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1. Which of the following are defined by the NEC® as those systems intended to protect public or private facilities or property where life safety does not depend on the performance of the system?

Nonessential systems

Emergency systems

Optional standby systems

Critical systems

Question 1 of 25

2. Battery starter systems used with generator sets are usually ________.

12V or 28V

14V or 22V

10V or 20V

12V or 24V

Question 2 of 25

3. A single-conversion UPS system ________.

may achieve zero transfer time

has poor noise isolation from line to load

supplies AC power directly to critical loads through a series transformer

has excellent frequency stability

Question 3 of 25

4. Sizing of a generator set for a particular application is ________.

achieved by referring to tables in local building codes

detailed in NEC Article 701

typically done using manufacturer's software

based on calculations using NFPA guidelines

Question 4 of 25

5. NEC Article 518 contains ________.

information on the installation of emergency systems

requirements for unit equipment

information on transfer switches

requirements for places of assembly

Question 5 of 25

6. Which type of engine-driven AC generator is commonly used as a standby system because they have a longer life and require less maintenance?

Diesel-powered

Air-cooled

Liquid-cooled

LP gas-powered

Question 6 of 25

7. Which of the following commercial loads can be fed from a regular circuit rather than an emergency circuit?

Fire alarm systems

Exit lights

Life safety systems

Computer equipment

Question 7 of 25

8. For every 15° above 77°, the life of a lead-acid battery is ________.

increased by 20%

reduced by 50%

reduced by 20%

reduced by 15%

Question 8 of 25

9. Battery capacity can be determined by ________.

using a hydrometer

performing a load test

calculating electrolyte specific gravity

performing a float test

Question 9 of 25

10. An electronically controlled, solid-state power control system designed as an alternate source to provide regulated AC power to critical loads if the normal power system fails is commonly known as a(n) ________.

transfer switch system

static uninterruptible power supply

static inverter

generator set

Question 10 of 25

11. The most common method of cooling standby generator sets is ________.

a mounted radiator with an engine-driven fan

liquid-to-liquid heat exchangers

battery-powered systems

compressed air systems

Question 11 of 25

12. When a lead-acid battery is being discharged ________.

lead is consumed

water is consumed

sulfuric acid is produced

sulfuric acid is consumed

Question 12 of 25

13. Which of the following is a requirement for generator sets used in legally required standby systems?

The generator must carry at least 50% of the load.

The standby system generator set must be started within 30 minutes after a power failure.

A means of manual starting must be provided.

A means must be provided for automatic starting of the generator set(s).

Question 13 of 25

14. Transfer switches are sized based on ________.

the calculated continuous current

125% of the maximum critical load

150% of the emergency load

80% of the generator capacity

Question 14 of 25

15. Each patient bed location in a healthcare facility must be supplied by ________.

one circuit from the emergency system only

one or more circuits from the normal electrical system and one or more from the emergency system

at least two branch circuits from the emergency system

one circuit from the normal electrical system only

Question 15 of 25

16. The nominal open circuit voltage of a lead-acid cell is _____.

1.3V

1.0V

2.0V

2.5V

Question 16 of 25

17. NEC Article 480 contains ________.

requirements governing storage batteries for emergency electrical systems

installation requirements for legally required standby electrical systems

information on transfer switches

requirements for unit equipment

Question 17 of 25

18. The AC generator consists of a rotor and a(n) ________.

field

exciter

armature

stator

Question 18 of 25

19. In lower-power UPS applications, the double-conversion UPS typically requires a DC power supply how many times larger than the full-load rating of the UPS?

3.00

1.50

0.75

0.30

Question 19 of 25

20. Systems installed to protect loads such as communications, ventilation, or lighting systems that, when stopped, could create hazards or hamper rescue or fire-fighting operations are known as ________.

essential systems

life safety systems

emergency systems

legally required standby systems

Question 20 of 25

21. Optional standby systems are covered in ________.

NEC Article 705

NEC Article 701

NEC Article 700

NEC Article 702

Question 21 of 25

22. In an AC generator, the field windings are energized by the ________.

exciter

stator

rotor

armature

Question 22 of 25

23. Overcharging a lead-acid battery will ________.

destroy the negative plate

increase battery power

extend battery life

destroy the positive plate

Question 23 of 25

24. Do not run an engine generator set without a load for more than ________.

5 minutes

1 hour

15 minutes

10 minutes

Question 24 of 25

25. A storage battery must supply at least what percentage of the system voltage for the total load of circuits supplying legally required standby power?

87-1/2%

33-1/3%

50%

100%

Question 25 of 25

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