Question 1

If two motors are to be started at the same time, the standby power system must have the capacity to provide the of the starting kilovolt-ampere values for the two motors.&#10;A)higher&#10;B)lower&#10;C)product&#10;D)sum

Accepted Answer

The standby power system must have the capacity to provide the sum of the starting kilovolt-ampere values for the two motors.

Question 2

power supply (UPS) systems are often installed to provide &#34;clean power&#34; to critical loads such as computers.&#10;A)Uninterruptible&#10;B)Unitary&#10;C)UNIX&#10;D)Unconditional

Accepted Answer

Uninterruptible Power Supply (UPS) systems provide backup power and "clean" electrical power to critical loads in the event of a power outage or other power disturbance. This helps protect expensive and sensitive equipment such as computers from damage due to power fluctuations or surges. Unitary and UNIX are not related to power supply systems. Unconditional power supply is not a commonly used term.

Question 3

According to NEC 110.9, switches and fuses must have a(n) capacity not less than the available short-circuit current at their supply terminals.&#10;A)partial&#10;B)total&#10;C)interrupting&#10;D)generating

Accepted Answer

NEC 110.9 states that switches and fuses must have an interrupting capacity, which refers to their ability to safely interrupt the flow of current in the event of a short-circuit. The interrupting capacity must be not less than the available short-circuit current at their supply terminals. Therefore, choice C, interrupting, is the best answer.

Question 4

Generators must be oversized when supplying loads to reduce heating and voltage waveform distortion.&#10;A)linear&#10;B)nonlinear&#10;C)resistive&#10;D)oscillating

Accepted Answer

Nonlinear loads can cause voltage waveform distortion and increase the heating of the generator. Therefore, generators supplying nonlinear loads should be oversized. Linear and resistive loads do not cause significant heating or waveform distortion. Oscillating loads are not a well-defined category and do not provide enough information to give a clear answer.

Question 5

The main purpose of a(n) system is to automatically come on to supply, distribute, and control power and illumination essential for safety to human life in the event that the normal supply of power is interrupted.

A)emergency
B)legally required standby
C)optional standby
D)overcurrent

Accepted Answer

An emergency system is designed to automatically come on in the event of a power outage to provide power and illumination essential for safety to human life. Legally required standby systems are also required to automatically come on, but they do not necessarily provide power specifically for safety reasons. Optional standby systems are not required by code and are used as a secondary source of power. Overcurrent refers to the protection of an electrical circuit from excessive current.

Question 6

According to NEC 700.6(A), a(n) is required for emergency systems to consist of a signal device having both audible and visual alarms.&#10;A)emergency siren&#10;B)legally required standby&#10;C)derangement signal&#10;D)alarm composite

Accepted Answer

NEC 700.6(A) specifies that emergency systems must include a derangement signal, which provides both audible and visual alarms to indicate system malfunctions.

Question 7

Manufacturers of generators, transfer switches, and signaling devices also provide panelboards that have the built right into the panelboard.This is a nice feature for those installations where one panelboard is to serve the emergency or standby power requirements.

A)alternators
B)emergency circuit
C)transfer switch
D)voltage switch

Accepted Answer

Manufacturers of transfer switches provide panelboards with the transfer switch built right into the panelboard which is a nice feature for those installations where one panelboard is to serve the emergency or standby power requirements.

Question 8

What is a legally required standby system?

Accepted Answer

The answer of What is a legally required standby system?...

Question 9

The starting kilovolt-amperes for a motor is equivalent to the kilovolt-amperes of the motor.&#10;A)locked-rotor&#10;B)stator&#10;C)armature&#10;D)rectified

Accepted Answer

The starting kilovolt-amperes of a motor is equivalent to the kilovolt-amperes of the motor at its locked-rotor state. This is because the locked-rotor state is the condition where the motor is not able to rotate at all, and is drawing the maximum current possible, which results in the highest kilovolt-ampere value. Therefore, the correct choice is A) locked-rotor.

Question 10

In a typical branch-circuit installation for an emergency system, -operated switches are installed to prevent unauthorized personnel from operating the luminaires.&#10;A)fingerprint&#10;B)voice&#10;C)light&#10;D)key

Accepted Answer

Key-operated switches are commonly used in emergency system installations to prevent unauthorized personnel from operating the luminaires. This ensures that the emergency lighting system is only used in the event of an actual emergency, and not for any other purposes. Fingerprint and voice-operated switches are less commonly used due to higher costs and potential reliability issues. Light-operated switches may not be reliable in all circumstances, such as in areas with varying light levels or during power outages.

Question 11

NEC 701.12(E) the connection for a legally required standby system to be made ahead of, but not within, the main service disconnect.&#10;A)mandates&#10;B)disallows&#10;C)permits&#10;D)discourages

Accepted Answer

The answer of NEC 701.12(E) the connection for a legally...

Question 12

When are self-contained emergency power systems used?

Accepted Answer

The answer of When are self-contained emergency power systems used?...

Question 13

Many types of healthcare facilities are covered in NEC Article 517.generally have the most stringent requirements, and clinics and medical and dental offices have the least stringent requirements.&#10;A)Hospitals&#10;B)Psychiatric facilities&#10;C)Nursing homes&#10;D)Ambulatory care centers

Accepted Answer

The answer of Many types of healthcare facilities are covered...

Question 14

What is the mechanism behind the generation of backfeed?

Accepted Answer

The answer of What is the mechanism behind the generation...

Question 15

Why is it important to accurately determine the capacity of a power system?

Accepted Answer

The answer of Why is it important to accurately determine...

Question 16

Fuels that may be used in an emergency generator are LPG (liquid propane) gas, natural gas, gasoline, or .&#10;A)fusel&#10;B)diesel fuel&#10;C)ethanol&#10;D)kerosene

Accepted Answer

The answer of Fuels that may be used in an...

Question 17

There have been many injuries and deaths as a result of &#894; it has been called &#34;the Hidden Killer.&#34;&#10;A)backfeed&#10;B)harmonic current&#10;C)triplens&#10;D)overcurrent

Accepted Answer

The answer of There have been many injuries and deaths...

Question 18

What are the advantages and disadvantages of selecting diesel fuel engines?

Accepted Answer

The answer of What are the advantages and disadvantages of...

Question 19

Generator units having a capacity greater than 15 kilowatts generally use cooling.&#10;A)LP gas&#10;B)air&#10;C)liquid&#10;D)no

Accepted Answer

The answer of Generator units having a capacity greater than...

Question 20

The Life Safety Code is another name for .&#10;A)NFPA 99&#10;B)NFPA 101&#10;C)NFPA 110&#10;D)IEEE 446

Accepted Answer

The answer of The Life Safety Code is another name...

Deck 16: Emergency, Legally Required Sstandby, and Optional Standby Power Systems