Deck 16: Truck Trailer Refrigeration Electrical Components

Question 1

If performing an open circuit voltage test a fully charge battery should read approximately _______ with a direct current volt meter.

A) 12.66 volts
B) 12.48 volts
C) 12.30 volts
D) 11.76 volts

Answer 1

A

Question 2

When boosting the battery of a refrigeration unit what is the last battery connection to be made?

A) Positive jumper cable to the positive (+) post of the stalled battery.
B) Connect one end of the negative jumper cable to the negative (-) post of the jumper battery.
C) Connect one end of the negative jumper cable to a good chassis ground connection on the stalled unit away from the stalled battery.
D) Connect the positive end of the jumper cable to the positive (+) of the jump starting battery.

Answer 2

C

Question 3

When water must be replenished in a battery it should be:

A) Filled till the fluid level reaches the vents
B) Level with the top of the plates
C) Just below the top of the plates
D) 1/8 inch below the vents

Answer 3

D

Question 4

The liquid found within the battery is commonly referred to as:

A) Water
B) Electrolyte
C) Acid
D) The wet charge

Question 5

In regards to a starter motor an one-way clutch is often referred to as:

A) A drive pinion
B) Overrunning clutch
C) Gear reduction
D) A plunger

Question 6

What is the best temperature to store a battery at?

A) 80°F to 90°F (26.6°C to 32.2°C)
B) 70°F to 80°F (21.1°C to 26.6°C)
C) 50°F to 60°F (10°C to 15.5°C)
D) 30°F to 40°F (-1.1°C to 4.4°C)

Question 7

When charging a battery you find that the rate of charge has caused the batteries electrolyte to start gassing. You should:

A) Increase the rate of charge
B) Maintain the current rate of charge
C) Decrease the rate of charge to a slow rate of 6 to 10 amps
D) Turn the charger off because the battery is now fully charged

Question 8

What should the specific gravity rating be while using a hydrometer on a fully charged battery at 70°F (21.1°C)?

A) 1.269
B) 1.265
C) 1.261
D) 1.257

Question 9

Cold cranking amps is the load in amperes that a battery can sustain for 30 seconds at 0°F (-17°C) and not fall below ______ volts on a 12 volt battery.

A) 6.8
B) 7.2
C) 8.4
D) 9.6

Question 10

Battery cases and terminals should be cleaned with:

A) Soap and water
B) Engine shampoo
C) A solution of baking soda and water
D) A steam cleaner

Question 11

The engine of a refrigeration unit may shut down if:

A) The engine has low oil pressure
B) The engine water temperature is too high
C) The refrigerant discharge pressure is too high
D) All three of these conditions can cause a unit to shut off unexpectedly

Question 12

Which component within the alternator converts AC voltage into DC voltage?

A) The field diode
B) The voltage regulator
C) The rectifier diodes
D) The stator windings

Question 13

Of the following, which element is required to produce voltage by chemical reaction?

A) Lead dioxide
B) Spongy lead
C) Electrolyte
D) All three components are required to produce voltage

Question 14

What should the minimum voltage be while using a commercial battery load tester on a battery that is approximately 40°F (4.4°C)?

A) 9.6 volts
B) 9.5 volts
C) 9.4 volts
D) 9.3 volts

Question 15

Which of the following statements is correct in regards to battery reserve capacity?

A) This rating indicates the number of minutes a new fully charge battery at 80° F (26.6° C ) can sustain a load of 25 amperes before the battery voltage draw at 1.75 volts per cell or 10.5volts for a 12 volt battery.
B) This rating indicates the number of minutes a new fully charge battery at 70° F (21.1° C ) can sustain a load of 25 amperes before the battery voltage draw at 2.0 volts per cell or 12.2 volts for a 12 volt battery.
C) Indicates how long a battery can provide enough power to keep the ignition, head and tail lights, windshield wipers, and heater operating if the battery is fully charged.
D) Both statements A and C are correct