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1. 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 1 of 25

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

33-1/3%

50%

87-1/2%

100%

Question 2 of 25

3. Optional standby systems are covered in ________.

NEC Article 701

NEC Article 700

NEC Article 702

NEC Article 705

Question 3 of 25

4. 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 ________.

life safety systems

legally required standby systems

emergency systems

essential systems

Question 4 of 25

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

14V or 22V

12V or 28V

12V or 24V

10V or 20V

Question 5 of 25

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

exciter

armature

stator

rotor

Question 6 of 25

7. NEC Article 518 contains ________.

information on the installation of emergency systems

information on transfer switches

requirements for places of assembly

requirements for unit equipment

Question 7 of 25

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

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

one circuit from the emergency system only

at least two branch circuits from the emergency system

Question 8 of 25

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

lead is consumed

water is consumed

sulfuric acid is produced

sulfuric acid is consumed

Question 9 of 25

10. NEC Article 480 contains ________.

installation requirements for legally required standby electrical systems

requirements governing storage batteries for emergency electrical systems

information on transfer switches

requirements for unit equipment

Question 10 of 25

11. 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 11 of 25

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

battery-powered systems

a mounted radiator with an engine-driven fan

compressed air systems

liquid-to-liquid heat exchangers

Question 12 of 25

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

5 minutes

10 minutes

15 minutes

1 hour

Question 13 of 25

14. 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?

Critical systems

Nonessential systems

Emergency systems

Optional standby systems

Question 14 of 25

15. Transfer switches are sized based on ________.

the calculated continuous current

150% of the emergency load

125% of the maximum critical load

80% of the generator capacity

Question 15 of 25

16. A single-conversion UPS system ________.

has excellent frequency stability

supplies AC power directly to critical loads through a series transformer

has poor noise isolation from line to load

may achieve zero transfer time

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?

1.50

0.30

3.00

0.75

Question 17 of 25

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

reduced by 50%

reduced by 20%

reduced by 15%

increased by 20%

Question 18 of 25

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

detailed in NEC Article 701

based on calculations using NFPA guidelines

achieved by referring to tables in local building codes

typically done using manufacturer's software

Question 19 of 25

20. Overcharging a lead-acid battery will ________.

destroy the positive plate

extend battery life

increase battery power

destroy the negative plate

Question 20 of 25

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

Computer equipment

Life safety systems

Fire alarm systems

Exit lights

Question 21 of 25

22. 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) ________.

static inverter

static uninterruptible power supply

transfer switch system

generator set

Question 22 of 25

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

field

stator

armature

exciter

Question 23 of 25

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

2.5V

1.3V

1.0V

2.0V

Question 24 of 25

25. Battery capacity can be determined by ________.

using a hydrometer

calculating electrolyte specific gravity

performing a float test

performing a load test

Question 25 of 25

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