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SKT Book 1 > B1U4 Generator Operations And Maintenance > Flashcards

B1U4 Generator Operations And Maintenance Flashcards

1
Q

When is a preoperational inspection required?

A

Before starting a generator.

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2
Q

When is it necessary to open a work order?

A

When the problem found with any parts of the generator system cannot be immediately repaired.

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3
Q

What are two instances when a generator may be required?

A

During an emergency outage and a planned outage.

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4
Q

How often do you inspect the generator during emergency outages?

A

When you arrive at the generator site and every two hours afterwards.

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5
Q

Why do you check all the indicators and gauges during the operational inspection during an emergency outage?

A

To ensure that there are not any conditions that may cause damage to the generator or the load that it is supplying power to.

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6
Q

Why do you check all the indicators and gauges during the operational inspection during an emergency outage?

A

.

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7
Q

What would be a reason for a planned outage in which you would put a generator on-line?

A

When work is being done on the electrical distribution that feeds the facility.

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8
Q

Why would you perform an emergency shutdown?

A

To prevent damage to the generator and the facility that it is connected to.

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9
Q

What portion of the semi-monthly inspection is optional?

A

Engine start.

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10
Q

On what form do you annotate periodic inspections?

A

AF Form 487.

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11
Q

What can you do to augment load to achieve the minimum load requirements during a semiannual inspection?

A

Use a load bank.

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12
Q

Why is it often necessary to calculate the kW or amperage on a generator?

A

Because some generators do not have kW and amperage meters.

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13
Q

You are operating a single-phase generator that produces 240 VAC with an amperage draw of 74 amperes. You need to calculate the kW of the generator. Round it to the nearest kW.

A

14kw

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14
Q

You are operating a three-phase generator that produces 120/208 volts. The amperage readings are phase 1 reads 85 amperes, phase 2 reads 75 amperes, and phase 3 reads 92 amperes. You need to calculate the kW of the generator. Round it to the nearest kW.

A

24 kw

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15
Q

You are operating a three-phase, 120/208 VAC generator with 63 kW on it, but it does not have an ammeter. What is the amperage? Round it to the nearest ampere.

A

219 amps

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16
Q

You are operating a single phase, 120 VAC generator with 32 kW on it, but it does not have an ammeter. What is the amperage? Round it to the nearest amp.

A

333 amps

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17
Q

When calculating facility power requirements to size a generator, the load should be what percent of the generator’s rated capacity?

A

No less than 50 percent.

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18
Q

When generator fuel consumption is not known, what is the formula for calculating fuel requirements?

A

One gallon per hour for each 10 kW of load.

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19
Q

is the maximum slope a MEP series generator can operate on?

A

15 degrees

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20
Q

What does the code THHN on a piece of cable mean?

A

Insulation: thermoplastic (T); conductor application: heat resistant to 194°F (HH), and outer covering: nylon (N)

21
Q

What is the rating of cable with four to six wires in it?

A

80 percent of the normal rating.

22
Q

How does the reconnection panel allow you to connect the alternator windings?

A

Either in series or parallel.

23
Q

When performing a before operations inspection, what do you do to the fuel filter/fuel water separator?

A

Drain water.

24
Q

During what inspections do you check the oil level?

A

Before, during, and after operation inspections.

25
Q

Why do you let the cooling system cool before performing checks, services, and maintenance?

A

Cooling system operates at high temperature and pressure. Contact with high pressure steam and/or liquids can result in burns and scalding.

26
Q

When do you check the output box assembly for loose or damaged wiring or cables?

A

Before operation.

27
Q

When starting the engine on a single-unit generator, in what position is the ENGINE CONTROL switch placed if you are using an auxiliary fuel source?

A

PRIME & RUN AUX FUEL position.

28
Q

When connecting the generator to the load, what step must be done after closing the load contactor and ensuring the load is not too much for the generator?

A

Perform all DURING (D) PMCS requirements in accordance with technical order.

29
Q

What is the last step when shutting down the generator?

A

Place the DEAD CRANK switch in the OFF position.

30
Q

Are the MEP 806B generators able to parallel with no load?

A

Yes

31
Q

How often is oil changed in mobile generators?

A

Semiannually or every 300 operating hours.

32
Q

How often is coolant changed in mobile generators?

A

Biannually or every 300 operating hours.

33
Q
  1. (013) When performing a preoperational inspection on a permanently installed generator, you check the coolant level to make sure the

a. unit will not overheat during operation.
b. coolant conditioners are working correctly.
c. water pump is working properly.
d. unit will not shut down for low coolant pressure.

A

d. unit will not shut down for low coolant pressure.

34
Q
  1. (013) You are conducting a preoperational inspection on a permanently installed generator and find the oil level is too high. What should you do?

a. Ignore it and start the engine.
b. Annotate the condition and run the generator.
c. Annotate the condition and drain off the excess oil.
d. Run the engine for 15 minutes, shut it down, and check the level again.

A

c. Annotate the condition and drain off the excess oil.

35
Q
  1. (013) After a preoperational inspection, when is it necessary to open a work order for a permanently installed generator system that is not in proper working order?

a. When the problem found doing the inspection cannot be immediately repaired.
b. Anytime you do a preoperational inspection.
c. When any discrepancy is found doing the inspection.
d. Anytime you make a repair.

A

a. When the problem found doing the inspection cannot be immediately repaired.

36
Q
  1. (014) Which portion of the semi-monthly inspection is optional?

a. Engine start.
b. Check coolant level.
c. Check direct current (DC) electrical system.
d. Annotation on inspection checklist for the Generator Operating Log.

A

a. Engine start.

37
Q
  1. (014) How is a permanently installed generator tested during a semiannual inspection?

a. Using the automatic transfer switch (ATS) test switch.
b. Starting the generator manually.
c. Turning the power off to the ATS.
d. Using the generator test switch.

A

c. Turning the power off to the ATS.

38
Q
  1. (015) When calculating facility power requirements, to what percent of the permanently installed generator’s load capacity should you size a generator?

a. No more than 50 percent.
b. No less than 75 percent.
c. No less than 50 percent.
d. No more than 60 percent.

A

c. No less than 50 percent.

39
Q
  1. (016) What is the most common material used in cables?

a. Brass.
b. Copper.
c. Aluminum.
d. Copper-clad aluminum.

A

B. Copper

40
Q
  1. (016) What type of coding is placed on a conductor to identify the type of insulation?

a. Letters.
b. Numbers.
c. Special symbols.
d. Combination of letters, numbers, and symbols.

A

A. Letters

41
Q
  1. (016) The voltage reconnection panel allows the alternator windings to be connected in

a. either series or parallel.
b. both series and parallel simultaneously.
c. either sequence or series.
d. both sequence and parallel simultaneously.

A

a. either series or parallel.

42
Q
  1. (016) What happens if you attempt to change the position of the voltage reconnection panel while the mobile electric power (MEP) series generator 200 kilowatts and below generator set is operating?

a. Nothing.
b. Electrocution.
c. The voltage changes.
d. The generator shuts down.

A

B. Electrocution

43
Q
  1. (016) On a 200 kilowatts and below mobile electric power (MEP) series generator, how is the movable portion of the reconnection panel adjusted to produce the desired voltage output?

a. Turn it over and reconnect it.
b. Rotate it 90 degrees and reconnect it.
c. Align its arrow with the desired control panel arrow.
d. Align its arrow with the desired stationary board arrow.

A

d. Align its arrow with the desired stationary board arrow.

44
Q
  1. (017) Why do you wait to perform checks, service, or maintenance on coolant systems on a mobile electric power (MEP) 806B until it cools down?

a. The level will be different.
b. The pressure steam can cause injury.
c. The coolant will not appear in the radiator.
d. The safety systems will not allow you to open the radiator cap.

A

b. The pressure steam can cause injury.

45
Q
  1. (017) When starting a mobile electric power (MEP) 806B, how long do you hold the engine control switch in the start position?

a. 1 second.
b. 2 seconds
c. 3 to 5 seconds.
d. 4 to 6 seconds.

A

B. 2 seconds

46
Q
  1. (017) How long should you let the mobile electric power (MEP) 806B warm up before connecting to load?

a. 2 minutes.
b. 1 minute
c. 5 minutes.
d. 10 minutes.

A

C. 5 minutes

47
Q
  1. (017) When is the magnetic pickup removed, inspected, and cleaned on a mobile electric power (MEP) 806B?

a. Quarterly.
b. Semiannually.
c. Annually.
d. Biannually.

A

C. Annually

48
Q
  1. (017) How often is the coolant drained and flushed on a mobile electric power (MEP) 806B?

a. Semiannually or at 300 operating hours, whichever comes first.
b. Annually or at 300 operating hours, whichever comes first.
c. Every two years or at 300 operating hours, whichever comes first.
d. Annually regardless of operating hours.

A

b. Annually or at 300 operating hours, whichever comes first.

49
Q
  1. (017) When is the first oil change done on a mobile electric power (MEP) 806B?

a. Semiannually or at 300 operating hours, whichever comes first.
b. Every two years or at 300 operating hours, whichever comes first.
c. Annually regardless of operating hours.
d. At 100 operating hours.

A

a. Semiannually or at 300 operating hours, whichever comes first.

SKT Book 1 (6 decks)

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