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1. 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

LP gas-powered

Diesel-powered

Liquid-cooled

Question 1 of 25

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

1.0V

2.0V

1.3V

2.5V

Question 2 of 25

3. Battery capacity can be determined by ________.

calculating electrolyte specific gravity

performing a load test

using a hydrometer

performing a float test

Question 3 of 25

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

battery-powered systems

liquid-to-liquid heat exchangers

a mounted radiator with an engine-driven fan

compressed air systems

Question 4 of 25

5. Optional standby systems are covered in ________.

NEC Article 700

NEC Article 705

NEC Article 702

NEC Article 701

Question 5 of 25

6. A single-conversion UPS system ________.

has excellent frequency stability

may achieve zero transfer time

supplies AC power directly to critical loads through a series transformer

has poor noise isolation from line to load

Question 6 of 25

7. 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) ________.

generator set

static inverter

static uninterruptible power supply

transfer switch system

Question 7 of 25

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

100%

87-1/2%

33-1/3%

50%

Question 8 of 25

9. 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 9 of 25

10. 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

Critical systems

Emergency systems

Optional standby systems

Question 10 of 25

11. 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 11 of 25

12. NEC Article 518 contains ________.

requirements for places of assembly

information on transfer switches

information on the installation of emergency systems

requirements for unit equipment

Question 12 of 25

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

A means of manual starting must be provided.

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

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

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

Question 13 of 25

14. NEC Article 480 contains ________.

requirements governing storage batteries for emergency electrical systems

installation requirements for legally required standby electrical systems

requirements for unit equipment

information on transfer switches

Question 14 of 25

15. 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 15 of 25

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

one circuit from the normal electrical system only

one circuit from the emergency system only

at least two branch circuits from the emergency system

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

Question 16 of 25

17. 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 17 of 25

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

12V or 24V

12V or 28V

14V or 22V

10V or 20V

Question 18 of 25

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

Computer equipment

Exit lights

Life safety systems

Fire alarm systems

Question 19 of 25

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

based on calculations using NFPA guidelines

detailed in NEC Article 701

typically done using manufacturer's software

achieved by referring to tables in local building codes

Question 20 of 25

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

5 minutes

15 minutes

10 minutes

1 hour

Question 21 of 25

22. Overcharging a lead-acid battery will ________.

destroy the positive plate

increase battery power

extend battery life

destroy the negative plate

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

exciter

armature

field

stator

Question 24 of 25

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

lead is consumed

water is consumed

sulfuric acid is consumed

sulfuric acid is produced

Question 25 of 25

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