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Worksheets

ENGINES

Total questions: 30

Worksheet time: 35mins

Name
Class
Date
1.

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

a)

exhaust

b)

intake

c)

compression

d)

power

2.

Engine bore refers to:

a)

An engine's horsepower

b)

The diameter of a cylinder

c)

How fast the crankshaft turns

d)

Cylinder layout

3.

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

a)

BTDC

b)

TDC again

c)

BDC

d)

ABCD

4.

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

5.

______________________ is the travel distance of the piston.

a)

stroke

b)

bore

c)

diameter

d)

RPM

6.

What is the compression ratio for most gasoline engines?

a)

6:1

b)

8:1

c)

12:1

d)

16:1

7.

The measure of mechanical power is called _____________________?

a)

Torque

b)

Horsepower

c)

Bore

d)

RPM

8.

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

a)

exhaust

b)

intake

c)

compression

d)

power

9.

When the intake valve closes. The piston moves..

a)

downwards

b)

upwards

c)

sideways

d)

clockwise

10.

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

a)

mechanical, chemical

b)

chemical, mechanical

c)

kinetic, chemical

d)

chemical, kinetic

11.

This links the piston to the crankshaft.

a)

Connecting rod

b)

Camshaft

c)

Valve stem

d)

Piston rings

12.

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

a)

Water

b)

Oil

c)

Carbon dioxide

d)

Air

13.

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

a)

2, 1

b)

4, 1

c)

4, 2

d)

2, 4

14.

Which valve is open during the compression stroke?

a)

Both

b)

Neither

c)

Intake

d)

Exhaust

15.

Atmospheric Pressure also known as:

a)

Barometric Pressure

b)

Sea Level Pressure

c)

Humidity Level

d)

Doppler Effect

e)

Intake Flow

16.

Match the following

a)
1.

Oxygen Sensor

b)
2.

ABS sensor

c)
3.

Fuel Pressure Sensor

d)
4.

MAF Sensor

e)
5.

Coolant Temp Sensor

17.

Hall Effect Sensors:

a)

Have 2 Wires

b)

Have 3 Wires

c)

Are used on Accelerator Pedals

d)

Are used on Fuel Sending Units

e)

Are used on Coolant Reservoirs

18.

A Knock Sensor Detects:

a)

Engine Misfires

b)

Exhaust Leaks

c)

Tire Imbalance

d)

Distance Between you and the Next Vehicle

e)

A potential Car-Jacker

19.

A temperature sensitive variable resistor:

a)

Thermistor

b)

Hydrometer

c)

Rheostat

d)

Mercurometer

e)

Potentiometer

20.

During the intake stroke of a four-stroke engine, the intake

a)

valve is closed, the exhaust valve is open, and the piston is moving up

b)

valve is open, the exhaust valve is closed, and the piston is moving down

c)

and exhaust valves are closed, and the piston is moving up

d)

and exhaust valves are closed, and the piston is down

21.

The cylinder head performs all of the following function except

a)

houses the valves

b)

covers the crankshaft

c)

houses the spark plug(s)

d)

seals the combustion chamber

22.
All four stroke engines have two camshafts.
a)
false
b)
true
23.
V-type motors tend to be longer than inline motors
a)
true
b)
false
24.

An engine does not reach operating temperature while being driven. Which of these could be the cause?

a)

A slipping water pump belt

b)

A stuck open thermostat

c)

A stuck closed thermostat

d)

A clogged radiator passage

25.

Name the item in the picture:

a)

Gas Cap

b)

Radiator Pressure Cap

c)

Water Pump

d)

Thermostat

26.

Which engine valve configuration has the camshaft in the cylinder block.

a)

Over Head Valve (OHV)

b)

Over Head Cam (OHC)

c)

Dual Over Head Cam (DOHC)

d)

This is a trick question Mr. Gregoire

27.

True or False: An engines cooling system is designed to transfer excess heat from the engine to the atmosphere.

a)

True

b)

False

28.

What position are the valves in during the intake stroke

a)

Intake Closed, Exhaust Closed

b)

Intake Open, Exhaust Open

c)

Intake Open, Exhaust Closed

d)

I have no idea

29.

Technician A says that the engine should be cleaned before checking for oil leaks. Technician B says that a florescent dye should be added to the engine oil when checking leaks with a black light. Who is correct?

a)

Tech A

b)

Tech B

c)

Both A and B

d)

Neither A nor B

30.

What is the freeze point for coolant mixed with a 50/50 Antifreeze to water ratio ?

a)

32*F

b)

0*F

c)

-35*F

d)

-100*F