Question 1

Engine displacement is the volume of space that the ___________moves.&#10;A)crankshaft&#10;B)piston&#10;C)camshaft&#10;D)connecting rod

Accepted Answer

Engine displacement refers to the total volume of air/fuel mixture an engine can draw in during one complete engine cycle; it is the volume displaced by the piston as it moves in the cylinder.

Question 2

The fuel mixture starts out in the bottom of a two-stroke engine crankcase.

Accepted Answer

In a two-stroke engine, the fuel-air mixture indeed starts in the crankcase and is then compressed and moved into the combustion chamber as part of its operation cycle.

Question 3

Torque is measured in _______________.&#10;A)ft-lbs.&#10;B)ft-lbs./sec&#10;C)ft-lbs./min&#10;D)kilo pascals

Accepted Answer

Torque is a measure of rotational force and is commonly expressed in foot-pounds (ft-lbs), which indicates how many pounds of force are applied at the end of a lever (or radius) one foot long.

Question 4

How does the fuel and air mixture get from the bottom of the crankcase to the combustion chamber in a two- stroke engine?

Accepted Answer

The answer of How does the fuel and air mixture...

Question 5

A four-stroke engine has a power stroke every 180 degrees.

Accepted Answer

In a four-stroke engine, the power stroke occurs once every two revolutions of the crankshaft, which is every 720 degrees, not 180 degrees.

Question 6

What is a counter-balancer?

Accepted Answer

The answer of What is a counter-balancer?...

Question 7

The piston is rising on the exhaust stroke of a four-stroke engine.

Accepted Answer

During the exhaust stroke of a four-stroke engine, the piston moves upwards to expel exhaust gases from the cylinder.

Question 8

Displacement can be measured in CCs or ____________.&#10;A)Newton meters&#10;B)degrees Kelvin&#10;C)millimeters squared&#10;D)cubic inches

Accepted Answer

Displacement, especially in the context of engines or volumes, is measured in cubic units, such as cubic centimeters (CCs) or cubic inches, to represent the volume displaced by the pistons within the cylinders.

Question 9

A crankshaft turns reciprocating motion into rotary motion.

Accepted Answer

A crankshaft converts the up-and-down (reciprocating) motion of the pistons into a rotational (rotary) motion that is transmitted to the wheels.

Question 10

____is the comparison of the volume in the cylinder to the combustion chamber.&#10;A)Cylinder displacement&#10;B)Compression ratio&#10;C)Engine efficiency&#10;D)Brake horsepower

Accepted Answer

The compression ratio is the comparison of the volume in the cylinder when the piston is at the bottom of its stroke (maximum volume) to the volume in the combustion chamber when the piston is at the top of its stroke (minimum volume). This ratio is a key factor in the performance and efficiency of an engine.

Question 11

A horizontally opposed engine has a lower center of gravity than an in-line engine.

Accepted Answer

The answer of A horizontally opposed engine has a lower...

Question 12

What happens in a two-stroke engine at the same time the piston is moving up on the compression stroke?

Accepted Answer

The answer of What happens in a two-stroke engine at...

Question 13

Explain how horsepower and torque are measured.

Accepted Answer

The answer of Explain how horsepower and torque are measured....

Question 14

The ____ is supported on either end by bearings.&#10;A)crankshaft&#10;B)wrist pin clip&#10;C)clutch&#10;D)combustion chamber

Accepted Answer

The answer of The ____ is supported on either end...

Question 15

What is open draft cooling?

Accepted Answer

The answer of What is open draft cooling?...

Deck 5: Introduction to Basic Engine Operation and Configurations