CERTIFICATION EXAMINATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ The two-cycle diesel engine delivers a power stroke every
___________ of crankshaft rotation. Answer: 360°
◉ How many societies and organizations have developed standards
focused on reciprocating internal combustion engines? Answer: Two
◉ Which system is responsible for removing combustion gases from the
combustion chamber? Answer: Exhaust system
◉ A CI engine relies on __________ to generate heat for combustion.
Answer: Air
◉ Due to the high volume of air flow during scavenging in a two stroke
engine, the cooling affect of this air is reported to be responsible for
___________ of engine cooling. Answer: 30%
, ◉ The clearance volume is measured with the piston at the TDC
position, which factor listed below would be directly affected by
changing the physical clearance volume dimension? Answer:
Compression ratio
◉ The shortest duration stroke of a four-stroke diesel engine is the
_________ stroke. Answer: Power
◉ Which component is the largest structure of an engine? Answer:
Cylinder block
◉ Today's modern diesel engines have a thermal efficiency of
____________ . Answer: 45-52%
◉ A by-product of combining oxygen and hydrocarbons during
combustion is? Answer: Carbon dioxide
◉ How is torque measured in the metric system? Answer: Newton
meters
◉ The camshaft and crankshaft within a four-stroke cycle engine are
timed or synchronized to rotate together, how many times must a
Technician rotate the crankshaft to complete one full rotation of the
synchronized camshaft? Answer: 2 rotation