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

field

exciter

stator

armature

Question 1 of 25

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

sulfuric acid is consumed

sulfuric acid is produced

lead is consumed

water is consumed

Question 2 of 25

3. 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 ________.

legally required standby systems

emergency systems

essential systems

life safety systems

Question 3 of 25

4. 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 4 of 25

5. 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?

Emergency systems

Nonessential systems

Optional standby systems

Critical systems

Question 5 of 25

6. Transfer switches are sized based on ________.

80% of the generator capacity

125% of the maximum critical load

150% of the emergency load

the calculated continuous current

Question 6 of 25

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

Life safety systems

Fire alarm systems

Computer equipment

Exit lights

Question 7 of 25

8. Overcharging a lead-acid battery will ________.

destroy the negative plate

destroy the positive plate

increase battery power

extend battery life

Question 8 of 25

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

2.5V

2.0V

1.3V

1.0V

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 inverter

static uninterruptible power supply

generator set

Question 10 of 25

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

reduced by 15%

increased by 20%

reduced by 20%

reduced by 50%

Question 11 of 25

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

1 hour

10 minutes

5 minutes

15 minutes

Question 12 of 25

13. 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

one circuit from the normal electrical system only

at least two branch circuits from the emergency system

Question 13 of 25

14. 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

0.75

1.50

0.30

Question 14 of 25

15. 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%

100%

50%

Question 15 of 25

16. NEC Article 518 contains ________.

information on transfer switches

requirements for places of assembly

requirements for unit equipment

information on the installation of emergency systems

Question 16 of 25

17. NEC Article 480 contains ________.

installation requirements for legally required standby electrical systems

information on transfer switches

requirements for unit equipment

requirements governing storage batteries for emergency electrical systems

Question 17 of 25

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

a mounted radiator with an engine-driven fan

liquid-to-liquid heat exchangers

compressed air systems

battery-powered systems

Question 18 of 25

19. Battery capacity can be determined by ________.

using a hydrometer

performing a load test

calculating electrolyte specific gravity

performing a float test

Question 19 of 25

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

typically done using manufacturer's software

detailed in NEC Article 701

achieved by referring to tables in local building codes

based on calculations using NFPA guidelines

Question 20 of 25

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

Air-cooled

Diesel-powered

Liquid-cooled

LP gas-powered

Question 21 of 25

22. A single-conversion UPS system ________.

may achieve zero transfer time

supplies AC power directly to critical loads through a series transformer

has poor noise isolation from line to load

has excellent frequency stability

Question 22 of 25

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

rotor

stator

exciter

armature

Question 23 of 25

24. Optional standby systems are covered in ________.

NEC Article 701

NEC Article 702

NEC Article 700

NEC Article 705

Question 24 of 25

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

12V or 28V

14V or 22V

10V or 20V

12V or 24V

Question 25 of 25

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