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4th Year - Motor Control > Electrical Safety with Motor Controls > Flashcards

Electrical Safety with Motor Controls Flashcards

1
Q

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

A

True

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2
Q

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

A

All of the above

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3
Q

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

True or False

A

True

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4
Q

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

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

A

D) NFPA

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5
Q

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

True of False

A

True

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6
Q

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

A

False

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7
Q

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.

A

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

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8
Q

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

A

B and C

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9
Q

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

A

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

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10
Q

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

A

E) Warning

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11
Q

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

A

B) Step 2

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12
Q

___ 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

A

B) Tagout

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13
Q

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

A

B) 3,000 V

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14
Q

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

A

E) Step 5

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15
Q

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

A

B) Step 2

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16
Q

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

A
  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
17
Q

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.

A

D) II., III., and IV.

18
Q

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.

A

B) I. and III.

19
Q

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

A

D) qualified persons

20
Q

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

A

A) arc flash boundary

21
Q

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

A

E) IV only

22
Q

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

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

A

B) qualified

23
Q

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

A

A) True

24
Q

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.

A

B) I. and V.

25
Q

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.

A

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

26
Q

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)

A

C and D

27
Q

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

A

C) restricted approach boundary

28
Q

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.

A

C) II. and III.

29
Q

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.

A

B) I. and IV.

30
Q

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

A

B) Electrostatic discharge

31
Q

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

A

D) Step 4

32
Q

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

A

E) All listed answers

33
Q

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

A

B) limited approach boundary

34
Q

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

A

A) Step 1

4th Year - Motor Control (13 decks)

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