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Click on the best answer:
1. How many revolutions of the crankshaft are there in a four-stroke cycle?
A: One B: Two C: Four D: It varies with engine speed
2. How many degrees of rotation of the crankshaft are there in a cycle?
A: Four B: 360 C: 720 D: It varies with engine speed
3. How many degrees of crankshaft rotation are there between power strokes in a single cylinder engine?
A: 360 B: 720 C: 180 D: 90
4. How many degrees of crankshaft rotation are there between power strokes in a four cylinder engine?
A: 360 B: 720 C: 180 D: 90
5. How many degrees of crankshaft rotation are there between power strokes in a V-eight engine?
A: 360 B: 720 C: 180 D: 90
6. Which engine would run the smoothest?
A: V-eight B: inline six C: inline four D: single
Compression Stroke
7. Which way is the piston going on the compression stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
8. So the volume of the cylinder's getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
9. ...and the pressure is getting...?
A: Higher B: Lower C: Stays the same D: I don't know
10. How much pressure is created? (in a normal modern engine)
A: 14.7 PSI B: 500 PSI C: 6000 PSI D: 150 PSI
11. Which valve is open ?
A: Intake B: Exhaust C: Neither D: Compression
12. What happens to the temperature of a gas that's being compressed?
A: It goes down B: It stays the same C: It goes up D: It doesn't matter
13. In a gasoline engine, what happens to the air/fuel mixture if it's temperature gets higher than the flash point of the fuel?
A: It explodes, causing engine damage B: It gives more power
C: It make no difference D: It makes the spark plugs last longer.
Exhaust Stroke
14.Which way is the piston going on the exhaust stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
15.So the volume of the cylinder is getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
16.... and the pressure is getting...?
A: Higher B: Lower (vacuum) C: Stays the same D: I don't know
17. Which valve is open?
A: Intake B: Exhaust C: Neither D: Compression
Intake Stroke
18.Which way is the piston going on the intake stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
So the volume of the cylinder is getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
19....and the pressure is getting...?
A: Higher B: Lower (vacuum) C: Stays the same D: I don't know
20.Which valve is open?
A: Intake B: Exhaust C: Neither D: Compression
21.What is outside the engine forcing the air into the cylinder?
A: Gravity B: Suction C: the valves D: Atmospheric pressure
Power Stroke
23. Which way is the piston going on the power stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
24....so the volume of the cylinder is getting?
A: Larger B: Smaller C: Stays the same D: I don't know
25.Which valve is open?
A: Intake B: Exhaust C: Neither D: Power
26.What starts the air/fuel mixture burning?
A: Compression B: Power valve C: Spark Plug D: Burning gas
27.What is forcing the piston down?
A: Compression B: Power valve C: Spark plug D: Burning Gas
28.What order do the four strokes go in?
A: Exhaust - Intake - Power - Compression
B: Intake - Compression - Power - Exhaust
C: Power - Power - Intake - Compression
D: Compression - Intake - Exhaust - Power
29.If an engine had a cylinder volume (between TDC and BDC) of 80 cc, and a combustion chamber volume of 10 cc, what is its' compression ratio?
A: 8 : 1 B: 9 : 1 C: 80 : 10 D: 1 : 80
30.Another name for the diameter of the cylinder is the:
A: Bore B: Circumference C: Stroke D: Throw
31.The distance between TDC and BDC is called an engine's:
A: Bore B: Circumference C: Stroke D: Throw
32.The ____________ is exactly one half of the engines stroke.
A: Bore B: Circumference C: Stroke D: Throw
Click on the best answer:
1. How many revolutions of the crankshaft are there in a four-stroke cycle?
A: One B: Two C: Four D: It varies with engine speed
2. How many degrees of rotation of the crankshaft are there in a cycle?
A: Four B: 360 C: 720 D: It varies with engine speed
3. How many degrees of crankshaft rotation are there between power strokes in a single cylinder engine?
A: 360 B: 720 C: 180 D: 90
4. How many degrees of crankshaft rotation are there between power strokes in a four cylinder engine?
A: 360 B: 720 C: 180 D: 90
5. How many degrees of crankshaft rotation are there between power strokes in a V-eight engine?
A: 360 B: 720 C: 180 D: 90
6. Which engine would run the smoothest?
A: V-eight B: inline six C: inline four D: single
Compression Stroke
7. Which way is the piston going on the compression stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
8. So the volume of the cylinder's getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
9. ...and the pressure is getting...?
A: Higher B: Lower C: Stays the same D: I don't know
10. How much pressure is created? (in a normal modern engine)
A: 14.7 PSI B: 500 PSI C: 6000 PSI D: 150 PSI
11. Which valve is open ?
A: Intake B: Exhaust C: Neither D: Compression
12. What happens to the temperature of a gas that's being compressed?
A: It goes down B: It stays the same C: It goes up D: It doesn't matter
13. In a gasoline engine, what happens to the air/fuel mixture if it's temperature gets higher than the flash point of the fuel?
A: It explodes, causing engine damage B: It gives more power
C: It make no difference D: It makes the spark plugs last longer.
Exhaust Stroke
14.Which way is the piston going on the exhaust stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
15.So the volume of the cylinder is getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
16.... and the pressure is getting...?
A: Higher B: Lower (vacuum) C: Stays the same D: I don't know
17. Which valve is open?
A: Intake B: Exhaust C: Neither D: Compression
Intake Stroke
18.Which way is the piston going on the intake stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
So the volume of the cylinder is getting...?
A: Larger B: Smaller C: Stays the same D: I don't know
19....and the pressure is getting...?
A: Higher B: Lower (vacuum) C: Stays the same D: I don't know
20.Which valve is open?
A: Intake B: Exhaust C: Neither D: Compression
21.What is outside the engine forcing the air into the cylinder?
A: Gravity B: Suction C: the valves D: Atmospheric pressure
Power Stroke
23. Which way is the piston going on the power stroke?
A: Upward B: Downward C: Clockwise D: Counterclockwise
24....so the volume of the cylinder is getting?
A: Larger B: Smaller C: Stays the same D: I don't know
25.Which valve is open?
A: Intake B: Exhaust C: Neither D: Power
26.What starts the air/fuel mixture burning?
A: Compression B: Power valve C: Spark Plug D: Burning gas
27.What is forcing the piston down?
A: Compression B: Power valve C: Spark plug D: Burning Gas
28.What order do the four strokes go in?
A: Exhaust - Intake - Power - Compression
B: Intake - Compression - Power - Exhaust
C: Power - Power - Intake - Compression
D: Compression - Intake - Exhaust - Power
29.If an engine had a cylinder volume (between TDC and BDC) of 80 cc, and a combustion chamber volume of 10 cc, what is its' compression ratio?
A: 8 : 1 B: 9 : 1 C: 80 : 10 D: 1 : 80
30.Another name for the diameter of the cylinder is the:
A: Bore B: Circumference C: Stroke D: Throw
31.The distance between TDC and BDC is called an engine's:
A: Bore B: Circumference C: Stroke D: Throw
32.The ____________ is exactly one half of the engines stroke.
A: Bore B: Circumference C: Stroke D: Throw