Deck 14: Lubricating and Cooling Systems

Question 1

Which of the following cooling system hoses is normally subjected to the roughest service life?

A)upper radiator
B)lower radiator
C)heater inlet
D)bypass

Answer 1

A

Question 2

One purpose of the oil pan is cooling the oil through its contact with the outside air.

Answer 2

True

Question 3

In most automotive applications, the water pump is driven by the ______.

A)flywheel
B)camshaft
C)crankshaft
D)impeller

Answer 3

C

Question 4

Used coolant cannot be poured down the drain or into a sewer and must be reclaimed or recycled.

Question 5

A pressure relief (regulator)valve, located inside the oil filter, is designed to limit engine oil pressure.

Question 6

When must a thermostat be fully opened?

A)20 degrees Fahrenheit (11.1 degrees Celsius)above the "start to open temperature"
B)3 degrees Fahrenheit (1.67 degrees Celsius)above or below its temperature rating
C)3 degrees Fahrenheit (1.67 degrees Celsius)above its temperature rating
D)20 degrees Fahrenheit (11.1 degrees Celsius)below the "start to open temperature"

Question 7

When crankcase pressure is abnormally low, oil is forced out through joints that normally would not leak.

Question 8

The typical recommended mixture of water and antifreeze is ______.

A)30/70
B)50/50
C)40/60
D)60/40

Question 9

Most manufacturers recommend that cooling systems should be drained, flushed, and filled every ______.

A)six months
B)year
C)two to four years
D)five years

Question 10

ECD (electrochemical degradation)usually occurs within two inches of the hose end.

Question 11

The water pump on many late model engines is driven by the engine's timing belt or timing chain.

Question 12

For every 1 pound of pressure put on engine coolant, the boiling point of the coolant is raised about _____ degrees Fahrenheit (_____ degrees Celsius).

A)2, 1.1
B)3, 1.7
C)4, 2.2
D)5, 2.8

Question 13

Most hybrids require special coolants that serve to cool the engine and inverter assembly.

Question 14

The radiator cap should be removed only when the engine is at full operating temperature.

Question 15

To save power and reduce noise levels, most late model vehicles have an electrically driven cooling fan.

Question 16

Water pump failure can be caused by a bent fan blade.

Question 17

Normally between 30 and 50 percent of the engine's coolant remains in the system after the radiator has been drained.

Question 18

Which of the following tools can be used to test the operation of the thermostat without removing it from the engine?

A)black light and leak detector dye
B)combustion leak check dye
C)cooling system pressure tester
D)digital infrared thermometer

Question 19

Technician A says a cooling system pressure tester is used to test for leaks in the radiator, hoses, water pump, thermostat, and engine assembly. Technician B say the cooling system pressure tester is used to check the operation of the relief valve in the radiator cap. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 20

Which of the following is a function of the engine's lubrication system?

A)holds an adequate supply of oil
B)removes contaminants from the oil
C)delivers oil to all necessary areas of the engine
D)All the answers are correct.

Question 21

If the engine overheats during long periods of idling but runs normally at highway speeds, the problem is most likely defective _____.

A)thermostat
B)water pump
C)cooling fan
D)radiator

Question 22

What does blue exhaust smoke indicate?

A)oil entering the combustion chamber
B)coolant entering the combustion chamber
C)excessively rich fuel mixture
D)All the answers are correct.

Question 23

Water pumps are _____ type pumps.

A)positive displacement
B)negative displacement
C)centrifugal
D)reciprocating

Question 24

Technician A says cooling system pressure is regulated by the pressure relief valve in the water pump. Technician B says cooling system pressure is regulated by the radiator cap. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 25

Oil coolers are normally found on _____ vehicles.

A)diesel
B)high performance
C)turbocharged
D)All the answers are correct.

Question 26

To drain a cooling system that does not have a petcock or drain plug in the radiator, ______.

A)remove the coolant temperature sensor
B)remove the heater return hose
C)disconnect the water pump inlet hose
D)disconnect the lower radiator hose

Question 27

The oil pressure ____________________ valve prevents excessively high system pressure from occurring as engine speed is increased.

Question 28

Technician A says an electric cooling fan may come on at any time without warning, even if the engine is not running. Technician B says an electric cooling fan may be controlled by the engine control computer. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 29

The petcock valve is located _____.

A)at the bottom of the radiator
B)at the base of thermostat housing
C)at the bottom of the heater core
D)below the water pump

Question 30

Two technicians are discussing oil filters. Technician A says the oil filter has an anti-drain-back valve that prevents the oil in the filter and engine oil passages from returning to the sump when the engine is shut down. Technician B says the oil filter has a bypass valve that in the event the filter becomes plugged, oil can flow directly to the bearings. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 31

Technician A says high crankcase pressure can be caused by worn piston rings. Technician B says low crankcase pressure can be caused by a faulty PCV system. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 32

Sludge is being discussed. Technician A says sludge results from the oxidation of oil. Technician B says a slight buildup on the underside of the oil fill cap is normal. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 33

Which hose typically has a spiral wire reinforcement?

A)upper radiator hose
B)lower radiator hose
C)Both A and B
D)Neither A nor B

Question 34

During engine warm-up, when the thermostat is closed, _____.

A)coolant flows through the radiator
B)coolant flows through the bypass passage
C)both A and B
D)neither A nor B

Question 35

Two technicians are discussing a car with a very noisy water pump. The pump makes a lot of noise but is not leaking coolant. Technician A says the owner can continue to drive the vehicle as long as there are no signs on coolant leakage. Technician B says the water pump must be replaced immediately. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 36

During routine service a small amount of engine oil is found in the air cleaner housing. Technician A says the PCV valve may be clogged. Technician B says the engine could be overfilled with oil. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 37

Technician A says a dry sump lubrication system eliminates the possibility of oil sloshing and possible oil starvation during hard cornering, braking, and acceleration. Technician B says a dry sump lubrication system allows the engine to be mounted higher in the frame. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 38

Two technicians are discussing a vehicle with an overheating problem. There are no leaks, internal or external. The belts are in good condition, and the radiator has been removed and flow tested. Everything appears to be in good condition. A new thermostat was installed, but it did not cure the problem. What is most likely the problem?

A)The impeller could be slipping on the water pump shaft.
B)The impeller blades could be corroded.
C)The impeller could be slipping on the water pump shaft or the impeller blades could be corroded.
D)None of the answers is correct.

Question 39

When testing a radiator cap, with the rated pressure applied, the cap should hold that pressure for at least _____.

A)30 seconds
B)1 minute
C)5 minutes
D)20 minutes

Question 40

If the fan shroud is removed from a vehicle, _____.

A)the engine will overheat during prolonged idling
B)the engine will overheat at highway speeds
C)both A and B
D)neither A nor B

Question 41

A(n)____________________ cooling system has an expansion tank or recovery tank.

Question 42

What is the purpose of a radiator petcock?

Question 43

Metal temperatures around the combustion chamber can run as high as ____________________ degrees Fahrenheit.

Question 44

Describe how to check a fan clutch.

Question 45

Engine oil passages are often referred to as oil ways or ____________________

Question 46

Identify causes of water pump failure.

Question 47

Most oil pressure gauges are ____________________ controlled.

Question 48

What is the function of a fan clutch?

Question 49

What is the function of the thermostat?

Question 50

What is the function of a radiator pressure cap?

Question 51

A voltmeter is used to check the cooling system for ____________________.

Question 52

Hose sizes are based on their ____________________  diameter.

Question 53

Engine oil pumps have ____________________ displacement.

Question 54

The ____________________ is used to measure the level of oil in the oil pan.

Question 55

Most cooling systems use an expansion or ____________________ tank.

Question 56

When is a fan shroud required?

Question 57

A ____________________ system provides a continuous flow of fresh air through the crankcase to relieve pressure and prevent the formation of corrosive contaminants in the crankcase.

Question 58

When using a combustion gas leak check: the color of the fluid turns from blue to ____________________ if there are combustion gases in the coolant.

Question 59

____________________ is a term used to describe the gases that escape the combustion chamber and enter the crankcase.

Question 60

When the radiator cap is not the highest point in the cooling system, how is the trapped air in the cooling system removed?

Question 61

What are the component parts of a radiator?

Question 62

What is the function of a pressure relief valve in an oil pump?