Questions set 59

Parts of an IC Engine Cylinder and Liner

1.      A square type engine
a) Has geometrically square shape
b) Has two vertical and two horizontal cylinders
c) Has cylinder bore equal to stroke length
d) None of the mentioned
Answer: c
Explanation: A square type engine has cylinder bore length equal to cylinder stroke length.

2.      Aluminium cylinder blocks require
a) Cast iron Liners
b) Brass Liners
c) Aluminium Liners
d) No Liners
Answer: a
Explanation: Cast iron is the best suited Liner material for aluminium cylinders.

3.      The function of oil scrapper rings is to
a) Retain compression
b) Lubricate cylinder walls
c) Maintain vacuum
d) Reduce piston wear
Answer: b
Explanation: Oil scrapper rings lubricate cylinder walls.

4.      When considerable material must be removed to clean up a cylinder bore, the cylinder should be
a) Bored
b) Honed
c) Ground
d) Reamed
Answer: a
Explanation: Boring operation can easily remove the required material.

5.      The stroke of an engine is the
a) Volume of the cylinder
b) Length of the connecting rod
c) Internal diameter of the cylinder
d) Distance between TDC and BDC
Answer: d
Explanation: Distance between TDC and BDc is termed as the stroke of an engine.

6.      A four cylinder engine is of capacity 2.4 litres. Then swept volume of one cylinder is
a) 400 cubic centimeters
b) 600 cubic centimeters
c) 2400 cubic centimeters
d) 1200 cubic centimeters
Answer: b
Explanation: Volume of one cylinder will be 2.4/4 = 0.6 litres or 600 cubic centimeters.

7.      The difference between dry liners and wet liners is
a) Cylinder liner touches the coolant jacket in wet liners
b) Wet liners are thicker than dry liners
c) Packing rings are present in wet liners
d) All of the mentioned
Answer: d
Explanation: All the given differences exist between wet and dry liners.

8.      The thickness of dry liners ranges from
a) 3 mm to 9mm
b) 1.5 mm to 3 mm
c) 1 mm to 2 mm
d) 0.5 mm to 2.5 mm
Answer: b

          Explanation: The thickness of dry liners is of about 1.5 mm to 3 mm.

9.      The thickness of wet liners ranges from
a) 1.5 mm to 6 mm
b) 1 mm to 2 mm
c) 6 mm to 10 mm
d) 0.5 mm to 2.5 mm
Answer: a
Explanation: The thickness of wet liners is of about 1.5 mm to 6 mm.

10.  Cylinder liner materials are made of alloy iron containing
a) Manganese
b) Nickel
c) Chromium
d) All of the mentioned
Answer: d
Explanation: Liner is made of alloy iron containing silicon, manganese, nickel and chromium.