TEXAS CDL FUEL EFFICIENCY DRIVING EXAM - (50 QUESTIONS) LATEST UPDATED
ACTUAL EXAM QUESTIONS AND COMPLETE SOLUTIONS | VERIFIED ANSWERS
Examiner/Administrator: Texas Department of Public Safety
TEXAS COMMERCIAL DRIVER LICENSE
FUEL EFFICIENCY DRIVING ASSESSMENT
Professional Driver Knowledge Simulation
Candidate Name: _______________________________________
Candidate ID Number: __________________________________
Test Date: ____________________________________________
Testing Location: _____________________________________
Vehicle Classification: _________________________________
Instructor/Examiner Signature: ___________________________
CONFIDENTIAL EXAMINATION MATERIAL
DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED
,This assessment is designed to evaluate the applicant’s knowledge of fuel-efficient
commercial driving techniques, environmentally responsible vehicle operation, preventive
maintenance awareness, route management, and operational decision-making associated
with modern commercial transportation. The examination reflects competency expectations
commonly associated with Texas commercial driving standards for professional operators of
heavy vehicles and combination units. Candidates are expected to demonstrate sound
judgment regarding fuel conservation, safe acceleration practices, idle reduction, speed
management, trip planning, tire efficiency, and engine performance monitoring while
maintaining compliance with safety regulations and operational efficiency standards.
Core Competency Areas:
Fuel-Efficient Vehicle Operation
Trip Planning and Route Optimization
Speed and RPM Management
Engine and Transmission Efficiency
Preventive Maintenance Awareness
Idle Reduction Procedures
Aerodynamics and Load Management
Safe and Economical Braking Practices
Environmental Compliance
Driver Performance Monitoring
,Candidate Instructions: This examination contains approximately 50 multiple-choice
questions modeled after professional CDL knowledge assessments. The time allocation for
the complete examination is 90 minutes. Read each scenario carefully before selecting the
most appropriate answer. Only one answer is considered the best response for each question.
Use professional judgment based on safe and fuel-efficient commercial driving practices.
Mark all answers clearly. Calculators are not required unless instructed otherwise.
Candidates should complete all questions independently without outside assistance.
Disclaimer: This examination is an original educational simulation inspired by common
CDL testing structures and does not reproduce official state examination materials.
Q1. A commercial driver operating a loaded tractor-trailer on a long interstate route wants
to maximize fuel economy without compromising safety. Which driving practice generally
produces the best fuel efficiency?
A. Maintaining high RPMs during all highway driving
B. Using steady throttle control and minimizing unnecessary speed changes
C. Accelerating aggressively to highway speed as quickly as possible
D. Frequently shifting between cruise control and manual acceleration
Correct Answer: 🔴 B. Using steady throttle control and minimizing unnecessary speed
changes
Explanation: 🔹 Fuel-efficient commercial driving depends heavily on maintaining consistent
, vehicle momentum and minimizing unnecessary acceleration or braking events. Smooth
throttle control reduces fuel consumption because the engine operates under stable load
conditions. Option A is incorrect because high RPM operation burns more fuel unnecessarily.
Option C wastes fuel through rapid acceleration and increased engine demand. Option D
creates inconsistent engine loading and reduces efficiency. Consistent speed management is
one of the most effective fuel-saving techniques for CDL operators.
Q2. During a pre-trip inspection, a driver notices that several tires are underinflated by 15
PSI. What is the most likely effect on fuel consumption?
A. Fuel economy will improve at highway speeds
B. Fuel consumption will remain unchanged
C. Rolling resistance will increase, reducing fuel economy
D. The vehicle will accelerate more efficiently
Correct Answer: 🔴 C. Rolling resistance will increase, reducing fuel economy
Explanation: 🔹 Underinflated tires create additional rolling resistance, forcing the engine to
work harder to move the vehicle. This directly increases fuel consumption and accelerates tire
wear. Option A is incorrect because low tire pressure never improves highway fuel economy.
Option B ignores the major relationship between tire pressure and efficiency. Option D is
incorrect because poor tire inflation negatively affects acceleration efficiency and handling
stability. Proper tire inflation is essential for both fuel economy and operational safety.
ACTUAL EXAM QUESTIONS AND COMPLETE SOLUTIONS | VERIFIED ANSWERS
Examiner/Administrator: Texas Department of Public Safety
TEXAS COMMERCIAL DRIVER LICENSE
FUEL EFFICIENCY DRIVING ASSESSMENT
Professional Driver Knowledge Simulation
Candidate Name: _______________________________________
Candidate ID Number: __________________________________
Test Date: ____________________________________________
Testing Location: _____________________________________
Vehicle Classification: _________________________________
Instructor/Examiner Signature: ___________________________
CONFIDENTIAL EXAMINATION MATERIAL
DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED
,This assessment is designed to evaluate the applicant’s knowledge of fuel-efficient
commercial driving techniques, environmentally responsible vehicle operation, preventive
maintenance awareness, route management, and operational decision-making associated
with modern commercial transportation. The examination reflects competency expectations
commonly associated with Texas commercial driving standards for professional operators of
heavy vehicles and combination units. Candidates are expected to demonstrate sound
judgment regarding fuel conservation, safe acceleration practices, idle reduction, speed
management, trip planning, tire efficiency, and engine performance monitoring while
maintaining compliance with safety regulations and operational efficiency standards.
Core Competency Areas:
Fuel-Efficient Vehicle Operation
Trip Planning and Route Optimization
Speed and RPM Management
Engine and Transmission Efficiency
Preventive Maintenance Awareness
Idle Reduction Procedures
Aerodynamics and Load Management
Safe and Economical Braking Practices
Environmental Compliance
Driver Performance Monitoring
,Candidate Instructions: This examination contains approximately 50 multiple-choice
questions modeled after professional CDL knowledge assessments. The time allocation for
the complete examination is 90 minutes. Read each scenario carefully before selecting the
most appropriate answer. Only one answer is considered the best response for each question.
Use professional judgment based on safe and fuel-efficient commercial driving practices.
Mark all answers clearly. Calculators are not required unless instructed otherwise.
Candidates should complete all questions independently without outside assistance.
Disclaimer: This examination is an original educational simulation inspired by common
CDL testing structures and does not reproduce official state examination materials.
Q1. A commercial driver operating a loaded tractor-trailer on a long interstate route wants
to maximize fuel economy without compromising safety. Which driving practice generally
produces the best fuel efficiency?
A. Maintaining high RPMs during all highway driving
B. Using steady throttle control and minimizing unnecessary speed changes
C. Accelerating aggressively to highway speed as quickly as possible
D. Frequently shifting between cruise control and manual acceleration
Correct Answer: 🔴 B. Using steady throttle control and minimizing unnecessary speed
changes
Explanation: 🔹 Fuel-efficient commercial driving depends heavily on maintaining consistent
, vehicle momentum and minimizing unnecessary acceleration or braking events. Smooth
throttle control reduces fuel consumption because the engine operates under stable load
conditions. Option A is incorrect because high RPM operation burns more fuel unnecessarily.
Option C wastes fuel through rapid acceleration and increased engine demand. Option D
creates inconsistent engine loading and reduces efficiency. Consistent speed management is
one of the most effective fuel-saving techniques for CDL operators.
Q2. During a pre-trip inspection, a driver notices that several tires are underinflated by 15
PSI. What is the most likely effect on fuel consumption?
A. Fuel economy will improve at highway speeds
B. Fuel consumption will remain unchanged
C. Rolling resistance will increase, reducing fuel economy
D. The vehicle will accelerate more efficiently
Correct Answer: 🔴 C. Rolling resistance will increase, reducing fuel economy
Explanation: 🔹 Underinflated tires create additional rolling resistance, forcing the engine to
work harder to move the vehicle. This directly increases fuel consumption and accelerates tire
wear. Option A is incorrect because low tire pressure never improves highway fuel economy.
Option B ignores the major relationship between tire pressure and efficiency. Option D is
incorrect because poor tire inflation negatively affects acceleration efficiency and handling
stability. Proper tire inflation is essential for both fuel economy and operational safety.
