Control Systems

Question 1

Which of the following warning devices indicates there is inadequate pressure in the air brake system?

a. Coolant Level Alarm

b. Oil Level Alarm

c. Low Pressure Warning Alarm/Light

d. Oil Pressure Warning Light

Answer 1

C. Low Pressure Warning Alarm/Light

Question 2

A commercial motor vehicle’s (CMV’s) engine controls are used to:

a. safely operate your vehicle.

b. start up and shut down the vehicle’s engine.

c. warn you when pressures or temperatures reach a dangerous level.

d. help you steer, accelerate, brake, and park your CMV.

Answer 2

b. start up and shut down the vehicle’s engine

Question 3

If your CMV has a _____, the Federal Motor Carrier Safety Regulations (FMCSR) say you must use it.

a. seat heater

b. cruise control

c. seat belt

d. fog lamps

Answer 3

C. Seat Belt

Question 4

If your truck has a(n) _____, you must first turn the engine key to the ‘on’ position before engaging it.

a. starter button

b. engine break

c. clutch button

d. cruise control

Answer 4

A. Starter Button

Question 5

Secondary vehicle controls:

a. provide backup functionality to the primary controls.

b. shut down the vehicle’s engine in an emergency.

c. assist you in safely operating your vehicle.

d. all of the above.

Answer 5

C. Assist you in safely operating your vehicle

Question 6

What is a normal operating range for a CMV’s oil pressure gauge?

a. 20-45 psi

b. 30-50 psi

c. 40-65 psi

d. 50-70 psi

Answer 6

B. 30-50 psi

Question 7

Which clutch position is required to start the engine or shift gears?

a. Engaged

b. Free play

c. Disengaged

d. Clutch brake

Answer 7

C. Disengaged

Question 8

Which of the following is a yellow, diamond-shaped knob that allows you to activate the parking brake?

a. Parking brake control valve

b. Trailer air supply valve

c. Foot brake control valve

d. Trailer brake hand-control valve

Answer 8

A. Parking brake control valve

Question 9

Which of the following warning devices help you to know when exhaust temperatures are abnormal?

a. Pyrometer warning light

b. Coolant temperature warning light

c. Differential warning light

d. Both A and B

Answer 9

A. Pyrometer warning light

Question 10

Which vehicle instrument measures the voltage in a vehicle’s electrical system?

a. Voltmeter

b. Exhaust pyrometer

c. Ammeter

d. Both A and C

Answer 10

A. Voltmeter