teflon is the correct answer because it is a type of plastic that was developed in 1938 by DuPont. It is known for being white, soft, waxy, and non-adhesive. Teflon is made from the polymer of tetrafluoroethylene, which gives it its unique properties.Rate this question:
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- 18.
The number of cycles per unit time of a wave or oscillations expressed in hertz of cycles per second.
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Wavelength
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Frequency
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Sine Wave
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Sound Wave
Correct Answer
A. FrequencyExplanation
Frequency refers to the number of cycles or oscillations that occur in a wave per unit time. It is measured in hertz, which represents the number of cycles per second. In other words, frequency determines how many complete waves pass a given point in a specific time period. It is a fundamental property of waves and is used to describe various types of waves, including sound waves and sine waves.Rate this question:
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- 19.
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.
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Transmission Loss
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Audible Transmission
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Sabin
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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.Rate this question:
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- 20.
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)
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Ton of Refrigeration
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HP of Refrigeration
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Ton of Ventilation
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HP of Ventilation
Correct Answer
A. Ton of RefrigerationExplanation
The cooling effect obtained when 1 ton of ice at 32 oF (0 oC) melts to water at the same temperature in 24 hrs is referred to as "Ton of Refrigeration." This term is used to measure the cooling capacity of a refrigeration system. It represents the amount of heat that needs to be removed in order to convert one ton of ice into water at the same temperature in a 24-hour period.Rate this question:
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- 21.
Which statement is not true?
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Cleanouts may be omitted on a horizontal drain less than 1.5 meters in length unless such line is serving sinks or urinals.
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No galvanized wrought iron or galvanized steel pipe shall be used underground and shall be kept at least 15 cms above ground.
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1 3/4" diameter is 'not' a commercial size of G.I. Pipe for water supply.
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3" diameter is 'not' a commercial size of G.I. Pipe for water supply.
Correct Answer
A. 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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- 22.
Which statement is not true?
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Number of fixture unit is one parameter in sizing a drainage pipe.
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Brass and cast iron body cleanouts shall not be used as a reducer or adapter.
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60Ëš branches or offsets may be used only when installed in a true vertical positio
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Wooden septic tanks are allowed.
Correct Answer
A. 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.Rate this question:
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- 23.
TW in electrical wire specification means.
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Moisture and Heat Resistant- Cross-Linked Thermosetting
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Moisture resistant, in wet and dry location
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Heat Resistant in wet and dry location
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Moisture Resistant Cross-Linked Thermosetting
Correct Answer
A. Moisture resistant, in wet and dry locationExplanation
The correct answer is "Moisture Resistant Cross-Linked Thermosetting." This means that the electrical wire is designed to withstand moisture in both wet and dry locations. The wire is made from a cross-linked thermosetting material that provides additional resistance to moisture. This ensures that the wire remains safe and functional even in environments where there is a potential for moisture exposure.Rate this question:
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- 24.
XHHN in wire specification means.
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Moisture and Heat Resistant- Cross-Linked Thermosetting
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Moisture resistant, in wet and dry location
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Heat Resistant in wet and dry location
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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 is because the acronym "XHHN" in wire specification stands for a wire that is both moisture and heat resistant, and is made of cross-linked thermosetting material.Rate this question:
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- 25.
Collection line of a plumbing system is sometimes referred to as.
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House Drain
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House Sewer
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House Sanitary Drainage
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House Plumbing System
Correct Answer
A. House DrainExplanation
The collection line of a plumbing system is sometimes referred to as the "House Drain." This term is used to describe the pipe or pipes that collect wastewater from various fixtures within a house and carry it to the main sewer line or septic system. The house drain is an essential component of the plumbing system as it ensures the proper disposal of wastewater and prevents any potential backups or clogs.Rate this question:
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- 26.
An assembly consisting of a pulley wheel, side plates, shaft, and bearings over which a cable or roped is passed.
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Governor
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Sheave
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Weighing Device
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Fascia Plate
Correct Answer
A. 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.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
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Mar 19, 2009Quiz Created by
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