Motorcycle+ATV Engine Configurations

Question 1

Motorcycles use __________ engines.

Answer 1

reciprocating

Question 2

A reciprocating engine has…

Answer 2

pistons that move alternatively up and down inside cylinders

Question 3

A cylinder is a…

Answer 3

circular tube thats closed at one end

Question 4

A piston is a…

Answer 4

circular plug that moves up and down inside the cylinder

Question 5

The closed end of the cylinder is sealed by a…

Answer 5

cylinder head

Question 6

When a piston is at its lowest position in the cylinder its at…

Answer 6

bottom-dead center(BDC)

Question 7

When the pistons at its highest position in the cylinder its at…

Answer 7

top-dead center(TDC)

Question 8

When the piston is at TDC…

Answer 8

a small amount of space remains in the cylinder head

Question 9

The small space above the top of the piston + below the cylinder head is called the…

Answer 9

combustion chamber

Question 10

In the combustion chamber…

Answer 10

a mixture of fuel+air is burned to produce power

Question 11

When the air-and-fuel mixture burns in the combustion chamber it…

Answer 11

produces a small contained explosion

Question 12

Each time the piston moves either up or down its called a…

Answer 12

piston stroke

Question 13

The bottom end of the piston is attached to a…

Answer 13

connecting rod+crankshaft

Question 14

The rod and crankshaft convert the up and down motion of the piston into a…

Answer 14

circular (rotary) motion

Question 15

The operation of four-stroke engines are divided into four stages which are…

Answer 15

(1) intake, (2) compression, (3) power, (4) exhaust

Question 16

(1)INTAKE…

Answer 16

the piston moves downward and draws an air-and-fuel mixture into the cylinder

Question 17

(2)COMPRESSION…

Answer 17

the piston rises and compresses the air-and-fuel mixture into the combustion chamber

Question 18

(3)POWER…

Answer 18

air-and-fuel mixture is ignited. explosion pushes the piston back down in the cylinder. downward motion of piston is transfered to the rod and crankshaft.

Question 19

(4)EXHAUST…

Answer 19

the piston rises and pushes the exhaust gases out of the cylinder

Question 20

In a four-stroke engine the four stages require…

Answer 20

four piston strokes

Question 21

In a two-stroke engine the four stages require…

Answer 21

two piston strokes

Question 22

The two-stroke engine has inlet snd outlet holes called…

Answer 22

ports(located at diff heights in the sides of the cylinder)

Question 23

As the piston moves up and down in the cylinder, the ports are either…

Answer 23

covered(closed) or uncovered(opened) at different times by the piston

Question 24

The two-stroke engine has a power stroke every…

Answer 24

full turn (360 degrees rotation) of the crankshaft, which is every two piston strokes

Question 25

The four-stroke engine has a power stroke for every...

Answer 25

two turns (720 degrees rotation) of the crankshaft, which is every four piston strokes

Question 26

Motorcycles and ATV engines are normally classified in one of the following ways...

Answer 26

by the size of the engine by the amount of power it produces

Question 27

One horsepower is equal to...

Answer 27

550 ft-lb of work per second

Question 28

Work is a force...

Answer 28

thats applied over a specific distance

Question 29

Torque is a measurement of...

Answer 29

twisting or rotational motion

Question 30

Engine torque is usually measured in...

Answer 30

foot-pounds (ft-lbs)

Question 31

The rpm is a measure of how many complete...

Answer 31

turns (360) the crankshaft makes in one minute

Question 32

Power is related to the...

Answer 32

rate (speed) that work can be done

Question 33

engine displacement is the...

Answer 33

volume of space that the piston moves as it moves from BDC to TDC

Question 34

The stroke of the engine is the distance that...

Answer 34

the piston travels up or down in a cylinder

Question 35

The diameter of the cylinder is called the...

Answer 35

bore

Question 36

Displacement on motorcycle engines are usually measured in...

Answer 36

cubic centimeters (cc) may also be measured in cubic inches (ci)

Question 37

Motorcycle engine displacements range from...

Answer 37

50cc to 1500cc

Question 38

ATVs have a general displacement range of...

Answer 38

50cc to 500cc

Question 39

In most cases, the larger the displacement...

Answer 39

the more power the engine will develop

Question 40

Of all the engine designs used on motorcycles and ATVs, the ___________ engine is the _____ _______

Answer 40

two-stroke least complex

Question 41

The ___________ two-stroke engine is the least complex of all two-stroke engines.

Answer 41

single-cylinder

Question 42

The ______ in the two-stroke engine is used to engage and disengage the transmission and the rear wheel from the crankshaft power output

Answer 42

clutch

Question 43

_______ are used to seal the mating surfaces of various parts of the engine

Answer 43

gaskets

Question 44

Gasket material may be...

Answer 44

rubber, cork, or metal

Question 45

The three different starting mechanisms the two-stroke engines uses are...

Answer 45

a kick starter the electric start mechanism the recoil starter mechanism

Question 46

two stroke engines use one of two ways of maintaining ideal operating temp...

Answer 46

air-cooled and liquid cooled temperature control

Question 47

air-cooled, two-stroke, single-cylinder engines use _______ ____ on the cylinder block and the cylinder head to remove any excess heat from the engine

Answer 47

cooling fins

Question 48

liquid-cooled two-stroke engine uses a _______, typically a _____ ______ fluid, circulated through passages within the engine block and head to absorb heat, which is then transferred to a radiator for cooling via airflow before being recirculated.

Answer 48

coolant water-based

Question 49

two advantages of the liquid-cooled two-stroke engine is...

Answer 49

runs quieter keeps engine at constant temp.