Deck 11: Heating Ventilation and Air Conditioning Systems

Question 1

Two technicians are discussing coil springs. Technician A says that coil springs are installed on semi-trucks. Technician B says that coil springs can be variable rate to handle additional loads. Who is correct?

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

Answer 1

B

Question 2

An EMT is designed to run long term even with a puncture.

Answer 2

False

Question 3

Two technicians are discussing wheel alignment. Technician A says that wheels that are out of alignment can affect tire wear. Technician B says that many vehicles require heating and bending of components to align them. Who is correct?

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

Answer 3

A

Question 4

Coil springs are commonly used on the front of passenger cars and light trucks.

Question 5

The power-steering switch in the pressure line of power-steering systems signals the PCM to lower the engine's idle speed during low-speed conditions.

Question 6

What is the last link between the steering wheel and the steering knuckle?

A) The tire rod
B) The power steering pump
C) The center link
D) The pitman arm.

Question 7

The suspension supports most of the vehicle's weight.

Question 8

Sway bars are designed to increase vehicle lean during turns.

Question 9

Two technicians are discussing alignment measurements. Technician A says that toe is the difference in distance between the front and rear edges of tires on the same axle. Technician B says that ride height is very important to alignments. Who is correct?

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

Question 10

Automatic ride control can tailor ride quality and ride height for a vehicle.

Question 11

Which value reflects the percentage of the height of the sidewall to the width of the tire?

A) aspect ratio
B) tread width
C) tire diameter
D) tread density

Question 12

Two technicians are discussing suspension system operation. Technician A says that sprung weight is usually everything mounted above the axles. Technician B says that engineers try to reduce sprung mass by reducing the weight of the wheels and suspension components. Who is correct?

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

Question 13

Independent suspensions require both wheels to move at the same time.

Question 14

Which statement is true of tire balancing?

A) A computerized balancer is required for static balancing.
B) Dynamic balancing is usually done on heavy truck or trailer tires
C) Static balancing is performed by adding a weight equal to the heavy spot on the opposite rim of the wheel
D) In static balancing, the tire is theoretically divided into quarters and each quarter is balanced to the others.

Question 15

In the radial ply tire, the cords are laid _____ to the tread.

A) 90 degrees
B) parallel
C) 45 degrees
D) 20 degrees

Question 16

Two technicians are discussing tire treads. Technician A says that straight treads are for large vehicles which require traction for starting and stopping the vehicle. Technician B says that all-weather treads provide good traction on dry or wet roads. Who is correct?

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

Question 17

MacPherson struts are lighter and more compact than traditional suspension components.

Question 18

Newer vehicles offer electronic tire pressure monitors to help drivers maintain the safety of their vehicle.

Question 19

The steering knuckle on a rack-and-pinion system is very similar to the parallelogram system.

Question 20

Two technicians are discussing bias ply tires. Technician A says bias ply tires contribute to a smooth ride. Technician B says that bias ply tires are used on larger trucks and trailers today. Who is correct?

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

Question 21

What is the proper adjustment order for performing an alignment?

Question 22

Which statement is true of torsion bars?

A) Torsion bars are short, square, steel bars.
B) Torsion bars are manufactured to twist and return to their original condition.
C) Torsion bars make it difficult to adjust the ride height.
D) Torsion bars are typically less stiff than a coil spring.

Question 23

What is a TPMS in newer vehicles?

Question 24

What suspension system component controls spring oscillation?

Question 25

What type of steering system utilizes a steering gearbox?

Question 26

How are SAI and setback angle issues repaired?

Question 27

Describe what purpose a TPC number serves.

Question 28

What part of the suspension system helps control body lean during turns to help maintain vehicle control?

Question 29

Which arm is connected between the steering gearbox and the center link?

Question 30

Two technicians are discussing leaf springs. Technician A says that leaf springs offer a more comfortable ride than standard coil springs. Technician B says that monoleaf springs are typically found on standard passenger cars. Who is correct?

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

Question 31

Describe sprung and unsprung weight.

Question 32

What is the most common type of passenger car tire today?

Question 33

What type of tread is most appropriate for a large over-the-road vehicle?

Question 34

Shock absorbers _____.

A) support the vehicle weight
B) include a nonextendable cylinder
C) control spring movement and oscillation
D) eliminate side-to-side motion of the vehicle

Question 35

What type of springs are typically used on the front of passenger cars and light trucks?

A) Coil springs
B) Air springs
C) Leaf springs
D) Plastic springs

Question 36

What is a vehicle's center of gravity?

Question 37

Which statement is true of control arms?

A) Control arms connect the torsion bars and the vehicle frame.
B) Control arms are mounted with copper bushings.
C) Control arms may be two different lengths on the same wheel position.
D) Leaf springs are normally mounted between the control arms.

Question 38

What type of material comprises a coil spring?

Question 39

What is the term for a tire moving up into the wheelwell when the wheel hits a high spot like a rock?

Question 40

What component replaces a shock absorber and a control arm?