Question 1

What are the advantages of proper bonding and grounding?

Accepted Answer

The advantages of proper bonding and grounding include: 
 ∙ The potential voltage differentials between the different parts of the system are kept at a minimum, thereby reducing shock hazard. 
∙ Impedance of a ground path is kept at a minimum, which results in higher current flow in the event of a ground fault. The lower the impedance, the greater is the current flow, and the faster the overcurrent device opens.

Question 2

NEC  230.71 permits not more than ____ disconnects to serve as the building disconnecting means.

Accepted Answer

A) 6 
B) 10 
C) 14 
D) 18 
A) 6 
B) 10 
C) 14 
D) 18 A

Question 3

The lower (or shorter)the ____ of the grounding path, the greater the ground-fault current.

Accepted Answer

A) length 
B) elevation 
C) magnetic permeability 
D) impedance 
A) length 
B) elevation 
C) magnetic permeability 
D) impedance D

Question 4

What is an effective ground-fault current path?

Accepted Answer

​ 
 An effective ground-fault current pa

Question 5

Today's liquid-filled transformers have their windings immersed in highly refined mineral oil (combustible), silicone fluid, edible seed oil-based dielectric coolant, or other acceptable nontoxic liquids that have ____ properties.

Accepted Answer

A) high dielectric 
B) high conductance 
C) low dielectric 
D) photoactive 
A) high dielectric 
B) high conductance 
C) low dielectric 
D) photoactive

Question 6

GFPE monitors are designed to sense ____ faults only.

Accepted Answer

A) phase-to-phase 
B) phase-to-ground 
C) 3-phase 
D) phase-to-neutral 
A) phase-to-phase 
B) phase-to-ground 
C) 3-phase 
D) phase-to-neutral

Question 7

____ occur when an ungrounded "hot" conductor comes in contact with a grounded surface or grounded equipment.

Accepted Answer

A) Circuit breakings 
B) Ground faults 
C) Open circuits 
D) Arc blasts 
A) Circuit breakings 
B) Ground faults 
C) Open circuits 
D) Arc blasts

Question 8

The temperatures of an electrical arc, such as might occur on a 480/277-volt solidly grounded, wye-connected system, are ____.

Accepted Answer

A) at the boiling point of water 
B) not hot enough to melt metals 
C) safe for humans 
D) hotter than the surface of the sun 
A) at the boiling point of water 
B) not hot enough to melt metals 
C) safe for humans 
D) hotter than the surface of the sun

Question 9

In this country and throughout the world, ____ is(are)the common reference point for all electrical systems.

Accepted Answer

A) the atmosphere 
B) a standard metal plate 
C) the earth 
D) individual building walls 
A) the atmosphere 
B) a standard metal plate 
C) the earth 
D) individual building walls

Question 10

The ____ is defined in NEC  Article 100 as the point of connection between the facilities of the serving utility and the premises wiring .

Accepted Answer

A) open delta 
B) singular phase 
C) service point 
D) transformer 
A) open delta 
B) singular phase 
C) service point 
D) transformer

Question 11

When is ground-fault protection of equipment not required?

Accepted Answer

Ground-fault protection of equipment is

Question 12

NEC  110.16 has a requirement for placing a notice on certain equipment to warn qualified persons of the serious hazard of ____ flash events.

Accepted Answer

A) arc 
B) current 
C) lightning 
D) voltage 
A) arc 
B) current 
C) lightning 
D) voltage

Question 13

Utilities make up the connections on the line side and load side of their transformers according to the ____ requirements.

Accepted Answer

A) NFPA 
B) NESC 
C) TEK 
D) UL 
A) NFPA 
B) NESC 
C) TEK 
D) UL

Question 14

What liquid was used in the past in liquid-filled transformers? Is it still in use?

Accepted Answer

Years ago, the most widely used liquid w

Question 15

Dry-type transformers are widely used because they are ____ than comparably rated liquid-filled transformers.

Accepted Answer

A) better dielectrics 
B) better conductors 
C) heavier in weight 
D) lighter in weight 
A) better dielectrics 
B) better conductors 
C) heavier in weight 
D) lighter in weight

Question 16

The ____ connection scheme has the advantage of being able to provide either 3-phase or 3-phase and single-phase power using only two transformers.

Accepted Answer

A) three-wire delta 
B) 4-wire wye 
C) open delta 
D) single-phase 
A) three-wire delta 
B) 4-wire wye 
C) open delta 
D) single-phase

Question 17

The two basic methods of metering are primary high-voltage metering and ____.

Accepted Answer

A) intermediate-voltage metering 
B) pulsed metering 
C) secondary high-voltage metering 
D) low-voltage metering 
A) intermediate-voltage metering 
B) pulsed metering 
C) secondary high-voltage metering 
D) low-voltage metering

Question 18

NEC 250.64(C)states that grounding electrode conductors generally are not permitted to be ____.

Accepted Answer

A) stranded 
B) spliced 
C) covered 
D) integrated 
A) stranded 
B) spliced 
C) covered 
D) integrated

Question 19

When and how does primary high-voltage metering take place?

Accepted Answer

When a commercial building is occupied b

Question 20

GFCI protection can be attained using GFCI circuit breakers or GFCI ____.

Accepted Answer

A) switchboards 
B) monitors 
C) receptacles 
D) panelboards 
A) switchboards 
B) monitors 
C) receptacles 
D) panelboards

Exam 14: Lamps and Ballasts for Lighting

What are the advantages of proper bonding and grounding?

NEC 230.71 permits not more than ____ disconnects to serve as the building disconnecting means.

The lower (or shorter)the ____ of the grounding path, the greater the ground-fault current.

What is an effective ground-fault current path?

Today's liquid-filled transformers have their windings immersed in highly refined mineral oil (combustible), silicone fluid, edible seed oil-based dielectric coolant, or other acceptable nontoxic liquids that have ____ properties.

GFPE monitors are designed to sense ____ faults only.

____ occur when an ungrounded "hot" conductor comes in contact with a grounded surface or grounded equipment.

The temperatures of an electrical arc, such as might occur on a 480/277-volt solidly grounded, wye-connected system, are ____.

In this country and throughout the world, ____ is(are)the common reference point for all electrical systems.

The ____ is defined in NEC Article 100 as the point of connection between the facilities of the serving utility and the premises wiring .

When is ground-fault protection of equipment not required?

NEC 110.16 has a requirement for placing a notice on certain equipment to warn qualified persons of the serious hazard of ____ flash events.

Utilities make up the connections on the line side and load side of their transformers according to the ____ requirements.

What liquid was used in the past in liquid-filled transformers? Is it still in use?

Dry-type transformers are widely used because they are ____ than comparably rated liquid-filled transformers.

The ____ connection scheme has the advantage of being able to provide either 3-phase or 3-phase and single-phase power using only two transformers.

The two basic methods of metering are primary high-voltage metering and ____.

NEC 250.64(C)states that grounding electrode conductors generally are not permitted to be ____.

When and how does primary high-voltage metering take place?

GFCI protection can be attained using GFCI circuit breakers or GFCI ____.

Commercial Building Plans and Specifications

Reading Electrical Working Drawings--Entry Level

General Requirements for Conductors

Branch Circuits

Switches and Receptacles

Wiring Methods

Motor and Appliance Circuits

Feeder Installation and Load Calculation

Special Systems

Working Drawings--Upper Level

Special Circuits Owners Circuits

Panelboard Selection and Installation

The Electric Service and Grounding

Luminaires

Emergency, Legally Required Standby, and Optional Standby Power Systems

Overcurrent Protection: Fuses and Circuit Breakers

Short-Circuit Calculations and Coordination of Overcurrent Protective Devices

Equipment and Conductor Short-Circuit

Low-Voltage Remote Control

The Cooling System

Commercial Utility-Interactive Photovoltaic Systems

Filters