Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
**Question 1.** During the engine compartment inspection, which fluid should
never be checked by opening its reservoir when the engine is hot?
A) Engine oil
B) Power steering fluid
C) Coolant
D) Transmission fluid
Answer: C
Explanation: Coolant can be under pressure and may cause burns if the radiator
or reservoir is opened while hot; it must be checked only when the engine is cool.
**Question 2.** When inspecting the engine oil dipstick, the oil level is
considered acceptable if the reading is between:
A) Full mark and the top of the dipstick
B) Low and high marks
C) Halfway and full marks
D) Below the low mark and the high mark
Answer: B
Explanation: The oil level must be between the low and high marks on the dipstick
to ensure proper lubrication.
**Question 3.** A cracked or bulging hose in the engine compartment most likely
indicates:
A) Normal wear
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
B) Over-tightened clamps
C) Potential fluid leak
D) Correct tension
Answer: C
Explanation: Cracks or bulges in hoses are signs of deterioration that can lead to
fluid leaks.
**Question 4.** The maximum allowable “play” in a drive belt is:
A) 1/8 inch
B) 1/4 inch
C) 1/2 inch
D) 3/4 inch
Answer: D
Explanation: Belt “play” should not exceed 3/4 of an inch; excessive play can
cause slipping.
**Question 5.** Which component is NOT typically belt-driven?
A) Alternator
B) Water pump
C) Air compressor (in many trucks)
D) Power steering pump
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
Answer: C
Explanation: Many air compressors are gear-driven, not belt-driven; the
alternator, water pump, and power steering pump are commonly belt-driven.
**Question 6.** When checking the power-steering fluid, a low level on the
dipstick indicates:
A) Over-filled system
B) Potential leak or low pump output
C) Normal operation
D) Excessive fluid temperature
Answer: B
Explanation: Low power-steering fluid suggests a leak or insufficient pump output,
which can affect steering assist.
**Question 7.** The steering column should be inspected for:
A) Bent shaft or cracked housing
B) Loose seat belt
C) Missing windshield wiper fluid
D) Faded paint
Answer: A
Explanation: A bent or cracked steering column compromises control and must be
repaired.
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
**Question 8.** Which part of the steering linkage must have a castle nut and
cotter pin present?
A) Tie rod end
B) Steering wheel rim
C) Dashboard gauges
D) Exhaust pipe
Answer: A
Explanation: Castle nuts and cotter pins secure tie-rod ends and prevent them
from loosening.
**Question 9.** A steering gearbox that is not securely mounted to the frame can
cause:
A) Reduced fuel efficiency
B) Excessive steering effort or failure
C) Engine overheating
D) Tire wear
Answer: B
Explanation: An unsecured steering gearbox may shift, leading to loss of steering
control.
**Question 10.** When inspecting leaf springs, a “shifted” spring indicates:
Ultimate Exam
**Question 1.** During the engine compartment inspection, which fluid should
never be checked by opening its reservoir when the engine is hot?
A) Engine oil
B) Power steering fluid
C) Coolant
D) Transmission fluid
Answer: C
Explanation: Coolant can be under pressure and may cause burns if the radiator
or reservoir is opened while hot; it must be checked only when the engine is cool.
**Question 2.** When inspecting the engine oil dipstick, the oil level is
considered acceptable if the reading is between:
A) Full mark and the top of the dipstick
B) Low and high marks
C) Halfway and full marks
D) Below the low mark and the high mark
Answer: B
Explanation: The oil level must be between the low and high marks on the dipstick
to ensure proper lubrication.
**Question 3.** A cracked or bulging hose in the engine compartment most likely
indicates:
A) Normal wear
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
B) Over-tightened clamps
C) Potential fluid leak
D) Correct tension
Answer: C
Explanation: Cracks or bulges in hoses are signs of deterioration that can lead to
fluid leaks.
**Question 4.** The maximum allowable “play” in a drive belt is:
A) 1/8 inch
B) 1/4 inch
C) 1/2 inch
D) 3/4 inch
Answer: D
Explanation: Belt “play” should not exceed 3/4 of an inch; excessive play can
cause slipping.
**Question 5.** Which component is NOT typically belt-driven?
A) Alternator
B) Water pump
C) Air compressor (in many trucks)
D) Power steering pump
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
Answer: C
Explanation: Many air compressors are gear-driven, not belt-driven; the
alternator, water pump, and power steering pump are commonly belt-driven.
**Question 6.** When checking the power-steering fluid, a low level on the
dipstick indicates:
A) Over-filled system
B) Potential leak or low pump output
C) Normal operation
D) Excessive fluid temperature
Answer: B
Explanation: Low power-steering fluid suggests a leak or insufficient pump output,
which can affect steering assist.
**Question 7.** The steering column should be inspected for:
A) Bent shaft or cracked housing
B) Loose seat belt
C) Missing windshield wiper fluid
D) Faded paint
Answer: A
Explanation: A bent or cracked steering column compromises control and must be
repaired.
, Illinois PreTrip Vehicle Inspection CDL
Ultimate Exam
**Question 8.** Which part of the steering linkage must have a castle nut and
cotter pin present?
A) Tie rod end
B) Steering wheel rim
C) Dashboard gauges
D) Exhaust pipe
Answer: A
Explanation: Castle nuts and cotter pins secure tie-rod ends and prevent them
from loosening.
**Question 9.** A steering gearbox that is not securely mounted to the frame can
cause:
A) Reduced fuel efficiency
B) Excessive steering effort or failure
C) Engine overheating
D) Tire wear
Answer: B
Explanation: An unsecured steering gearbox may shift, leading to loss of steering
control.
**Question 10.** When inspecting leaf springs, a “shifted” spring indicates:
