B1U3 General Tasks And Equipment

Question 1

What is the function of the control transformer?

Answer 1

To provide the proper value of voltage to operate the power contactor.

Question 2

What is the purpose of the voltmeter and ammeter?

Answer 2

These allow you to determine the rate of charge that the battery is drawing.

Question 3

What causes the output voltage to be lower than the input voltage on a battery charger?

Answer 3

The secondary windings have fewer turns than the primary windings.

Question 4

What is the primary concern when adjusting a battery charger?

Answer 4

The output voltage.

Question 5

If you are working with a 12-volt battery, what is the range of the output of the battery?

Answer 5

Between 12.5 to 13.2 volts.

Question 6

Why must you check the adjustments you made to a battery charger the following day?

Answer 6

To take a second look at the charging rate to make sure it is set correctly.

Question 7

What are the two types of load banks that have been developed?

Answer 7

Portable and stationary.

Question 8

What is the function of the control/blower voltage selector switch on a load bank?

Answer 8

It allows the operator to select internal or external power sources.

Question 9

What is the function of the load voltage selector switch on a load bank?

Answer 9

It allows load bank to be configured for different generator output voltages.

Question 10

What is the function of the master load switch on a load bank?

Answer 10

It connects the generator power to the circuit breakers for the kW step switches.

Question 11

What is the function of the AC ammeter on a load bank?

Answer 11

It indicates the amperage being drawn by the load bank from the generator.

Question 12

What is the function of the internal blower on a load bank?

Answer 12

It removes heat from the load bank resistor elements.

Question 13

What does testing generators with a load bank prevent?

Answer 13

This provides the generator with enough load to prevent carbon buildup known as wet stacking.

Question 14

Why should you wear leather gloves when handling electrical cables?

Answer 14

To prevent injury.

Question 15

What should you do before you operate any piece of equipment that you are unfamiliar with?

Answer 15

Read the manufacturer’s manual.

Question 16

When inspecting the load bank, what should you look for inside the load bank housing?

Answer 16

Search for any debris or foreign matter inside load bank that could be blocking airflow.

Question 17

What safety precaution should you observe if you are replacing the heater elements on a load bank?

Answer 17

Be sure that the heater elements have had time to cool completely before you begin your work.

Question 18

Describe galvanic corrosion.

Answer 18

It can be one of the most common forms of corrosion as well as one of the most destructive. It occurs when two dissimilar metal types are in contact with each other and moisture is introduced. Galvanic corrosion seriously degrades the softer of the two metals.

Question 19

How does pitting first appear on a metal surface?

Answer 19

As a gray or white powdery substance.

Question 20

What is the key to a good corrosion control program?

Answer 20

Preventive maintenance.

Question 21

What are the two types of coolant heaters?

Answer 21

Circulating and immersion.

Question 22

How do immersion coolant heaters spread heat throughout the engine?

Answer 22

By convection.

Question 23

Why is it important that you do not use starting fluid on engines that are equipped with glow plugs?

Answer 23

Using starting fluid can cause an explosion that can damage the engine and cause injury to you.

Question 24

What is the only safe method of using ether?

Answer 24

With a closed dispensing system.

Question 25

30. (009) What battery charger component decreases the input voltage to the required output voltage to provide the battery with a charge? a. Voltmeter. b. Load switch. c. Power diode. d. Power transformer.

Answer 25

D. Power Transformer

Question 26

31. (009) Which battery charger component rectifies alternating current output of power transformer to direct current? a. Voltmeter. b. Load switch. c. Power diode. d. Power transformer.

Answer 26

C. Power Diode

Question 27

32. (009) What is the primary concern when adjusting a battery charger? a. Input voltage. b. Output voltage. c. Input amperage. d. Output amperage.

Answer 27

B. Output voltage

Question 28

33. (009) What battery charger fault situation is indicated by a fully charged battery and a high charging rate? a. Defective rectifier circuit. b. Defective voltage regulator. c. Open battery connections. d. Shorted battery.

Answer 28

B. Defective Voltage Regulator

Question 29

34. (010) Which load bank control contains reconnection bars that can be removed and configured according to the voltage input from the generator? a. Volts select switch. b. Blower fail indicator. c. kW load step switches. d. Voltage reconnection panel.

Answer 29

D. Voltage reconnection panel

Question 30

35. (010) Which load bank control is a series of switches used to select a specific resistive load value from the generator? a. Volts select switch. b. Blower fail indicator. c. kW load step switches. d. Voltage reconnection panel.

Answer 30

C. KW load step switches

Question 31

36. (010) Which load bank control is used to check voltage between phases of generator output during three-phase operation? a. Volts select switch. b. Blower fail indicator. c. kW load step switches. d. Voltage reconnection panel.

Answer 31

A. Volts Select Switch

Question 32

37. (010) Which load bank control illuminates if the blower fails? a. Volts select switch. b. Blower fail indicator. c. kW load step switches. d. Voltage reconnection panel.

Answer 32

B. Blower Fail Indicator

Question 33

38. (010) What is the purpose, besides preventing carbon buildup, of operating a generator using a load bank? a. It makes the engine smoke more. b. It makes the engine operate at a higher speed. c. It lets you know that the generator will operate with clean fuel. d. It lets you know that the generator is capable of operating at full load

Answer 33

D. It lets you know that the generator is capable of operating at full load.

Question 34

39. (010) When you must connect the load bank cables to the ends of the generator output cable, you must a. plug the connections into the cables properly. b. wrap the connections with insulating tape. c. leave the connections bare to allow proper cooling. d. operate the load bank at 80 percent capability to prevent overheating the connections.

Answer 34

A. Plug the connections into the cables properly

Question 35

40. (010) How will you know where to place the reconnection bars to set them for the proper voltage? a. The position of the switch on the generator. b. The position of the switch on the load bank. c. A diagram of configuration on the generator. d. A diagram of configuration on the load bank.

Answer 35

A. The position of the switch on the generator

Question 36

41. (010) Before you install an electrical component on a load bank, be sure it a. is the same size as the one being replaced. b. is the same color as the one being replaced. c. has the same manufacturer as the one being replaced. d. has the same electrical rating as the one being replaced.

Answer 36

D. Has the same electrical rating as the one being replaced.

Question 37

42. (011) Which type of corrosion do we find most on aluminum? a. Stress. b. Pitting. c. Galvanic. d. Exfoliation.

Answer 37

B. Pitting

Question 38

44. (011) What is the key to a good corrosion control program? a. Catching it early. b. Preventive maintenance. c. Cleaning it when you find it. d. Cleaning it when it gets severe.

Answer 38

B. Preventative maintenance

Question 39

45. (012) Which coolant heater has the main advantage of warming the engine in a very short period of time? a. Blanket. b. Immersion. c. Direct heat. d. Circulating.

Answer 39

D. Circulating

Question 40

46. (012) Which coolant heater is installed internally in the engine block in place of a freeze plug? a. Blanket. b. Circulating. c. Direct heat. d. Immersion.

Answer 40

D. Immersion

Question 41

47. (012) What is the only safe method of using ether in an engine? a. Spray can. b. Liquid mixture. c. Open dispensing system. d. Closed dispensing system.

Answer 41

D. Closed dispensing system