Electrical Safety with Motor Controls

Question 1

Two organizations that are leading contributors to electrical safety are the National Fire Protection Association (NFPA) and the Occupational Safety and Health Administration (OSHA)

True or False

Answer 1

True

Question 2

Which of the following does NFPA 70E recognize as electrical hazards be definition?

A) Electrical Shock
B) Arc Flash Burn
C) Thermal Burn
D) Arc Blast Injury

Answer 2

All of the above

Question 3

According to NFPA 70E, a qualified person must be able to “identify the hazards and reduce the associated risk.”

True or False

Answer 3

True

Question 4

Which of the following organizations are identified as sponsors in developing the NEC and NFPA 70E

A) IBEW
B) NEMA
C) IEC
D) NFPA

Answer 4

D) NFPA

Question 5

The current pathway through the body is determined by the contact locations and internal body chemistry.

True of False

Answer 5

True

Question 6

It’s okay to use electrical power tools without a ground or without them being double-insulated because standing in water is not typically a problem on the jobsite.

True or False

Answer 6

False

Question 7

Choose the factors listed below that would affect circuit characteristics on the human body in the event of an electrical shock.

I. Current
II. Resistance
III. Frequency
IV. Voltage

A) I. and II.
B) I., II., III., and IV.
C) II. and III.
D) II., III., and IV.

Answer 7

B) I., II., III., and IV.

Question 8

Which two types of motor protection protect the motor when starting and running? (Choose two)

A) High load protection
B) Overcurrent protection
C) Overload protection
D) Stop motion protection

Answer 8

B and C

Question 9

Safety rules that apply to commercial industrial installations for motor control include the following.

I. Always comply with the NEC, state, and local codes
II. Use UL-listed equipment, components, and test equipment.
III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify that the circuit is de-energized.
IV. Always use safety equipment

A) I., II., III., and IV.
B) I. and IV.
C) II. and III.
D) II., III., and IV

Answer 9

A) I., II., III., and IV.

Question 10

Which safety label indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury?

A) Caution
B) Danger
C) Electrical
D) Explosion
E) Warning

Answer 10

E) Warning

Question 11

According to NFPA 70E, in the process for verifying an electrical safe work condition, what step is identified as “After properly interrupting the load current, open the disconnecting device(s) for each source”?

A) Step 1
B) Step 2
C) Step 3
D) Step 4
E) Step 5

Answer 11

B) Step 2

Question 12

___ is the process of placing a danger tag on the source of electrical power, which indicates that the equipment may not be operated until the danger tag is removed.

A) Lockout
B) Tagout

Answer 12

B) Tagout

Question 13

People typically do not feel electrostatic discharge until the discharge reaches ___.

A) 10 V
B) 3,000 V
C) 5,000 V
D) 35,000 V

Answer 13

B) 3,000 V

Question 14

According to OSHA’s standard procedure for equipment lockout/tagout, what step is identified as “Release stored energy”?

A) Step 1
B) Step 2
C) Step 3
D) Step 4
E) Step 5

Answer 14

E) Step 5

Question 15

According to OSHA’s standard procedure for equipment lockout/tagout, what step is identified as “Shut down machinery or equipment”?

A) Step 1
B) Step 2
C) Step 3
D) Step 4
E) Step 5

Answer 15

B) Step 2

Question 16

List each OSHA procedure in order according to the standard procedure for lockout/tagout

-Release stored energy
-Isolate machinery or equipment
-Prepare for machinery shutdown
-Apply lockout or tagout
-Verify isolation
-Shut down machinery or equipment

Answer 16

1. Prepare for machinery shutdown
2. Shut down machinery or equipment
3. Isolate machinery or equipment
4. Apply lockout or tagout
5. Release stored energy
6. Verify isolation

Question 17

Safety rules that apply to commercial industrial installations for motor control include the following:

I. Never comply with the NEC®, state, and local codes.
II. Use UL®-listed equipment, components, and test equipment.
III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify that the circuit is de-energized.
IV. Always use safety equipment.

A) I., II., III., and IV.
B) I. and IV
C) II. and III.
D) II., III., and IV.

Answer 17

D) II., III., and IV.

Question 18

The current pathway through the body is determined by which two factors?

I. Contact locations
II. Frequency of time
III. Internal body chemistry
IV. Voltage of secondary

A) I., II., III., and IV.
B) I. and III.
C) II. and III.
D) II., III., and IV.

Answer 18

B) I. and III.

Question 19

To prevent an accident, electrical shock, or damage to equipment, all electrical work must be performed by ___.

A) a maintenance professional
B) a person from the shop
C) computer technicians
D) qualified persons

Answer 19

D) qualified persons

Question 20

The ___ separates an area in which a person is likely to be exposed to a second-degree burn from an area in which the potential for injury does not likely include a second-degree burn.

A) arc flash boundary
B) limited approach boundary
C) restricted approach boundary

Answer 20

A) arc flash boundary

Question 21

Which of the following organizations are identified as sponsors in developing the NEC and NFPA 70E?

I. International Brotherhood of Electrical Workers (IBEW)
II. International Electrotechnical Commission (IEC)
III. National Electrical Manufacturers Association (NEMA)
IV. National Fire Protection Association (NFPA)

A) I. and II.
B) I., II., III., and IV.
C) I. and III.
D) II., III., and IV.
E) IV only

Answer 21

E) IV only

Question 22

A(n) ___ person is able to identify the hazards and reduce the associated risk involved.

A) acceptable
B) qualified
C) temporary
D) Topnotch

Answer 22

B) qualified

Question 23

To reduce the chance of electrical shock, it’s important to always ensure that portable electrical tools are in safe operating condition and contain a third wire on the plug for grounding.

A) True
B) False

Answer 23

A) True

Question 24

Which of the following are two areas that require attention when working safely with electric motors?

I. Electrical circuit
II. Guard or Housing
III. Pump
IV. Pump Motor
V. Rotating Shaft

A) I., II., III., and IV
B) I. and V.
C) II. and III.
D) II., III., and IV.

Answer 24

B) I. and V.

Question 25

A qualified person may perform the following tasks. I. Determine the voltage of energized electrical parts. II. Perform the appropriate task required during an accident or emergency situation. III. Understand electrical principles and follows all manufacturer procedures and approach distances specified by the NFPA. IV. Understand the operation of test equipment and follows all manufacturer procedures. A) I., II., III., and IV. B) I., and IV. C) II. and III. D) II., III., and IV.

Answer 25

A) I., II., III., and IV.

Question 26

Which of the following are two organizations that are leading contributors to electrical safety? (Choose two.) A) Electrical Shock Industry Association (ESIA) B) Insurance Industry Professionals of America (IIPA) C) National Fire Protection Association (NFPA) D) Occupational Safety and Health Administration (OSHA)

Answer 26

C and D

Question 27

The ___ is the distance from an exposed energized conductor or circuit part where an increased risk of electric shock exists due to the close proximity of the person to the energized conductor or circuit parts. A) arc flash boundary B) limited approach boundary C) restricted approach boundary

Answer 27

C) restricted approach boundary

Question 28

Safety rules that apply to commercial industrial installations for motor control include the following. I. Never comply with the NEC®, state, and local codes. II. Use UL®-listed equipment, components, and test equipment. III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify that the circuit is de-energized. IV. Never use safety equipment. A) I., II., III., and IV. B) I. and IV C) II. and III. D) II., III., and IV.

Answer 28

C) II. and III.

Question 29

Lockout/tagout is used in the following situations. I. When power is not required to be on for a piece of equipment. II. When machine guards or other safety devices are installed. III. When the no possibility exists of being injured or caught in moving machinery. IV. When jammed equipment is being cleared. A) I., II., III., and IV. B) I. and IV. C) II. and III. D) II., III., and IV.

Answer 29

B) I. and IV.

Question 30

What does ESD stand for when you see an ESD label on a PC board package? A) Electric system discharge B) Electrostatic discharge C) Energy system discharge D) Exit system discharge

Answer 30

B) Electrostatic discharge

Question 31

According to NFPA 70E, in the process for verifying an electrical safe work condition, what step is identified as “Release stored electrical energy”? A) Step 1 B) Step 2 C) Step 3 D) Step 4 E) Step 5

Answer 31

D) Step 4

Question 32

Which of the following does NFPA 70E recognize as electrical hazards by definition? (Select the best answer below.) A) Arc Blast Injury B) Arc Flash Burn C) Electric Shock D) Thermal Burn E) All listed answers

Answer 32

E) All listed answers

Question 33

The ___ is the distance from an exposed energized conductor or circuit part at which a person can get an electric shock and is the closest distance an unqualified person can approach. A) arc flash boundary B) limited approach boundary C) restricted approach boundary

Answer 33

B) limited approach boundary

Question 34

According to NFPA 70E, in the process for verifying an electrical safe work condition, what step is identified as “determine all possible sources of electrical supply to the specific equipment. Check applicable up-to-date drawings, diagrams, and Identification tags”? A) Step 1 B) Step 2 C) Step 3 D) Step 4 E) Step 5

Answer 34

A) Step 1