Lesson 3 - Piston Engine Designs & Components

Question 1

Spark plugs are connected to their respective magnetic by

Answer 1

HT (High Tension) Leads

Question 2

The piston is tapered slightly towards the crown to allow for

Answer 2

Thermal expansion

Question 3

Compression rings are fitted around the top of the piston to

Answer 3

Prevent gases escaping

Question 4

Oil control rings are used to ensure that

Answer 4

Oil is spread thinly over the inner surface of the cylinder.

Question 5

The piston is connected to the crankshaft by a

Answer 5

Connecting rod

Question 6

A Gudgeon Pin connects

Answer 6

the rod to the piston at the small end

Question 7

The distance between the centre of the crankshaft journal and the centre of the crank pin is known as the

Answer 7

Crank Throw

Question 8

The camshaft always rotates at

Answer 8

Half the speed of the engine crankshaft

Question 9

The inlet and exhaust valves close under spring pressure and are opened by the

Answer 9

Camshaft

Question 10

To assist cooling the exhaust valve is often filled with

Answer 10

Sodium

Question 11

The ‘crank assembly’ comprises of

Answer 11

• Connecting Rods
• Pistons
• Crankshaft

Question 12

The propeller is attached to and driven by the….

Answer 12

Crankshaft

Question 13

The particular part of the camshaft which lift the push rods are known as…

Answer 13

Cams

Question 14

The primary disadvantage of water cooling is…

Answer 14

The weight of the coolant

Question 15

The multiple components which seal the piston skirt are known as…

Answer 15

Piston Rings