Engine Repair Questions And Answers.
Which one of the following is NOT a stroke of the four-stroke cycle?
A) intake
B) compression
C) ignition
D) exhaust - answer;-C) ignition
What is compression ratio?
A) the diameter of the cylinder
B) cylinder arrangement
C) the ratio of the air to fuel mixture
D) none of these answers is correct - answer;-D) none of these answers is correct
To complete a four-stroke cycle in one cylinder, the crankshaft must rotate _____
degrees.
A) 180
B) 360
C) 540
D) 720 - answer;-D) 720
On a 4-cylinder engine that has a firing order of 1342, if number 1 cylinder is on the
exhaust stroke, what stroke is number 3 cylinder on?
A) intake
B) compression
C) power
D) exhaust - answer;-C) power
The stroke of an engine is _____ that of a crankshaft throw.
A) half
B) twice
C) four times
D) equal to - answer;-B) twice
The volume of the combustion chamber when the piston is at BDC divided by the
volume of the chamber when the piston is at TDC is called _____.
A) displacement
B) compression ratio
, Engine Repair Questions And Answers.
C) volumetric efficiency
D) mechanical efficiency - answer;-B) compression ratio
Which of the following engine problems may be indicated by good results from a
compression test and a cylinder leakage test but poor results from a cylinder power
balance test?
A) incorrect valve timing
B) collapsed lifter
C) burnt intake valve
D) worn piston rings - answer;-B) collapsed lifter
The component connected to the crankshaft that serves to store some of the engine's
power is the _____.
A) flywheel
B) connecting rod
C) piston
D) main bearing - answer;-A) flywheel
Which V-type engine valve train design may use four camshafts?
A) OHC
B) DOHC
C) OHV
D) DOHV - answer;-B) DOHC
A four-stroke cycle engine requires at least _____ valves at the top of each cylinder.
A) one
B) two
C) three
D) four - answer;-B) two
In what type of engine is the intake valve held open longer than normal during the
compression stroke?
A) Wankel
B) Atkinson cycle
C) two-stroke
D) diesel - answer;-B) Atkinson cycle
, Engine Repair Questions And Answers.
Both valves are closed on the _____ strokes.
A) power and exhaust
B) intake and exhaust
C) intake and compression
D) compression and power - answer;-D) compression and power
A wet compression test is performed on an engine after a dry compression test revealed
low compression on one cylinder. If the compression on the low cylinder rises, it
indicates _____.
A) leaking valves
B) worn rings
C) worn camshaft lobe
D) all answers are correct - answer;-B) worn rings
How many degrees of crankshaft rotation does it take to complete one complete engine
cycle in a 4-stroke engine?
A) 90
B) 180
C) 360
D) 720 - answer;-D) 720
The reciprocating movement of the piston is converted into rotary motion by the _____.
A) crankshaft and connecting rod
B) intermediate shaft
C) flywheel
D) camshaft - answer;-A) crankshaft and connecting rod
What component of the engine determines the stroke?
A) cylinder block
B) pistons
C) connecting rods
D) crankshaft - answer;-D) crankshaft
What type of ICE engine listed below is commonly found in a hybrid vehicle.
A) two-stroke
B) rotary
, Engine Repair Questions And Answers.
C) diesel
D) Atkinson - answer;-D) Atkinson
Technician A says engine displacement is commonly measured in cubic millimeters.
Technician B says it is commonly measured in cubic inches. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-B) B only
Diesel engines are being discussed. Technician A says diesel engines have a
distributor-type injection pump. Technician B says diesel engines have a common fuel
rail and the injectors are controlled by the computer. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-C) both A and B
Front engine, longitudinal layout is being discussed. Technician A says this layout is
used in rear-wheel drive vehicles. Technician B says this layout is used in some front-
wheel drive vehicles. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-C) both A and B
Technician A says the engine displacement can be found on the engine ID tag.
Technician B says the date the engine was assembled can be found in the casting
numbers on the cylinder block. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-A) A only
Two technicians are discussing compression testing on a hybrid vehicle equipped with
an Atkinson cycle engine. Technician A says the compression reading of an Atkinson
cycle engine is normally higher than a conventional engine. Technician B says a scan
tool may be needed to perform the compression test. Who is correct?
Which one of the following is NOT a stroke of the four-stroke cycle?
A) intake
B) compression
C) ignition
D) exhaust - answer;-C) ignition
What is compression ratio?
A) the diameter of the cylinder
B) cylinder arrangement
C) the ratio of the air to fuel mixture
D) none of these answers is correct - answer;-D) none of these answers is correct
To complete a four-stroke cycle in one cylinder, the crankshaft must rotate _____
degrees.
A) 180
B) 360
C) 540
D) 720 - answer;-D) 720
On a 4-cylinder engine that has a firing order of 1342, if number 1 cylinder is on the
exhaust stroke, what stroke is number 3 cylinder on?
A) intake
B) compression
C) power
D) exhaust - answer;-C) power
The stroke of an engine is _____ that of a crankshaft throw.
A) half
B) twice
C) four times
D) equal to - answer;-B) twice
The volume of the combustion chamber when the piston is at BDC divided by the
volume of the chamber when the piston is at TDC is called _____.
A) displacement
B) compression ratio
, Engine Repair Questions And Answers.
C) volumetric efficiency
D) mechanical efficiency - answer;-B) compression ratio
Which of the following engine problems may be indicated by good results from a
compression test and a cylinder leakage test but poor results from a cylinder power
balance test?
A) incorrect valve timing
B) collapsed lifter
C) burnt intake valve
D) worn piston rings - answer;-B) collapsed lifter
The component connected to the crankshaft that serves to store some of the engine's
power is the _____.
A) flywheel
B) connecting rod
C) piston
D) main bearing - answer;-A) flywheel
Which V-type engine valve train design may use four camshafts?
A) OHC
B) DOHC
C) OHV
D) DOHV - answer;-B) DOHC
A four-stroke cycle engine requires at least _____ valves at the top of each cylinder.
A) one
B) two
C) three
D) four - answer;-B) two
In what type of engine is the intake valve held open longer than normal during the
compression stroke?
A) Wankel
B) Atkinson cycle
C) two-stroke
D) diesel - answer;-B) Atkinson cycle
, Engine Repair Questions And Answers.
Both valves are closed on the _____ strokes.
A) power and exhaust
B) intake and exhaust
C) intake and compression
D) compression and power - answer;-D) compression and power
A wet compression test is performed on an engine after a dry compression test revealed
low compression on one cylinder. If the compression on the low cylinder rises, it
indicates _____.
A) leaking valves
B) worn rings
C) worn camshaft lobe
D) all answers are correct - answer;-B) worn rings
How many degrees of crankshaft rotation does it take to complete one complete engine
cycle in a 4-stroke engine?
A) 90
B) 180
C) 360
D) 720 - answer;-D) 720
The reciprocating movement of the piston is converted into rotary motion by the _____.
A) crankshaft and connecting rod
B) intermediate shaft
C) flywheel
D) camshaft - answer;-A) crankshaft and connecting rod
What component of the engine determines the stroke?
A) cylinder block
B) pistons
C) connecting rods
D) crankshaft - answer;-D) crankshaft
What type of ICE engine listed below is commonly found in a hybrid vehicle.
A) two-stroke
B) rotary
, Engine Repair Questions And Answers.
C) diesel
D) Atkinson - answer;-D) Atkinson
Technician A says engine displacement is commonly measured in cubic millimeters.
Technician B says it is commonly measured in cubic inches. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-B) B only
Diesel engines are being discussed. Technician A says diesel engines have a
distributor-type injection pump. Technician B says diesel engines have a common fuel
rail and the injectors are controlled by the computer. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-C) both A and B
Front engine, longitudinal layout is being discussed. Technician A says this layout is
used in rear-wheel drive vehicles. Technician B says this layout is used in some front-
wheel drive vehicles. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-C) both A and B
Technician A says the engine displacement can be found on the engine ID tag.
Technician B says the date the engine was assembled can be found in the casting
numbers on the cylinder block. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B - answer;-A) A only
Two technicians are discussing compression testing on a hybrid vehicle equipped with
an Atkinson cycle engine. Technician A says the compression reading of an Atkinson
cycle engine is normally higher than a conventional engine. Technician B says a scan
tool may be needed to perform the compression test. Who is correct?
