TEXAS COMMERCIAL VEHICLE INSPECTOR EXAM 2026/2027
COMPLETE 200-QUESTION PRACTICE TEST WITH VERIFIED
ANSWERS & EXPERT RATIONALES | ULTIMATE CERTIFICATION
PREP GUIDE
QUESTION 1
What is the primary purpose of a commercial vehicle inspection
program?
A) Increase fuel efficiency for commercial fleets
B) Ensure roadway safety and regulatory compliance
C) Reduce driver salaries and operating costs
D) Improve vehicle aesthetics and appearance
✓ CORRECT ANSWER: B) Ensure roadway safety and regulatory
compliance
RATIONALE: Inspection programs are designed to protect public safety
by ensuring vehicles meet minimum operational standards and legal
requirements. The core regulatory objective is protecting the public on
roadways, not improving fuel efficiency, reducing costs, or enhancing
appearance.
QUESTION 2
Which endorsement is required for conducting commercial vehicle
inspections in Texas?
,A) Class A Endorsement
B) Commercial Certification Endorsement
C) Hazardous Materials Endorsement
D) Passenger Transport Endorsement
✓ CORRECT ANSWER: B) Commercial Certification Endorsement
RATIONALE: A Commercial Certification endorsement is specifically
required for conducting vehicle inspections on commercial motor
vehicles in Texas. This is distinct from other CDL endorsements and
requires additional training and testing beyond standard safety
inspector certification.
QUESTION 3
What is the minimum tread depth required for steering axle tires on
commercial vehicles?
A) 2/32 inch
B) 3/32 inch
C) 4/32 inch
D) 6/32 inch
✓ CORRECT ANSWER: C) 4/32 inch
RATIONALE: Federal Motor Carrier Safety Regulations (FMCSR) Part
393.75 requires steering axle tires to have a minimum tread depth of
4/32 inch. This is measured in at least two locations on the tire. Steering
tires require greater tread depth than other axles (2/32 inch) because
they directly affect vehicle control and steering response.
,QUESTION 4
What is the minimum tread depth required for drive axle and trailer
tires on commercial vehicles?
A) 1/32 inch
B) 2/32 inch
C) 3/32 inch
D) 4/32 inch
✓ CORRECT ANSWER: B) 2/32 inch
RATIONALE: FMCSR Part 393.75 requires non-steering axle tires (drive
and trailer tires) to have a minimum tread depth of 2/32 inch. This is
measured in major tread grooves. Steering tires require a higher
minimum of 4/32 inch due to their direct impact on vehicle control.
QUESTION 5
Which of the following is a commercial motor vehicle classification
under Texas DPS rules?
A) A vehicle with a GVWR of 8,000 lbs.
B) A vehicle with a GVWR greater than 26,000 lbs.
C) A passenger car used for commuting
D) A motorcycle with sidecar
✓ CORRECT ANSWER: B) A vehicle with a GVWR greater than 26,000
lbs.
RATIONALE: Texas DPS classifies vehicles with a Gross Vehicle Weight
Rating (GVWR) greater than 26,000 pounds as commercial motor
vehicles. This classification triggers specific inspection and regulatory
, requirements. Vehicles below this threshold generally do not qualify as
commercial motor vehicles under Texas DPS rules.
QUESTION 6
What does Out-of-Service (OOS) designation mean for a commercial
vehicle?
A) The vehicle can operate with restrictions
B) The vehicle cannot be operated and must be repaired before placing
in service
C) The vehicle needs inspection within 30 days
D) The vehicle can operate for short distances only
✓ CORRECT ANSWER: B) The vehicle cannot be operated and must be
repaired before placing in service
RATIONALE: Out-of-Service designation is a regulatory classification
indicating that a commercial vehicle is deemed unsafe and is prohibited
from operation until defects are corrected. This is a legal determination
based on specific criteria in FMCSR. Once issued, the vehicle cannot
legally be operated on public roads under any circumstances.
QUESTION 7
When inspecting coupling devices on a tractor-trailer unit, which
components are critically important for safety?
A) Only the fifth wheel locking mechanism
B) Fifth wheel integrity, locking mechanism, and kingpin condition
COMPLETE 200-QUESTION PRACTICE TEST WITH VERIFIED
ANSWERS & EXPERT RATIONALES | ULTIMATE CERTIFICATION
PREP GUIDE
QUESTION 1
What is the primary purpose of a commercial vehicle inspection
program?
A) Increase fuel efficiency for commercial fleets
B) Ensure roadway safety and regulatory compliance
C) Reduce driver salaries and operating costs
D) Improve vehicle aesthetics and appearance
✓ CORRECT ANSWER: B) Ensure roadway safety and regulatory
compliance
RATIONALE: Inspection programs are designed to protect public safety
by ensuring vehicles meet minimum operational standards and legal
requirements. The core regulatory objective is protecting the public on
roadways, not improving fuel efficiency, reducing costs, or enhancing
appearance.
QUESTION 2
Which endorsement is required for conducting commercial vehicle
inspections in Texas?
,A) Class A Endorsement
B) Commercial Certification Endorsement
C) Hazardous Materials Endorsement
D) Passenger Transport Endorsement
✓ CORRECT ANSWER: B) Commercial Certification Endorsement
RATIONALE: A Commercial Certification endorsement is specifically
required for conducting vehicle inspections on commercial motor
vehicles in Texas. This is distinct from other CDL endorsements and
requires additional training and testing beyond standard safety
inspector certification.
QUESTION 3
What is the minimum tread depth required for steering axle tires on
commercial vehicles?
A) 2/32 inch
B) 3/32 inch
C) 4/32 inch
D) 6/32 inch
✓ CORRECT ANSWER: C) 4/32 inch
RATIONALE: Federal Motor Carrier Safety Regulations (FMCSR) Part
393.75 requires steering axle tires to have a minimum tread depth of
4/32 inch. This is measured in at least two locations on the tire. Steering
tires require greater tread depth than other axles (2/32 inch) because
they directly affect vehicle control and steering response.
,QUESTION 4
What is the minimum tread depth required for drive axle and trailer
tires on commercial vehicles?
A) 1/32 inch
B) 2/32 inch
C) 3/32 inch
D) 4/32 inch
✓ CORRECT ANSWER: B) 2/32 inch
RATIONALE: FMCSR Part 393.75 requires non-steering axle tires (drive
and trailer tires) to have a minimum tread depth of 2/32 inch. This is
measured in major tread grooves. Steering tires require a higher
minimum of 4/32 inch due to their direct impact on vehicle control.
QUESTION 5
Which of the following is a commercial motor vehicle classification
under Texas DPS rules?
A) A vehicle with a GVWR of 8,000 lbs.
B) A vehicle with a GVWR greater than 26,000 lbs.
C) A passenger car used for commuting
D) A motorcycle with sidecar
✓ CORRECT ANSWER: B) A vehicle with a GVWR greater than 26,000
lbs.
RATIONALE: Texas DPS classifies vehicles with a Gross Vehicle Weight
Rating (GVWR) greater than 26,000 pounds as commercial motor
vehicles. This classification triggers specific inspection and regulatory
, requirements. Vehicles below this threshold generally do not qualify as
commercial motor vehicles under Texas DPS rules.
QUESTION 6
What does Out-of-Service (OOS) designation mean for a commercial
vehicle?
A) The vehicle can operate with restrictions
B) The vehicle cannot be operated and must be repaired before placing
in service
C) The vehicle needs inspection within 30 days
D) The vehicle can operate for short distances only
✓ CORRECT ANSWER: B) The vehicle cannot be operated and must be
repaired before placing in service
RATIONALE: Out-of-Service designation is a regulatory classification
indicating that a commercial vehicle is deemed unsafe and is prohibited
from operation until defects are corrected. This is a legal determination
based on specific criteria in FMCSR. Once issued, the vehicle cannot
legally be operated on public roads under any circumstances.
QUESTION 7
When inspecting coupling devices on a tractor-trailer unit, which
components are critically important for safety?
A) Only the fifth wheel locking mechanism
B) Fifth wheel integrity, locking mechanism, and kingpin condition
