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WorksheetsEngine Fundamentals Quiz Pgs 5-18
Total questions: 20
Worksheet time: 10mins
Which of the following is NOT one of the three main requirements that all engines must provide?
Air
Fuel
Water
Ignition
What is the main function of the engine block in an internal combustion engine?
To ignite the air/fuel mixture
To hold the lower parts of an engine together and in place
To provide lubrication to the engine
To control the exhaust gases
Which part of the engine is responsible for moving up and down within the cylinder to provide power?
Crankshaft
Piston
Camshaft
Valve Spring
Why are steel sleeves sometimes inserted into aluminum engine blocks?
To reduce the weight of the engine
To improve the appearance of the engine
Because aluminum does not have the durability of iron
To increase the engine's fuel efficiency
A student is examining a small engine and notices it only has one cylinder and piston. What type of engine is the student most likely looking at?
A large automotive engine
A lawn mower engine
A jet engine
A diesel locomotive engine
Which term describes the top of the piston’s travel in a cylinder?
Bottom Dead Center (BDC)
Top Dead Center (TDC)
Maximum Compression Point (MCP)
Cylinder Apex (CA)
What is the primary purpose of piston rings?
To connect the piston to the crankshaft
To prevent combustion pressure from entering the crankcase and to seal the piston
To cool the piston
To increase engine displacement
Which of the following best describes the difference between dry sleeve and wet sleeve engines?
Dry sleeve engines have sleeves in direct contact with coolant, wet sleeve engines do not.
Wet sleeve engines have sleeves in direct contact with coolant, dry sleeve engines do not.
Both have sleeves in direct contact with coolant.
Neither have sleeves in direct contact with coolant.
Why might wet sleeve engines require additional efforts to prevent coolant leakage?
Because the sleeve is not in contact with coolant
Because the sleeve is in direct contact with coolant
Because the piston is made of aluminum
Because the crankshaft is not lubricated
Pistons can come in various designs. Which of the following is NOT mentioned as a piston design in the text?
Flat top
Dished
Hemispherical
Conical
What is the primary function of a crankshaft in an engine?
To convert the up-and-down motion of pistons into a rotating motion
To cool the engine by circulating coolant
To ignite the air-fuel mixture
To filter oil before it reaches the bearings
Which of the following is NOT a purpose of the flywheel mounted at the rear of the crankshaft?
Engaging the starter to crank the engine
Connecting the engine to the transmission for power transfer
Cooling the engine block
Smoothing out power pulses from the engine
Why might an engine have two cylinder heads instead of one?
Because the engine has two 'banks' of cylinders
To increase the oil pressure
To reduce the engine weight
To improve the ignition timing
A mechanic notices excessive vibration in an engine. Based on your understanding of crankshaft design, what could be a possible cause?
Missing or improperly balanced counterweights on the crankshaft
Overfilled oil reservoir
Faulty spark plugs
Worn-out tires
What are the small pockets above the pistons called?
Combustion chambers
Valve seats
Camshafts
Rocker arms
What is the purpose of valve seats in the combustion chamber?
To provide a surface for the valves to seal against
To guide the spark plugs
To house the camshaft
To mix air and fuel
What is the main function of the camshaft in an engine?
To open and close the valves at the correct times
To ignite the air-fuel mixture
To cool the engine
To mix air and fuel
Why must the engine top end and bottom end be timed together?
So the valves will open and close at the proper times for the pistons
To ensure the oil circulates properly
To keep the engine cool
To maintain fuel pressure
What is used to link sprockets in an engine as described in the text?
A belt or a chain
A rod or a spring
A wire or a cable
A magnet or a pulley
Explain why it is important to align the timing marks on both sprockets when installing them in an engine.
To ensure the engine is properly timed and operates correctly
To make the engine look neat
To reduce the weight of the engine
To increase the speed of the belt
