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HFD Acting Exam Correct Answers Only > Electrical Safety Handbook (50 Questions) > Flashcards

Electrical Safety Handbook (50 Questions) Flashcards

1
Q

According to the Electrical Safety Handbook, ________ is the difference in electrical potential between two points in a circuit. It is the force that causes the flow of electricity, and it is measured in volts. Can be compared to water pressure.

A

Voltage

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2
Q

According to the Electrical Safety Handbook, ___________ is similar to the effect of friction on the flow of water inn a pipe. (Water flows more freely in a large pipe than a small one.) Different materials have different resistance to the flow of electricity. Very high resistance materials are called insulators, while the low resistance materials are called conductors. Resistance is measured in ohms.

A

Resistance

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3
Q

According to the Electrical Safety Handbook, ________ is the process of mechanically connecting isolated wires and equipment to the earth, with sufficient capacity to carry any fault current and to ensure the wires and equipment remain at the same potential (same voltage) as the earth (ground).

A

Grounding

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4
Q

According to the Electrical Safety Handbook, ________ is a flow of electrical charge. It can be compared to the rate of flow of water in a pipe. Current is typically measures in amperes (or amps).

A

Current

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5
Q

According to the Electrical Safety Handbook, electrical hazards are created when electrical equipment or wires have become faulty. Which of the following examples are correct that can lead to electrical hazards?

A

A) Worn out or deteriorated
B) Improperly installed
C) Adverse weather/natural events exposure
D) All of the above

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6
Q

According to the Electrical Safety Handbook, overloading of electrical conductors and motors accounts for the majority fires caused by ___________. There is a danger when the amount of electrical current exceeds the capacity conductors and equipment are designed to carry.

A

Overheating

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7
Q

According to the Electrical Safety Handbook, which of the following is not an example of an insulator?

A

Gold

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8
Q

According to the Electrical Safety Handbook, because electricity takes all paths to ground, electrical systems use multiple safety systems to deal with system faults. Conductive _____ rods are one component used to ensure that any stray electricity is returned to earth.

A

Grounding

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9
Q

According to the Electrical Safety Handbook, related electricity on the ground to a rippling water in a pool is attempting to explain the effect known as “ ______ gradient”. It is also referred to as “ground gradient”

A

Potential

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10
Q

According to the Electrical Safety Handbook, the potential gradient, or voltage difference, creates two problems known as “ ____________ potential” and “__________ potential”

A

Step & Touch

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11
Q

According to the Electrical Safety Handbook, the further apart that “X” and “Y” are, the greater the electrical contact hazard. This effect is referred to as “ potential”

A

Step

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12
Q

According to the Electrical Safety Handbook, in a manner similar to step potential, electricity would flow through your body if you were to pkace your hand on an energized source, while your feet were at some distance apart from the source. The electricity would flow through the hand, arm, chest, abdomen, leg and foot to the ground. The difference in voltage (potential difference) in this case is referred to as “ ______ potential”

A

Touch

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13
Q

According to the Electrical Safety Handbook, a victim exposed to a large electric arc can e injured by the intense heat, molten metal splatter or by ultraviolet rays. The effect of electricity on the body and the severity of the shock depends on the:

A

A) Condition of the skin
B) Pressure of the body against the source
C) Moisture level of the surface of the skin
D) All of the above

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14
Q

According to the Electrical Safety Handbook, any victim of electrical shock should be assessed for the following effects of the body except for:

A

Permanent blindness from the sheer brilliance of the flash called “dazzle”

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15
Q

According to the Electrical Safety Handbook, any victim of electrical arc flash should be assessed for the following effects on the body except for:

A

Slight tingling sensation

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16
Q

According to the Electrical Safety Handbook, ladders and stretchers, due to their length, can present significant “___________and ____________ potential” hazards and must be kept away from downed power lines

A

Step and touch

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17
Q

According to the Electrical Safety Handbook, portable Generators should be of the _________
___ type.

A

Bonded neutral

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18
Q

According to the Electrical Safety Handbook, mounted power inverters and generators must be to the vehicle frame and all supply circuits from the generator must be protected by ground fault circuit interrupters (GFCI)

A

Bonded

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19
Q

According to the Electrical Safety Handbook, which of the following would be considered areas that may contain open energized equipment:

A

A) Electrical Vaults
B) Substations
C) Generating Stations
D) All of the above

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20
Q

According to the Electrical Safety Handbook, which of the following equipment may create an arcing situation where there is open energized equipment?

A

A) Stretchers
B) Oxygen/Trauma Bags
C) Portable radios
D) All of the above

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21
Q

According to the Electrical Safety Handbook, which of the following is not one of the three parts to a typical electrical system:

A

Voltages

22
Q

According to the Electrical Safety Handbook, hich of the following is correct, a single wooden pole transmission line will range in voltage from:

A

69,000 – 115,000 V

23
Q

According to the Electrical Safety Handbook, an easy to remember rule for working around live high voltage transmission lines is to keep at least ___ metres (___ft.) away.

A

6 metres, 20 ft.

24
Q

According to the Electrical Safety Handbook, which of the following about fallen or low hanging wires is incorrect?

A

Stand well back, at least 5 metres (16 ft.) or more away. Look and locate all wire ends

25
Q

According to the Electrical Safety Handbook, bystanders should be back at least ____ metres (____ ft.)

A

10 metres (33 ft.)

26
Q

According to the Electrical Safety Handbook, a fallen wire lies on top of, or under a vehicle with one or more people inside, the driver is unable to move the vehicle or the vehicle will not move, which of the following instructions is correct?

A

A) Instruct the driver to “Stay in the vehicle….” Until the electrical utility personnel arrive
B) Continually monitor the safe zone, secure the area and keep people away
C) A vehicle’s tires may smoke or explode from heating up, but do not advise leaving the vehicle except in the event of fire
D) All of the Above

27
Q

According to the Electrical Safety Handbook, victim(s) are unconscious and there are fallen wires under or on the vehicle or hanging very close to the vehicle, which of the following instructions is correct?

A

A) Determine and continually monitor the safe zone, secure the area and keep people away
B) Monitor closely for any change in the situation (fire starts etc.) Instruct any victim who might regain consciousness to “Stay in the vehicle…” until the power line is de-energized (made safe)
C) DO NOT take action which would endanger your own life or the lives of others
D) All of the Above

28
Q

According to the Electrical Safety Handbook, keep bystanders and non-emergency persons at least ____ metres (_____ ft.) from a vehicle tire pyrolysis incident.

A

100 metres (330 ft.)

29
Q

According to the Electrical Safety Handbook, a standard precautionary approach to fighting wood pole fires includes the following except:

A

Use a straight stream at 550 kpa (80 psi) at the nozzle

30
Q

According to the Electrical Safety Handbook, what action for fighting a fire on power line equipment is incorrect:

A

Use foam on live electrical equipment. Foam is not a good electrical conductor

31
Q

According to the Electrical Safety Handbook, if an intense fire is burning near live conductors, a step potential hazard could occur within what is called the ____-____ hazardous zone

A

Arc-Over

32
Q

According to the Electrical Safety Handbook, which of the following is incorrect for responses involving trees or other objects in contact with a power line:

A

Do not wait for the local electrical utility personnel to isolate and de-energize the power line

33
Q

According to the Electrical Safety Handbook, a Padmount transformer or switching kiosk is damaged in a vehicle accident. Which of the following should you not do?

A

Walk normal, keep feet apart when approaching the vehicle

34
Q

According to the Electrical Safety Handbook, an underground live power line is damaged by digging machinery. Which of the following is incorrect?

A

Determine the safe zone (15 metres, 49 ft.), secure the area, inform other emergency responders and keep people back

35
Q

According to the Electrical Safety Handbook, hazards in substation component buildings include all except:

A

Anhydrous Ammonia

36
Q

According to the Electrical Safety Handbook, _____ _____ are metal conduits that are used within substations to carry the electricity from transformers to other devices inside the substation.

A

Bus Bars

37
Q

According to the Electrical Safety Handbook, you have responded to a call with an injured person who has entered a substation. What action would you not do?

A

Cut the fence to gain patient access

38
Q

According to the Electrical Safety Handbook, you have responded to a fire in a substation or switchyard. Which of the following is incorrect?

A

Do not wait for electrical utility personnel to arrive. Enter the substation to extinguish the fire

39
Q

According to the Electrical Safety Handbook, the minimum recommended distance for Fire Fighting inside Electrical Substations Switchyards is ____ m, ____ ft.

A

10 metres, 33 ft.

40
Q

According to the Electrical Safety Handbook, the majority of fires in substations involve combustible insulating oil used in transformers, circuit breakers, and capacitors. This insulating oil has a minimum flash point of 145 C (293 F) and will generate temperatures in excess of ______°C, (_______°F)

A

1000°C, (1850°F)

41
Q

According to the Electrical Safety Handbook, you are responding to a fire at a substation or switchyard and you suspect PCBs in the fire, which of the following actions should you not do?

A

Provide ‘stay-in-place’ direction for people located in path of the smoke plume

42
Q

According to the Electrical Safety Handbook, when rescuers or fire fighters are working from an aerial device, it is essential to maintain the limits of approach of ____ metres, (___ ft.) from the power line

A

3 metres, 10 ft.

43
Q

According to the Electrical Safety Handbook, which of the following is true about pulling the meter?

A

A) It may violently arc or explode
B) It does not guarantee that the power supply has been interrupted
C) Power theft situations typically by-pass the meter
D) All of the above

44
Q

According to the Electrical Safety Handbook, which of the following is not a sign of an electrically charged floor:

A

Dry floor, with electrical equipment safely secured and inspected

45
Q

According to the Electrical Safety Handbook, which of the following Hazards in electrical vaults is in correct:

A

No risk of Explosion

46
Q

According to the Electrical Safety Handbook, access for emergency responders can be difficult. Which of the following is correct, emergency responders should never attempt to remove anyone from inside a vault unless:

A

A) They are certain that the power is off
B) The victim is not in contact with an electrical power source
Both A & B are correct

47
Q

According to the Electrical Safety Handbook, identifying Photovoltaic systems on the roof-tops of houses or commercial/industrial buildings could present a challenge to fire fighters as they may not be seen from street side and are usually difficult to see at night. Which of the following clues that may attract fire fighter’s attention are correct?

A

A) Locating inverter boxes outside
B) Additional meters
C) Conduit installed on the exterior of the building
D) All of the above

48
Q

According to the Electrical Safety Handbook, which of the following electrical contact / shock hazards is not correct in illegal ‘Grow Ops’?

A

Equipment will be bonded or grounded properly, limiting short circuits and hazards

49
Q

According to the Electrical Safety Handbook, which of the following is not a fire hazard in illegal ‘Grow Ops’?

A

Improper use of Lithium-ion batteries

50
Q

According to the Electrical Safety Handbook, which of the following is not an entanglement hazards in illegal ‘Grow Ops’?

A

Use of undersized extension cords

HFD Acting Exam Correct Answers Only (17 decks)

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