Question 1

All employees who are exposed to hazardous conditions such as falling objects, electrical hazards, or burns are required to wear ___________________________________ on the job site.

Accepted Answer

The answer of All employees who are exposed to hazardous...

Question 2

The amount of current that it takes to cause ventricular fibrillation is __________ milliamperes.

Accepted Answer

The answer of The amount of current that it takes...

Question 3

When an electric current arcs through the air, the temperature can reach as high as _______ degrees Fahrenheit.

Accepted Answer

The answer of When an electric current arcs through the...

Question 4

According to Ohm's law, a 120 volts banch circuit with a total circuit resistance of 15 ohms will have a current flow of ____________________ amps.

Accepted Answer

The answer of According to Ohm's law, a 120 volts...

Question 5

Scaffold planks must be secured and must extend over the end supports at least __________ inches but not more than __________ inches.

Accepted Answer

The answer of Scaffold planks must be secured and must...

Question 6

A straight or extension ladder should extend at least __________ above the top support when placed against a structure that is not as tall as the ladder.

Accepted Answer

A straight or extension ladder should extend at least 36 inches (3 feet) above the top support to ensure stability and safety when accessing a roof or platform.

Question 7

__________________________________________ are designed to inform a worker of a material's physical properties, its effects on health, the proper type and style of protective equipment needed when using the material, and the proper first aid treatment to be given when exposed to the material.

Accepted Answer

The answer of __________________________________________ are designed to inform a worker...

Question 8

Which of the following items is considered to be Personal Protective Equipment (PPE)?

Accepted Answer

All three items (safety glasses, hard hat, and work boots) are classified as Personal Protective Equipment (PPE) as they are specifically designed and worn to minimize exposure to various workplace hazards.

Question 9

Which of the following types of fire extinguishers should be used on electrical fires?

Accepted Answer

Carbon Dioxide and Dry Chemical extinguishers are suitable for electrical fires as they do not conduct electricity and can safely extinguish the fire without damaging electrical equipment.

Question 10

Dry chemical fire extinguishers can be used on Class __________ fires.

Accepted Answer

Dry chemical fire extinguishers can be used on Class A, B, and C fires. Thus, option D, 'All of the above', is the best choice.

Question 11

A dangerous condition associated with the possible release of energy caused by an electric arc is called a/an __________.

Accepted Answer

An arc-flash is a dangerous condition associated with the possible release of energy caused by an electric arc. An arc-flash is a sudden release of electrical energy through the air when a high-voltage gap exists and there is a breakdown between conductors. This can result in an explosion, fire, or flying debris, causing severe burns, injuries, or even fatalities. The other options, such as arc blast, electrical hazard, or volt, are not precise or comprehensive enough to describe the specific danger of an electric arc release.

Question 12

Changes to the National Electrical Code from the previous edition are indicated by grey highlighting or a __________ beside the table or figure in which the change has occurred.

Accepted Answer

Changes to the National Electrical Code are indicated by a vertical solid line beside the table or figure where the change has occurred.

Question 13

Fires that occur in or near electrical equipment such as motors, switchboards, and electrical wiring are classified as Class __________ fires.

Accepted Answer

Class C fires involve electrical equipment and require non-conductive extinguishing agents to safely put them out.

Question 14

A(n) ____________ is defined as a device intended to provide protection from the effects of arc faults and to de-energize a circuit when an arc fault is detected.

Accepted Answer

Arc-fault circuit-interrupters (AFCIs) are specifically designed to protect against arc faults, which are a leading cause of electrical fires in homes. AFCIs monitor the electrical current within a circuit and detect any abnormal arcing conditions that may occur. When an arc fault is detected, the AFCI will immediately de-energize the circuit, preventing any potential fires or damage. Ground-fault circuit-interrupters (GFCIs) are designed to protect against ground faults and do not offer the same level of protection against arc faults. Circuit breakers and fuses also do not provide the same level of arc fault protection as AFCIs.

Question 15

When placing a straight or extension ladder against a wall, the bottom of the ladder should be placed approximately __________ of the vertical height from the wall.

Accepted Answer

The bottom of the ladder should be placed approximately 1/4 of the vertical height from the wall, meaning for every 4 feet of vertical height, the base of the ladder should be 1 foot from the wall. This angle is considered the safest and most stable for climbing and working on the ladder.

Question 16

Fires that occur with flammable liquids, such as gasoline, oil, grease, paints, and thinners are Class __________ fires.

Accepted Answer

Class B fires involve flammable liquids and gases.

Question 17

The National Electrical Code is revised every __________ years to reflect the latest changes and trends in the electrical industry.

Accepted Answer

The National Electrical Code (NEC) is revised every 3 years to incorporate the latest safety standards and technological advancements in the electrical industry.

Question 18

A two-pronged plug that distinguishes between the grounded conductor and the 'hot' conductor by having a grounded conductor prong that is wider than the 'hot' conductor prong is called a(n) ____________________ plug.

Accepted Answer

The answer of A two-pronged plug that distinguishes between the...

Question 19

All electrical equipment and conductors are to be considered ____________________ until determined to be otherwise by testing methods.

Accepted Answer

The answer of All electrical equipment and conductors are to...

Question 20

The National Electrical Code chapter that covers Wiring Methods and Materials is __________.

Accepted Answer

Chapter 3 of the National Electrical Code (NEC) is dedicated to Wiring Methods and Materials, outlining the requirements for wiring systems and materials used in electrical installations.

Quiz 1: Residential Workplace Safety