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Substations > Flash cards > Flashcards

Flash cards

1
Q

True or false. Use of a rope lanyard is required every time you have to unbelt to move around an obstacle.

A

True

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2
Q

True or false when climbing towers you should check members such as braces and ladder rungs before placing weight on them.

A

True

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3
Q

True or false. Ladder should be placed at proper angle maintaining 25% of extended length as the required distance from the foot of the ladder to the vertical support.

A

True

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4
Q

True or false. Access to substations is restricted to people with at least a minimum of 5 years of experience.

A

False

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5
Q

A barricade may be crossed:
A:to answer the phone
B:to get another tool
C: for an emergency
D: none of the above

A

C

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6
Q

True or false. A barricade is a physical obstruction such as tapes, flags, cones, intended to provide a warning about and limit access to a hazardous area.

A

True

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7
Q

Which of the following devices alarms at 95C on most transformers.
A: winding temp device
B: oil flow device
C: liquid temp device
D: pressure relief device

A

C

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8
Q

All fall protection equipment should be stored
A: dry places
B: out of direct sunlight
C: in dedicated protective bags
D: all of the above

A

D

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9
Q

Which of the following devices relieves pressure instantaneously and has a visible mechanical indicator
A: rapid rise pressure relay
B: winding temp device
C: mechanical pressure relief device
D: none of the above

A

C

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10
Q

Which of the following devices sends an alarm when the oil approaches a point too for safe operation?
A: oil flow device
B: gas detector relay
C: winding temp gauge
D: liquid level gauge

A

D

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11
Q

Switched capacitors can be controlled by
A: time
B: current
C: voltage or voltage controlled
D: current compensated
E : all of the above

A

C

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12
Q

Name one of the two benefits of capacitors in a distribution substation.

A

Reduction of system losses and voltage improvement

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13
Q

Never purge air from the receiver tank when the temp is below
A: 40F
B: 50F
C: 42 F
D: 55F

A

A

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14
Q

A motor operated switch is normally {select incorrect answer}.
A: connected to a single blade disconnected switch
B: can be supervisory controlled
C: can have a remote controls
D: connected to a group operated disconnect switch

A

A

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15
Q

Why is it important to run an LTC or regulator through neutral
A: to check the oil level
B: exercise reversing switch
C: give customers high and low voltage
D: all of the above

A

B

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16
Q

When inspecting motor operator, inspect for
A: operation of heaters
B: position/location of mechanical coupling
C: proper operation of lights
D: all of the above

A

D

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17
Q

During station inspection of the LTC and regulator controls, you should
A: record position of drag hands
B: manually operate to raise and lower
C: listen for abnormal noises
D: all of the above

A

D

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18
Q

List 5 items that must be checked when inspecting vacuum interrupters

A

The actuator arm is engaged in the cradle of the movable contact
Condition of insulators
Connections
Vacuum modules condition of chambers
Motor operator and heaters

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19
Q

The vacuum bottle provides a method of ?

A

Breaking load or energizing currents

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20
Q

Which of the following devices warns of a pump problem or an obstruction in the oil flow path?
A: liquid level gauge
B: oil flow gauge
C: oil warning light
D: none of the above

A

B

21
Q

Which color of light represents a closed motor operated switch?
A: amber
B: green
C: red
D: orange

A

C

22
Q

True or false
All ground connections shall be checked each time you enter the substation.

A

True

23
Q

True or false
Current transformers provide isolation between the secondary circuit and the primary circuit

A

True

24
Q

Which color indicating light monitors the trip circuit of a breaker?
A: white
B: green
C: red
D: blue

A

C

25
Q

Check the condition of the low side terminal box for
A: corrosion/moisture
B: condition of fuses
C: insects
D: all of the above

A

D

26
Q

True or false
A white light is used to monitor lock out relay coil circuits.

A

True

27
Q

True or false
There is no need to look at the bus work in the air if you find no broken insulators on the ground.

A

False

28
Q

List any 3 uses of a PT

A

They reduce high voltage to 120 to 240v
They provide safe low voltage capacity
Make safe to use with wattmeters, watt hour meters, protective relays and indicating lights

29
Q

When you find an oil level gauge that is in the low position, you should
A: add oil
B: add nitrogen
C: call DEC
D: look for leaks

A

D

30
Q

True or false
Electronic recliners are installed on all classes of distribution and transmission voltages

A

True

31
Q

True or false
Substation diesel generators provide essential control voltage and power to operate the substations equipment in the event of a loss of station service

A

True

32
Q

True or false
it is important to record the relay target information on the circuit breaker operation counter card

A

True

33
Q

How often are electronic reclosers inspected
A: weekly
B: every other week
C: monthly
D: every other month

A

C

34
Q

Diesel generators used to supply backup power in our substations are inspected
A: annually
B: every other month
C: monthly
D: quarterly

A

A

35
Q

Puffer switches must have sufficient sf6 gas to adequately interrupt load/fault currents. This is verified by
A: PSIG
B: pressure indicator
C: blue light
D: all of the above

A

A

36
Q

False battery voltage can occur when the ambient temp is below ____F

A

20

37
Q

The interrupting medium for the SF6 puffer switch , circuit switcher, transrupter switch is.
A: oil
B: vacuum
C: sulfur hexafloride gas
D: water

A

C

38
Q

Substation diesel generators are normally located in nysegs_____ and _________ substations?
A: 115kV, 230kV
B: 34.5kV, 115kV
C: 230kV, 345kV
D: none of the above

A

A

39
Q

True or false
Electronic reclosers are used on circuits with high magnitude short circuit currents

A

False

40
Q

True or false
There is no reason to inspect a mobile substation while it is in storage

A

False

41
Q

If there is an indication of low SF6 gas, what action must be taken?

A

Report to supervisor

42
Q

True or false
Scetionalizers interrupt fault currents

A

False

43
Q

True or false
Float voltage should be taken from the charger nameplate

A

False

44
Q

The voltage detecting device shall be tested ______and ______using it on the lines to be grounded to ensure that the device is functioning properly.

A

Before after

45
Q

Name 3 items to be performed on a battery charger inspection

A

Ground light
Ground relay
Ground detection switch
Low voltage relays
High dc voltage
Loss of ac relays

46
Q

Which of the following devices are commonly used to protect the electrical system from the dangers associated with faults.
A: fuses
B: circuit breakers
C: reclosers
D: transformers

A

B

47
Q

How often are mobile substations inspected while in service
A: weekly
B: every other week
C: monthly
D: every other month

A

A

48
Q

Power is measured in?

A

Watts

49
Q

______are used in distribution substations to regulate the load side voltage.

A

Regulators

Substations (1 decks)

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