Deck 14: Lubricating and Cooling Systems

Question 1

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

Answer 1

False

Question 2

ECD [electrochemical degradation] usually occurs within two inches of the hose end-not in the middle.

Answer 2

True

Question 3

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

Answer 3

True

Question 4

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

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

Question 5

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 6

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

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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 11

Hoses are sized based on their ______.

A) inner diameter
B) outer diameter
C) both "inner diameter" and "outer diameter"
D) neither "inner diameter" nor "outer diameter"

Question 12

Special coolants are required on most hybrids as the coolant cools the engine and inverter assembly.

Question 13

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

Question 14

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

Question 15

A typical oil pump pickup filter screen serves to keep microscopic contaminants from reaching the oil pump.

Question 16

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

Question 17

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

Question 18

Oil pressure is determined by whether the pump is a gear type or rotor type and by oil clearances, the pump's pressure regulator valve, and oil viscosity.

Question 19

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

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 answers are correct

Question 21

Which hose typically has a spiral wire reinforcement?

A) upper radiator hose
B) lower radiator hose
C) both "upper radiator hose" and "lower radiator hose"
D) neither "upper radiator hose" nor "lower radiator hose"

Question 22

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 lower in the frame, improving handling. Who is correct?

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

Question 23

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. Technician A says the impeller could be slipping on the water pump shaft. Technician B says the impeller blades could be corroded. Who is correct?

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

Question 24

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 25

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 26

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

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

Question 27

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 28

The typical recommended mixture of water and antifreeze is ______.

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

Question 29

Water pumps are _____ type pumps.

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

Question 30

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

Question 31

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 32

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 33

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 34

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 35

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) all answers are correct

Question 36

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 37

Technician A says the American Petroleum Institute has established an oil viscosity classification system. Technician B says thick viscosity oils receive high rating numbers. Who is correct?

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

Question 38

Oil coolers are normally found on _____ vehicles.

A) diesel
B) high performance
C) turbocharged
D) all answers are correct

Question 39

Blue exhaust smoke is an indication of ______.

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

Question 40

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 41

Identify causes of water pump failure.

Question 42

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

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

Question 43

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

Question 44

Engine oil pumps have ____________________ displacement.

Question 45

Most oil pressure gauges are ____________________ controlled.

Question 46

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

Question 47

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

Question 48

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 49

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

Question 50

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

Question 51

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

Question 52

What is the function of a radiator pressure cap?

Question 53

When installing an oil pump in an engine: Technician A packs the pump with petroleum jelly. Technician B submerges the pump in clean oil and rotates the pump shaft to fill the pump body. Who is correct?

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

Question 54

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 55

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

Question 56

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 57

What is the purpose of a radiator petcock?

Question 58

Most cooling systems use an expansion or ____________________ tank.

Question 59

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 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 is the function of the thermostat?

Question 62

What is the function of a fan clutch?

Question 63

Describe how to check a fan clutch.

Question 64

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

Question 65

What are the component parts of a radiator?

Question 66

When is a fan shroud required?