Reciprocating Engine

Question 1

Piston Engines are classified into?

Answer 1

Spark Ignition (SI) and Compression Ignition (CI).

Question 2

The first four-stroke engine was built by August Otto. Thus, the four-stroke engine is often called an

Answer 2

Otto-cycle engine.

Question 3

What is a stroke in an engine?

Answer 3

It is the total movement of the piston from the bottom-dead centre to the top-dead centre of the cylinder, or vice versa.

Question 4

For a 4-stroke engine, how many strokes occur in two revolutions?

Answer 4

4. One power stroke is generated per two revolutions.

Question 5

For a 2-stroke engine, how many strokes occur in each revolutions?

Answer 5

2 strokes occur in each complete revolution. One power stroke is generated per revolution.

Question 6

The following are cylinder arrangement types?

Answer 6

• In-Line
• Radial
• Horizontally-opposed (Boxer / Flat)
• V-Type

Question 7

At which point during a 4-stroke cycle are exhaust gases released?

Answer 7

Exhaust stroke.

Question 8

____ is converted into ______ to drive the engine?

Answer 8

Chemical Potential Energy is converted into Kinetic Energy to drive the engine.

Question 9

If the compression ratio is too high, detonation of the fuel before the piston moves to the top dead centre will occur, thus?

Answer 9

causing overheating, loss of power and probable damage to the pistons and the cylinders.

Question 10

What converts the linear motion of the piston to rotary motion?

Answer 10

Crank and Connecting Rod

Question 11

Are there spark plugs in a diesel engine?

Answer 11

No