©Jason McConnel 2025 ALL RIGHTS RESERVED.
Engine Repair Exam Questions With Correct
Answers A+
Cylinder Block - Answer✔Houses the area whrre combustion happens, Maybe be made from
iron or aluminum, this is what the heads and oil pan connect to.
What can be identified by a vacuum test ? - Answer✔Improper valve or ignition timing,
Manifold leak, Weak valve spring, Leaking head gasket, Carburetor or Injector adjustment,
Burnt or leaking valves, Sticking valves, Restricted catalytic converter, uneven compression,
Restricted exhaust system
An engine makes a sharp metallic rapping noise at idle that is present wether the engine is hot or
cold, Noise disappears at acceleration or higher speeds. - Answer✔Worn piston pins
What is a compression ratio ? - Answer✔The ratio of air/fuel mixture
How long is the stroke of an engine compared to the length of crankshaft throw ? -
Answer✔Twice the size
What engine system removes burnt gasses and reduces noise produced by the engine ? -
Answer✔Exhaust
In an over square engine the bore is _____ than the stroke - Answer✔Bigger
What does the selective catalytic converter do in newer diesel vehicles ? - Answer✔Reduce
harmful emissions
What's the minimum number of valves in a 4 stroke engine ? - Answer✔2
How many degrees of crank shaft rotation are require to complete a 4 stroke cycle ? -
Answer✔720°
Causes of low oil pressure are ? - Answer✔Pump related problems, plugged oil pickup screen,
weak or broken oil pressure relief valve, low oil level, contaminated oil, or low oil viscosity
Causes of high oil pressure are ? - Answer✔Too much oil, cold oil, high oil viscosity, Restricted
oil passages, or a faulty pressure regulator
What can be caused by abnormal oil pressure ? - Answer✔Loss of performance, excessive
engine noise, and poor starting
What does a fuel cell electric vehicle rely on to produce electricity? - Answer✔Hydrogen
1|Page
, ©Jason McConnel 2025 ALL RIGHTS RESERVED.
Are both gasoline and Diesel engines internal combustion ? - Answer✔Yes
Which V-type engine valve train design may use four camshafts ? - Answer✔DOHC
Can poor fuel economy be used by a missing thermostat ? - Answer✔Yes
True or False ? Diesel engines only run on 4 stroke principle ? - Answer✔False
All OHV engine designs use one camshaft in the block ? - Answer✔No GM cane out with one
that uses two
What engine type uses principles from both gasoline and Diesel engines ? - Answer✔Stratified
What is a W engine configuration? - Answer✔Two V-type engines put together at the crankshaft
Does the lubrication system help do? - Answer✔Transfer heat from one pet to another for
cooling
Does torque always increase with engine RPM ? - Answer✔No
High engine compression ratio usually requires higher octane fuel ? - Answer✔Yes
What procedure is recommended before mounting the engine onto an engine stand ? -
Answer✔Remove the flex plate or fly wheel
What vehicle type has the most straight forward procedure for removing the engine ? -
Answer✔RWD
Are water based cleaning solutions necessarily biodegradable? - Answer✔No
In which order should cylinder head bolts be removed ? - Answer✔Starting on inside moving out
Why is it a good idea to organizers during removal ? - Answer✔To remember their proper
location
Which term best describes the build up of mineral deposits inside the cooling system ? -
Answer✔Scale
if it is necessary to remove the a/c compressor what should be done first ? - Answer✔Evacuate
the system
What type of parts cleaning method requires additional shot blasting or washing ? -
Answer✔Thermal
Which cleaning method loosens dirt from parts using microscopic bubbles created by high
frequency sound waves ? - Answer✔Ultrasonic
What is the minimum number of bolts required to safely mount engine to engine stand ? -
Answer✔4
Which material should not be cleaned with caustic soda ? - Answer✔Aluminum
2|Page
Engine Repair Exam Questions With Correct
Answers A+
Cylinder Block - Answer✔Houses the area whrre combustion happens, Maybe be made from
iron or aluminum, this is what the heads and oil pan connect to.
What can be identified by a vacuum test ? - Answer✔Improper valve or ignition timing,
Manifold leak, Weak valve spring, Leaking head gasket, Carburetor or Injector adjustment,
Burnt or leaking valves, Sticking valves, Restricted catalytic converter, uneven compression,
Restricted exhaust system
An engine makes a sharp metallic rapping noise at idle that is present wether the engine is hot or
cold, Noise disappears at acceleration or higher speeds. - Answer✔Worn piston pins
What is a compression ratio ? - Answer✔The ratio of air/fuel mixture
How long is the stroke of an engine compared to the length of crankshaft throw ? -
Answer✔Twice the size
What engine system removes burnt gasses and reduces noise produced by the engine ? -
Answer✔Exhaust
In an over square engine the bore is _____ than the stroke - Answer✔Bigger
What does the selective catalytic converter do in newer diesel vehicles ? - Answer✔Reduce
harmful emissions
What's the minimum number of valves in a 4 stroke engine ? - Answer✔2
How many degrees of crank shaft rotation are require to complete a 4 stroke cycle ? -
Answer✔720°
Causes of low oil pressure are ? - Answer✔Pump related problems, plugged oil pickup screen,
weak or broken oil pressure relief valve, low oil level, contaminated oil, or low oil viscosity
Causes of high oil pressure are ? - Answer✔Too much oil, cold oil, high oil viscosity, Restricted
oil passages, or a faulty pressure regulator
What can be caused by abnormal oil pressure ? - Answer✔Loss of performance, excessive
engine noise, and poor starting
What does a fuel cell electric vehicle rely on to produce electricity? - Answer✔Hydrogen
1|Page
, ©Jason McConnel 2025 ALL RIGHTS RESERVED.
Are both gasoline and Diesel engines internal combustion ? - Answer✔Yes
Which V-type engine valve train design may use four camshafts ? - Answer✔DOHC
Can poor fuel economy be used by a missing thermostat ? - Answer✔Yes
True or False ? Diesel engines only run on 4 stroke principle ? - Answer✔False
All OHV engine designs use one camshaft in the block ? - Answer✔No GM cane out with one
that uses two
What engine type uses principles from both gasoline and Diesel engines ? - Answer✔Stratified
What is a W engine configuration? - Answer✔Two V-type engines put together at the crankshaft
Does the lubrication system help do? - Answer✔Transfer heat from one pet to another for
cooling
Does torque always increase with engine RPM ? - Answer✔No
High engine compression ratio usually requires higher octane fuel ? - Answer✔Yes
What procedure is recommended before mounting the engine onto an engine stand ? -
Answer✔Remove the flex plate or fly wheel
What vehicle type has the most straight forward procedure for removing the engine ? -
Answer✔RWD
Are water based cleaning solutions necessarily biodegradable? - Answer✔No
In which order should cylinder head bolts be removed ? - Answer✔Starting on inside moving out
Why is it a good idea to organizers during removal ? - Answer✔To remember their proper
location
Which term best describes the build up of mineral deposits inside the cooling system ? -
Answer✔Scale
if it is necessary to remove the a/c compressor what should be done first ? - Answer✔Evacuate
the system
What type of parts cleaning method requires additional shot blasting or washing ? -
Answer✔Thermal
Which cleaning method loosens dirt from parts using microscopic bubbles created by high
frequency sound waves ? - Answer✔Ultrasonic
What is the minimum number of bolts required to safely mount engine to engine stand ? -
Answer✔4
Which material should not be cleaned with caustic soda ? - Answer✔Aluminum
2|Page
