Automotive Systems, Quiz Yourself 4

11 Questions | By Sandybridge | Last updated: Mar 21, 2022 | Total Attempts: 1027

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Four-stroke Cycle Engine.

Questions and Answers

1.

For every two strokes made by the piston, the crankshaft ---
- A.
  
  Makes one complete revolution
- B.
  
  Makes a half-turn
- C.
  
  Remains stationery
2.

The position of the piston at the instant its motion changes from down to up is known as ---
- A.
  
  Exact half-way point
- B.
  
  Top dead center
- C.
  
  Bottom dead center
3.

Th position of the piston at the instant its motion changes from up to down is known as ---
- A.
  
  Bottom dead center
- B.
  
  Top dead center
- C.
  
  Exact half-way point
4.

How many parts comprise the action of a four-stroke cycle engine?
- A.
  
  Four
- B.
  
  Three
- C.
  
  Two
5.

During the intake stroke, the intake valve is ---
- A.
  
  Partially open
- B.
  
  Closed
- C.
  
  Open
6.

When the piston moves downward inside the cylinder, it produces ---
- A.
  
  Large amounts of heat
- B.
  
  A partial vacuum
- C.
  
  Noise
7.

At what point during the compression stroke does the intake valve close?
- A.
  
  When the crankshaft rotates
- B.
  
  When the piston reaches TDC
- C.
  
  When the piston reaches BDC
8.

During the compression stroke in gasoline engines, the air-fuel mixture is compressed to about one-eighth of its originial volume. This is called the --
- A.
  
  Compression ratio
- B.
  
  Compression equation
- C.
  
  Compression percentage
9.

Ignition takes place as the piston reaches ---
- A.
  
  DOA
- B.
  
  BDC
- C.
  
  TDC
10.

The burning fuel inside a cylinder causes pressure to rise to ---
- A.
  
  Between 600 - 700 pounds per square inch
- B.
  
  Between 600 - 700 tons per square inch
- C.
  
  Bweteen 600 - 700 pounds per centimeter
11.

When does the exhaust valve open?
- A.
  
  When the exhaust fumes reach a certain point
- B.
  
  After the piston stops moving
- C.
  
  Just as the power stroke is finished