Michigan Commercial Driver License
Instructor Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. When teaching pre-trip inspection procedures to a CDL student, the
instructor should explain that the primary purpose of the inspection is
to:
A. Reduce paperwork during a roadside inspection
B. Identify unsafe conditions before driving
C. Complete a checklist for department records
D. Speed up the vehicle preparation process
The primary purpose of a pre-trip inspection is to find unsafe
conditions before a vehicle is driven, which helps prevent accidents
and mechanical failures.
2. In commercial driver training, the concept of over-adjustment of
mirrors refers to mirrors being set:
A. Too high to see the road surface
B. To show only the vehicle’s exhaust system
C. To show the blind spot instead of the lane beside the vehicle
D. So they vibrate excessively at highway speeds
Over-adjustment occurs when mirrors show the blind spot rather
than the intended adjacent lane, reducing visibility of other traffic.
3. The most important factor in safely completing a backing maneuver is
to:
A. Back as quickly as possible to reduce time on the roadway
, B. Keep front wheels turned to the left
C. Use a helper and communicate effectively
D. Always look only through the rear-view camera
Using a helper and clear communication is critical because it
enhances awareness of hazards that the driver alone cannot see.
4. When explaining the four-second rule to a student, the instructor
should indicate that it applies to:
A. Maximum air brake lag time
B. Engine warm-up periods in cold weather
C. Timing rest breaks on long trips
D. Following distance under ideal conditions
The four-second rule is a following distance guideline under ideal
conditions to maintain safe space between vehicles.
5. A CDL instructor must stress that hydroplaning risk increases when:
A. Roadway temperatures fall below freezing
B. Water depth and speed both increase
C. Traffic is light and speeds are low
D. Tires are newer and well-treaded
Hydroplaning becomes more likely as water depth and vehicle speed
increase, reducing tire contact with the road.
6. When teaching about brake system checks, the instructor should
emphasize that air brake systems must build from 85 to 100 psi within:
A. 5 minutes of idle time
B. 1 minute at operating speed
C. 3 minutes at 600–900 rpm
D. 30 seconds with brakes released
Air brake systems are required to build pressure within three minutes
at 600–900 engine rpm to ensure operational readiness.
7. An instructional objective that is measurable and observable must
include which component?
A. A personal opinion of performance
B. A vague description of behavior
C. An unrelated distractor skill
D. A specific performance criterion
, Measurable and observable objectives require a clear performance
criterion to assess if the student met it.
8. When introducing students to cargo securement, the instructor should
define the Working Load Limit (WLL) as:
A. Maximum load the vehicle can carry legally
B. Maximum load a tie-down device can restrain
C. Weight of cargo minus delivery stops
D. Load that always equals Gross Vehicle Weight Rating
WLL refers to the maximum load that a specific tie-down can safely
restrain during transport.
9. To effectively teach proper shifting techniques, an instructor should
first explain the purpose of:
A. Cruise control settings
B. Fuel injection systems
C. Engine rpm matching to road speed
D. Wind resistance on gear choice
Students must understand how to match engine rpm to speed to shift
smoothly and efficiently.
10. A CDL instructor must explain that driver fatigue most commonly
occurs:
A. Within the first hour on the road
B. Only after 14 hours on duty
C. During low-stimulus driving conditions
D. Only in overnight driving
Fatigue is often caused by monotonous driving conditions that
reduce alertness, not just time behind the wheel.
11. When covering defensive driving, the instructor should
emphasize that scanning traffic effectively means looking:
A. Only at the vehicle’s front bumper
B. At roadside advertising for hazards
C. Far ahead, to the sides, and behind
D. Only in the direction of intended travel
Effective scanning includes checking all around the vehicle to
anticipate hazards well in advance.
Instructor Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. When teaching pre-trip inspection procedures to a CDL student, the
instructor should explain that the primary purpose of the inspection is
to:
A. Reduce paperwork during a roadside inspection
B. Identify unsafe conditions before driving
C. Complete a checklist for department records
D. Speed up the vehicle preparation process
The primary purpose of a pre-trip inspection is to find unsafe
conditions before a vehicle is driven, which helps prevent accidents
and mechanical failures.
2. In commercial driver training, the concept of over-adjustment of
mirrors refers to mirrors being set:
A. Too high to see the road surface
B. To show only the vehicle’s exhaust system
C. To show the blind spot instead of the lane beside the vehicle
D. So they vibrate excessively at highway speeds
Over-adjustment occurs when mirrors show the blind spot rather
than the intended adjacent lane, reducing visibility of other traffic.
3. The most important factor in safely completing a backing maneuver is
to:
A. Back as quickly as possible to reduce time on the roadway
, B. Keep front wheels turned to the left
C. Use a helper and communicate effectively
D. Always look only through the rear-view camera
Using a helper and clear communication is critical because it
enhances awareness of hazards that the driver alone cannot see.
4. When explaining the four-second rule to a student, the instructor
should indicate that it applies to:
A. Maximum air brake lag time
B. Engine warm-up periods in cold weather
C. Timing rest breaks on long trips
D. Following distance under ideal conditions
The four-second rule is a following distance guideline under ideal
conditions to maintain safe space between vehicles.
5. A CDL instructor must stress that hydroplaning risk increases when:
A. Roadway temperatures fall below freezing
B. Water depth and speed both increase
C. Traffic is light and speeds are low
D. Tires are newer and well-treaded
Hydroplaning becomes more likely as water depth and vehicle speed
increase, reducing tire contact with the road.
6. When teaching about brake system checks, the instructor should
emphasize that air brake systems must build from 85 to 100 psi within:
A. 5 minutes of idle time
B. 1 minute at operating speed
C. 3 minutes at 600–900 rpm
D. 30 seconds with brakes released
Air brake systems are required to build pressure within three minutes
at 600–900 engine rpm to ensure operational readiness.
7. An instructional objective that is measurable and observable must
include which component?
A. A personal opinion of performance
B. A vague description of behavior
C. An unrelated distractor skill
D. A specific performance criterion
, Measurable and observable objectives require a clear performance
criterion to assess if the student met it.
8. When introducing students to cargo securement, the instructor should
define the Working Load Limit (WLL) as:
A. Maximum load the vehicle can carry legally
B. Maximum load a tie-down device can restrain
C. Weight of cargo minus delivery stops
D. Load that always equals Gross Vehicle Weight Rating
WLL refers to the maximum load that a specific tie-down can safely
restrain during transport.
9. To effectively teach proper shifting techniques, an instructor should
first explain the purpose of:
A. Cruise control settings
B. Fuel injection systems
C. Engine rpm matching to road speed
D. Wind resistance on gear choice
Students must understand how to match engine rpm to speed to shift
smoothly and efficiently.
10. A CDL instructor must explain that driver fatigue most commonly
occurs:
A. Within the first hour on the road
B. Only after 14 hours on duty
C. During low-stimulus driving conditions
D. Only in overnight driving
Fatigue is often caused by monotonous driving conditions that
reduce alertness, not just time behind the wheel.
11. When covering defensive driving, the instructor should
emphasize that scanning traffic effectively means looking:
A. Only at the vehicle’s front bumper
B. At roadside advertising for hazards
C. Far ahead, to the sides, and behind
D. Only in the direction of intended travel
Effective scanning includes checking all around the vehicle to
anticipate hazards well in advance.
