25 Questions
What is the primary principle of operation for a diesel engine?
Compression ignition
What is the unit of measurement for force in the Imperial system?
Pounds
What is the formula for work?
Work = force multiplied by distance
What type of ignition is used with fuels such as gasoline and propane?
Spark ignition
What is the definition of force?
The push or pull that attempts to move an object
What is the unit of measurement for work in the Imperial system?
Foot-pounds
What is the unit of measurement for torque in the metric system?
newton metres
What is the formula to calculate the area of a cylinder?
Area = bore2 x 0.7854
What is the term used to describe the distance that a piston moves from top dead centre to bottom dead centre?
Stroke
What is the unit of measurement for engine displacement in the imperial system?
cubic inches
What is the formula to calculate engine displacement?
Engine displacement = area of a cylinder x stroke x number of cylinders
What is the term used to describe the diameter of a cylinder?
Bore
What is the unit of measurement for compression ratio?
Ratio of volumes
What is the formula to calculate compression ratio?
CR = CV / V
What is the relationship between engine displacement and power output?
Engine displacement is directly proportional to power output
What is the device used to measure engine torque?
Dynamometer
What is the primary reason a diesel engine requires a higher compression ratio than a gasoline engine?
To heat the air in the cylinder to ignite the fuel
What is the unit of measurement for heat value in the metric system?
Kilojoule (kJ)
What is the percentage of heat energy lost to overcome friction in an internal combustion engine?
7%
What is the purpose of a turbocharger or blower in an engine?
To force the intake air into the cylinder under pressure
What is the difference between indicated horsepower and brake horsepower?
Indicated horsepower is the theoretical horsepower, while brake horsepower is the rated horsepower
What is the formula to calculate brake horsepower?
bhp = ihp - fhp
What is the effect of engine speed on volumetric efficiency?
Volumetric efficiency decreases with engine speed
What is the percentage of an engine's theoretical power that is typically lost to overcome internal friction?
64%
What is the definition of one horsepower?
The ability to perform 33 000 lb-ft of work in 1 minute
Test your knowledge of the major components of an internal combustion engine, including technical terms and definitions. Learn about compression, ignition, and more. This quiz is perfect for automotive enthusiasts and students alike.
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