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engines

Total questions: 50

Worksheet time: 18mins

Name
Class
Date
1.

An engine is a device that changes _________ energy in fuel to __________ energy.

a)

mechanical, chemical

b)

chemical, mechanical

c)

kinetic, chemical

d)

chemical, kinetic

2.

The bore in which a piston operates is the ________.

a)

Block

b)

Head

c)

Cylinder

d)

Valve train

3.

The engine part that slides back in forth in a cylinder is the _____________.

a)

Valve

b)

Piston

c)

Crankshaft

d)

Camshaft

4.

This links the piston to the crankshaft.

a)

Connecting rod

b)

Camshaft

c)

Valve stem

d)

Piston rings

5.

Converts reciprocating motion into rotating motion.

a)

Camshaft

b)

Piston

c)

Crankshaft

d)

Connecting rod

6.

Which is the correct order of events in an engine?

a)

Intake, Power, Compression, Exhaust

b)

Intake, Power, Exhaust, Compression

c)

Intake, Compression, Power, Exhaust

d)

Intake, Exhaust, Power, Compression

7.

In which event is a mixture of fuel and air drawn into the cylinder?

a)

Intake

b)

Compression

c)

Power

d)

Exhaust

8.

In which event is the air/fuel mixture compressed into a space and ignited by a spark?

a)

Intake

b)

Compression

c)

Power

d)

Exhaust

9.

In which event is the piston driven down by the expansion of the burning air/fuel mixture?

a)

Intake

b)

Compression

c)

Power

d)

Exhaust

10.

In which event are the burn gases expelled from the cylinder?

a)

Intake

b)

Compression

c)

Power

d)

Exhaust

11.

In a four stroke engine, gasoline must be mixed with the correct amount of _____________.

a)

Water

b)

Oil

c)

Carbon dioxide

d)

Air

12.

The _________ creates the spark to ignite the air/fuel mixture.

a)

spark plug

b)

glow plug

c)

flint

d)

striker

13.

Diesel engines use glow plugs to _______ the compressed air, causing it to combust.

a)

heat

b)

cool

c)

release

d)

compress

14.

A _________ is the full travel of the piston, in either direction.

a)

revolution

b)

turn

c)

cycle

d)

stroke

15.

In a four stroke engine, _____ strokes are needed to complete _____ operating cycle.

a)

2, 1

b)

4, 1

c)

4, 2

d)

2, 4

16.

In a four stroke engine, a piston travels up _____ and down ______.

a)

once, once

b)

twice, twice

c)

once, twice

d)

twice, once

17.

Which valve is open during the intake stroke?

a)

Both

b)

Neither

c)

Intake

d)

Exhaust

18.

Which valve is open during the compression stroke?

a)

Both

b)

Neither

c)

Intake

d)

Exhaust

19.

Which valve is open during the exhaust stroke?

a)

Both

b)

Neither

c)

Intake

d)

Exhaust

20.

During the intake stroke, the piston travels to __________.

a)

top dead center

b)

bottom dead center

c)

the mid-point

d)

none of the above

21.

During a four stroke engine cycle, the crankshaft makes how many rotations?

a)

1

b)

2

c)

3

d)

4

22.

The _______ stores rotational energy and keeps the crankshaft spinning smoothly.

a)

crankshaft

b)

counterweights

c)

flywheel

d)

piston

23.

Gives the engine balance.

a)

Piston

b)

Crankshaft

c)

Block

d)

Counterweights

24.

Two stroke engines complete all events in ______ strokes.

a)

1

b)

2

c)

3

d)

4

25.

Which is NOT true of 2-stroke engines?

a)

Lighter

b)

More powerful

c)

Higher emissions

d)

Can operate at higher speeds

26.

What is the third stroke of an engines

a)

Exhaust

b)

Intake

c)

Compression

d)

Power

27.

What is the number one shop safety rule?

a)

Report all accidents to the instructor

b)

Always wear safety glasses

c)

No horseplaying

d)

Know where the fire extinguishers are located

28.

What is the first stroke of an engine?

a)

Compression

b)

Intake

c)

Power

d)

Exhaust

29.

What is the last stroke of an engine?

a)

Exhaust

b)

Power

c)

Compression

d)

Intake

30.

What are the two valves called?

a)

Exhaust, Intake

b)

Intake, Outtake

c)

Ignition, Exhaust

d)

Up, Down

31.

What type of fire extinguisher do we have in shop?

a)

ABC

b)

BCD

c)

A

d)

B

32.
A controlled explosion occurs on the ______stroke?
a)
Power Stroke
b)
Intake Stroke
c)
Compression Stroke
d)
Exhaust Stroke
33.
What can happen if a small engine cooling fins are dirty and full of debris?
a)
Engine cannot cool properly
b)
Oil will break down quicker
c)
Engine could overheat
d)
All of the above
34.
The camshaft gear turns _________ to every two turns of the crankshaft gear?
a)
Once
b)
Twice
c)
Three times
d)
None of the above
35.
The camshaft gear is _______as large as the crankshaft gear?
a)
Four times
b)
Twice
c)
Three times
d)
None of the above
36.
What device brings the valves back to a closed position?
a)
Governor
b)
Cylinder head
c)
Valve Springs
d)
Spark Plug
37.
The device is used to connect the piston pin to the crankshaft is called a __________  ____?
a)
Oil Dipper
b)
Tappet + Valve
c)
Connecting Rod
d)
None of the above
38.

What is the first stroke in the 4 stroke (Otto) cycle?

a)

exhaust

b)

intake

c)

compression

d)

power

39.

What is the second stroke in the 4 stroke (Otto) cycle?

a)

exhaust

b)

intake

c)

compression

d)

power

40.

What is the third stroke in the 4 stroke (Otto) cycle?

a)

exhaust

b)

intake

c)

compression

d)

power

41.

What is the fourth stroke in the 4 stroke (Otto) cycle?

a)

exhaust

b)

intake

c)

compression

d)

power

42.

Engine bore refers to:

a)

An engine's horsepower

b)

The diameter of a cylinder

c)

How fast the crankshaft turns

d)

Cylinder layout

43.

Stroke is the distance the piston travels from TDC to ____________.

a)

BTDC

b)

TDC again

c)

BDC

d)

ABCD

44.

Volumetric efficiency is the ability of an engine to:

a)

Not create emissions

b)

Create heat

c)

Pull in air

d)

Distribute fuel evenly

45.

The total volume of space displaced by the pistons traveling up and down inside all the cylinders is ________________.

a)

Horsepower

b)

Turbocharger

c)

Torque

d)

Displacement

46.

______________________ is the travel distance of the piston.

a)

stroke

b)

bore

c)

diameter

d)

RPM

47.

RPM stands for?

a)

revolutions per minute

b)

revolutions per mile

c)

rotations per mile

d)

rapid piston manufacturer

48.

A car engine's job is to

a)

convert fuel into heat

b)

convert fuel into motion

c)

convert fuel into exhaust

49.

A crankshaft's job in an engine is to:

a)

deliver fuel to the cylinders

b)

change linear motion into rotational motion

c)

keep cylinder heads in place

50.

A Timing belt or Timing chain links these two components together so that the valves are in sync with the pistons:

a)

the flywheel to the camshaft

b)

the crankshaft to the camshaft

c)

the cylinder head to the camshaft

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