Diesel Mechanics/Heavy Truck
Maintenance Exam Prep 2026/2027
| DCAS Exam No. 2105 | 150+
Practice Questions with Correct
Answers & Detailed Rationales|
highly graded A+
False - CORRECT ANSWERS-Gasoline engines always deliver more power than the
same size diesel engines.
True - CORRECT ANSWERS-Once you've learned the basics of diesel engine
technology, you'll need to receive specialized training on various occasions to keep up
with the changing technology.
False - CORRECT ANSWERS-One major difference between diesel- and gasoline-
powered engines is that diesel engines don't contain crankshafts.
Diesel - CORRECT ANSWERS-Most freight is transported by equipment that's _______
engine powered.
Automotive Service Excellence - CORRECT ANSWERS-ASE stands for _______
_______ _______ and is a professional certification exam for diesel mechanics.
Electronically - CORRECT ANSWERS-The main difference between modern and older
diesel engines is that the modern engine will be _______ controlled.
70 - CORRECT ANSWERS-In recent times, _______% of freight moved in the United
States was transported by truck.
True - CORRECT ANSWERS-Some of the most modern steering systems adapt to
special situations for ease of steering.
Maintenance Exam Prep 2026/2027
| DCAS Exam No. 2105 | 150+
Practice Questions with Correct
Answers & Detailed Rationales|
highly graded A+
False - CORRECT ANSWERS-Gasoline engines always deliver more power than the
same size diesel engines.
True - CORRECT ANSWERS-Once you've learned the basics of diesel engine
technology, you'll need to receive specialized training on various occasions to keep up
with the changing technology.
False - CORRECT ANSWERS-One major difference between diesel- and gasoline-
powered engines is that diesel engines don't contain crankshafts.
Diesel - CORRECT ANSWERS-Most freight is transported by equipment that's _______
engine powered.
Automotive Service Excellence - CORRECT ANSWERS-ASE stands for _______
_______ _______ and is a professional certification exam for diesel mechanics.
Electronically - CORRECT ANSWERS-The main difference between modern and older
diesel engines is that the modern engine will be _______ controlled.
70 - CORRECT ANSWERS-In recent times, _______% of freight moved in the United
States was transported by truck.
True - CORRECT ANSWERS-Some of the most modern steering systems adapt to
special situations for ease of steering.