TAP Services

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

Life safety systems

Fire alarm systems

Exit lights

Computer equipment

Question 1 of 25

2. Optional standby systems are covered in ________.

NEC Article 705

NEC Article 701

NEC Article 702

NEC Article 700

Question 2 of 25

3. 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%

87-1/2%

100%

50%

Question 3 of 25

4. Battery capacity can be determined by ________.

calculating electrolyte specific gravity

performing a load test

performing a float test

using a hydrometer

Question 4 of 25

5. 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?

0.30

1.50

3.00

0.75

Question 5 of 25

6. NEC Article 480 contains ________.

requirements for unit equipment

information on transfer switches

installation requirements for legally required standby electrical systems

requirements governing storage batteries for emergency electrical systems

Question 6 of 25

7. Overcharging a lead-acid battery will ________.

destroy the negative plate

extend battery life

increase battery power

destroy the positive plate

Question 7 of 25

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

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.

A means of manual starting must be provided.

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 ________.

life safety systems

legally required standby systems

essential systems

emergency systems

Question 9 of 25

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

armature

rotor

stator

exciter

Question 10 of 25

11. 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 11 of 25

12. 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

Critical systems

Optional standby systems

Nonessential systems

Question 12 of 25

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

15 minutes

5 minutes

10 minutes

1 hour

Question 13 of 25

14. 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 14 of 25

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

12V or 24V

10V or 20V

14V or 22V

12V or 28V

Question 15 of 25

16. 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 16 of 25

17. A single-conversion UPS system ________.

has poor noise isolation from line to load

has excellent frequency stability

may achieve zero transfer time

supplies AC power directly to critical loads through a series transformer

Question 17 of 25

18. NEC Article 518 contains ________.

requirements for places of assembly

information on the installation of emergency systems

information on transfer switches

requirements for unit equipment

Question 18 of 25

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

sulfuric acid is produced

sulfuric acid is consumed

lead is consumed

water is consumed

Question 19 of 25

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

reduced by 20%

reduced by 50%

increased by 20%

reduced by 15%

Question 20 of 25

21. 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 uninterruptible power supply

static inverter

transfer switch system

Question 21 of 25

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

2.5V

1.3V

1.0V

2.0V

Question 22 of 25

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

armature

exciter

stator

field

Question 23 of 25

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

Liquid-cooled

Air-cooled

Diesel-powered

LP gas-powered

Question 24 of 25

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

based on calculations using NFPA guidelines

typically done using manufacturer's software

detailed in NEC Article 701

achieved by referring to tables in local building codes

Question 25 of 25

Mailing List

Quick Nav

TAP Services

	FOLLOW US ON SOCIAL MEDIA

TAP Services

Mailing List

Quick Nav

Get Social

TAP Services