Deck 36: Mechanical Systems

Question 1

Technician A says heater hoses from the water pump circulate water through the heat exchanger / heater core under the dash to warm the interior of the vehicle. Technician B says the coolant should always be filled to the hot fill line on the coolant reserve reservoir. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Answer 1

A

Question 2

Technician A says an inertia switch is used to stop the flow of fuel in the event of an accident to avoid the possibility of fire. Technician B says the EVAP is used to re-direct the evaporating gas vapors into the exhaust system. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Answer 2

A

Question 3

Technician A says when doing a pressure check of the cooling system it should be pressurized to approximately 15 pounds over the normal operating pressure. Technician B says the cooling system should be pressurized and then the pressurizing pump should be left attached to ensure the pressure does not drop indicating a leak. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Answer 3

B

Question 4

Technician A says the supplemental restraint system includes the seat belts as well as all the air bags. Technician B says the supplemental restraint system is not designed to deploy until the vehicle is moving at a minimum speed. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 5

Technician A says air conditioning systems utilize the laws of thermodynamics. Technician B says in an air conditioning system, the condenser releases the heat to the outside air. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 6

Technician A says the thermostat is incorporated into the cooling system to control the temperature in the vehicle cabin. Technician B says the ratio for coolant should be two parts water to one part coolant. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 7

When coolant is added to the cooling system it should be a _____________mixture of water and coolant.

Question 8

The manual transmission is shifted by the operator to accelerate and to decelerate.

Question 9

Technician A says the engine is usually mounted transversely on a front wheel drive vehicle. Technician B says the differential reverses the spinning energy from the engine from one direction to the opposite. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 10

Evaporation is best explained as gas becoming a liquid.

Question 11

The cooling system in most vehicles is a closed water system.

Question 12

The water pump is either electrical or ____________________, in which case it is driven by a belt.

Question 13

Which of the following is not a part of the air conditioning system?

A) Desiccant
B) Receiver/dryer
C) Expansion valve
D) Thermostat

Question 14

Technician A says the fuel pump may be driven by the camshaft. Technician B says the fuel pump is usually replaced when damaged, as it is not a repairable part. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 15

The _______________ joint is at the wheel end of the drive shaft on a front wheel drive system.

Question 16

Technician A says dual air bags are required on all late model cars. Technician B says side curtain air bags deploy only during an imminent rollover. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 17

Fuel pumps are either mechanical or ______________________.

Question 18

Noise, vibration and harshness is often abbreviated as ___________.

Question 19

The radiator in an automobile serves as a heat exchanger.

Question 20

The compressor pressurizes the liquid refrigerant in an air conditioning system causing it to vaporize.

Question 21

Discuss why antifreeze is added to water for cooling the engine.

Question 22

Discuss why when the cooling system is completely empty the front of the vehicle should be slightly raised when installing the coolant.

Question 23

Discuss what should be done when repairs are made around the air bag sensors or near the air bag.

Question 24

Discuss how the cooling system functions to cool the engine and keep it from over-heating.

Question 25

Discuss the steps that must be taken when disarming the air bags in a conventional vehicle.