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HFD Acting Exam 2022 > Electrical Safety Handbook > Flashcards

Electrical Safety Handbook 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 waterpressure.
A) Voltage
B) Current
C) Resistance
D) Grounding

A

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 theflow of electricity. Very high resistance materials are called insulators, while the low resistance materials are called conductors. Resistance is measured in ohms.
A) Voltage
B) Current
C) Resistance
D) Grounding

A

C) 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) Voltage
B) Current
C) Resistance
D) Grounding

A

D) 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 apipe. Current is typically measures in amperes (or amps).
A) Voltage
B) Current
C) Resistance
D) Grounding

A

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

A

D) All 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 exceedsthe capacity conductors and equipment are designed to carry.
A) Arcing
B) Overheating
C) Voltage
D) None of the above

A

B) 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) Porcelain B) Glass
C) Gold
D) Plastic

A

C) 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 component used to ensure that any stray electricity is returned to earth.
A) Voltage
B) Potential
C) Insulating
D) Grounding

A

D) 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 “ “ground gradient”
A) Current
B) Voltage
C) Potential
D) Resistance

A

C) 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) Resistive & Touch
B) Step & Touch
C) Step & Voltage
D) Fault & Touch

A

B) 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 isreferred to as “
A) Ground
B) Step
C) Fault
D) Gradient

A

B) 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 thesource. 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) Ground B) Step
C) Fault D) Touch

A

D) Touch

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13
Q

According to the Electrical Safety Handbook, a victim exposed to a large electric arc can be 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 dependson the:
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

A

All 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) Contraction of chest muscles,causing breathing difficulty and unconsciousness
B) Respiratory distress caused by temporary paralysis of the respiratory canter
C) Permanent blindness from the sheer brilliance of the flash called “dazzle”
D) Burns to tissue at the entrance and exit points

A

C) 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 exceptfor:
A) Burns to the skin from the ultraviolet radiation of the flash
B) Slight tingling sensation
C) Burns to the eyes and skin from molten metal splatter
D) Burns to the skin from clothing including under layers of clothing that were ignited by the arc flash

A

B) 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 ground
B) Step and touch
C) Ground and touch
D) Fault and touch

A

B) Step and touch

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17
Q

According to the Electrical Safety Handbook, portable Generators should be of the _________ ___ type.
A) Insulated neutral
B) Bonded negative
C) Bonded neutral
D) Bonded positive

A

C) Bonded neutral

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18
Q

According to the Electrical Safety Handbook, mounted power inverters and generators must be vehicle frame and all supply circuits from the generator must be protected by ground fault circuit interrupters (GFCI)
A) Bolted
B) Bonded
C) Epoxied
D) Fixed

A

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

A

D)All 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) Stretchers
B) Oxygen/TraumaBags
C) Portable radios
D) All of the above

A

D) All 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) Generation
B) Voltages
C) Transmission
D) Distribution

A

B) 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) 500,000 V
B) 230,000 V
C) 115,000 – 230,000 V
D) 69,000 – 115,000 V

A

D) 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) 3 metres, 10 ft.
B) 5 metres, 16 ft.
C) 6 metres, 20 ft.
D) 10 metres, 33 ft.

A

C) 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) Before getting out of your vehicle, examine the surroundings carefully and make sure you are parked well away from fallen wires
B) Stand well back, at least 5 metres (16 ft.) or more away. Look and locate all wire ends
C) Establish a safe zone, at least 10 metres (33 ft.) away from wires and anything the wires may be touching
D) Secure the area

A

B) 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) 3 metres (10 ft.)
B) 5 metres (16 ft.)
C) 10 metres (33 ft.)
D) 15 metres (50 ft.)

A

C) 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) 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

A

D) All 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) 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

A

D) All 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) 15metres(50ft.)
B) 50metres(165ft.)
C) 100 metres (330 ft.)
D) 200 metres (660 ft.)

A

C) 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
B) Wear full turnout gear and SCBA
C) Position apparatus upwind and out of the line of fire of a vehicle’s tires
D) Evacuate people located in path of smoke plume and at safe distances from a ground
gradient grid or tire explosion

A

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) Assess the situation format least 10metres(33ft.)back. Attempt to determine the voltage involved. If you aren’t certain, assume the highest voltage
B) DO NOT apply a straight water stream directly on the fire. Electricity can travel through the stream and back to the nozzle
C) Use foam on live electrical equipment. Foam is not a good electrical conductor
D) Set the nozzle to produce fog (minimum 30 degree pattern) and ensure the designed pressurestays at or above 700 Kpa or 100 psi) at the nozzle

A

C) 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
B) High-Voltage
C) Low-Voltage
D) Arc-Under

A

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) Assess the situation from the distances shown in the Ground Step Potential Hazard
B) Do not wait for the local electrical utility personnel to isolate and de-energize the power line
C) Determine what objects (tree, branch, ladder, pole etc.) are contacting, or are close to power lines
D) If Objects are in contact with power lines, determine the safe zone and secure the area

A

B) 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) Assess the situation from at least 10metres(33ft.)back
B) Determine the safe zone,secure the area,inform other emergency responders and keep
people away
C) Tell occupants of the vehicle to “Stay in the vehicle. We are contacting the electrical utility”
D) Walk normal, keep feet apart when approaching the vehicle

A

D) 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) Assess the situation from at least 10metres(33ft.)back
B) Determine the safe zone (15 metres, 49 ft.), secure the area, inform other emergency responders and keep people back
C) Call the electrical utility. Give the location and provide the number of the nearest transformer or switching kiosk. Numbers are stenciled on the unit usually in yellow lettering
D) Tell the operator of the machinery to “Stay in the machine. We are contacting the electrical utility”

A

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

35
Q

According to the Electrical Safety Handbook, hazards in substation component buildings include all except:
A) Batteries containing sulphuric acid
B) Energized relays
C) Anhydrous Ammonia
D) Oil-filled transformers and circuit breakers

A

C) 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) Substation Conservators
B) ExplosionVents
C) Porcelain Bushings
D) Bus Bars

A

D) Bus Bar

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) Calmly, tell the person to move to the fence if they are able
B) Cut the fence to gain patient access
C) Call the local electrical authority for assistance and follow their instructions including waiting for their arrival
D) When the electrical utility personnel arrive, initiate rescue under their direction

A

B) Cut the fence to gain 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) Notify dispatch to call the electrical utility immediately, and inform other emergency responders of the identified dangers
B) Upon arrival, park vehicles and apparatus well away from the substation
C) Do not wait for electrical utility personnel to arrive. Enter the substation to extinguish the fire
D) Prepare equipment and protect exposures (surrounding property) applying water using fog spray (700 Kpa, [100 psi at the nozzle], 30 degree)

A

C) 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) 3 metres, 10 ft.
B) 5 metres, 16 ft.
C) 10 metres, 33 ft.
D) 15 metres, 50 ft.

A

C) 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) 750°C,(1382°F)
B) 1000°C,(1850°F)
C) 1100°C, (2012°F)
D) 1250°C, (2282°F)

A

B) 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) Consult the Emergency Response Guidebook (ERG)
B) Use dry chemical, CO2 or foam if possible
C) Provide ‘stay-in-place’ direction for people located in path of the smoke plume
D) Provide for liquid runoff containment

A

C) 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) 2 metres, 7 ft.
B) 3 metres, 10 ft.
C) 5 metres, 16 ft.
D) 10 metres, 33 ft.

A

B) 3 m, 10 ft

43
Q

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

A

D) All the above

44
Q

According to the Electrical Safety Handbook, which of the following is not a sign of an electrically charged floor:
A) Unusual sparking
B) Dry floor, with electrical equipment safely secured and inspected
C) Unconscious victims
D) Persons receiving shocks from equipment touching the wet area

A

B) 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 incorrect:
A) Large volumes of thick toxic black smoke
B) Fire
C) No risk of Explosion
D) Flying debris

A

C) 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) They are certain that the power is off
B) The victim is not in contact with an electrical power source
C) None of the above
D) Both A & B are correct

A

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

A

D) All 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) Even if the meter was removed, the tapped connections are done on the utility feed which is live at all times until the utility company disconnects the feed from the street
B) Equipment will be bonded or grounded properly,limiting short circuits and hazards
C) Deliberately set booby traps of various types attached to doors, handles and windows
D) Metals in close proximity becoming energized causing serious injury or electrocution

A

B) 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) High heat producing equipment placed on or near building combustibles
B) Improper use of Lithium-ion batteries
C) Overloaded circuits with inadequate or bypassed overload protection
D) Use of undersized extension cords

A

B) 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
B) Improperly installed low-hanging flexible ducting
C) Improperly strung unprotected wiring
D) Batteries or capacitors randomly positioned and wired together

A

A) Use of undersized extension cords

HFD Acting Exam 2022 (18 decks)

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