Unit 3

Question 1

Which oil pressure gauge uses direct pressure on the gauge to indicate the pressure?

Answer 1

Mechanical

Question 2

Identify a protective device that shuts the engine down if oil pressure gets low

Answer 2

Oil pressure switch

Question 3

Which component does oil pass through to flow to the piston pin and piston?

Answer 3

Connecting rod

Question 4

What is one way oil is transported to the valve train components?

Answer 4

Hollow push rods

Question 5

Which type of oil or coolant levels can reduce the cooling capacity of the oil storage system?

Answer 5

Low oil

Question 6

Which component collects most contaminates in the lubricating oil?

Answer 6

Oil filter

Question 7

You are adding new oil into the system; before you close the drain to push the oil oil remaining in the bottom of the sump out, when do you close the drain?

Answer 7

Once the oil pouring out of the drain becomes clear

Question 8

The type of oil filter you would use a strap wrench in order to loosen the filter body is the

Answer 8

Spin on filters

Question 9

In addition to sulfur what other substance from the fuel may get into the engine oil and form sulfuric acid?

Answer 9

Water from the cooling system or condensation

Question 10

What is the dilution level of fuel of the test sample you create by adding fuel to a sample of new oil?

Answer 10

5 percent

Question 11

Which oil testing method uses a computer analysis process that provides you with a detailed look at the engine oil?

Answer 11

Spectrometric Oil Analysis Program (SOAP)

Question 12

Where must you document oil test results?

Answer 12

Inspection Checklist for the Generator Operating Log and AF IMT 719

Question 13

What is your first step in removing the oil cooler from the engine?

Answer 13

Drain the coolant

Question 14

What is a possible cause of excessive crankcase pressure?

Answer 14

Cylinder blow by

Question 15

What type of situation causes the need to use a wire-reinforced hose in the cooling system to prevent the lower radiator hose collapse?

Answer 15

High suction from the water pump

Question 16

Which component collects the heat from the coolant in a radiator to transfer it to the air?

Answer 16

Fins

Question 17

What does antifreeze change in water when you mix it with water lowering the freezing point?

Answer 17

Specific gravity

Question 18

Identify what drives the fan on an air cooled engine either directly or through gears?

Answer 18

Crankshaft

Question 19

Which portion of the engine does coolant enter the engine to ensure there is always coolant in contact with all internal engine components?

Answer 19

Lower

Question 20

At what pressures do most cooling systems operate?

Answer 20

10 to 15 psi

Question 21

What opens a valve on the radiator cap, thus allowing coolant to move from the expansion tank to the radiator?

Answer 21

Pressure

Question 22

How do you add antifreeze to an engine while it is operating?

Answer 22

Mix it thoroughly with a small amount of water

Question 23

You inspect the water pump impeller’s ceramic seal for

Answer 23

chips, cracks, and rough conditions

Question 24

When you are inspecting a radiator, what component must be straight and free of debris?

Answer 24

Fins

Question 25

Identify the most common cause of leaks with hoses in a cooling system?

Answer 25

Corroded hose connectors