Questions set 61

Various Parts of Engine – 2

1.      What is the material of the connecting rod
a) Mild steel
b) Forged steel
c) Tool steel
d) Cast iron
Answer: b
Explanation: Connecting rod is made of forged steel.

2.      Which of the following item is made of aluminium alloy
a) Piston ring
b) Piston
c) Connecting rod
d) Crankshaft
Answer: b
Explanation: Aluminium alloy is used in making piston.

3.      Piston pin is also known as
a) Gudgeon pin
b) Crank pin
c) Screw pin
d) None of the mentioned
Answer: a
Explanation: Piston pin is also called gudgeon pin.

4.      Compression rings are fitted at the
a) Middle of skirt
b) Bottom of skirt
c) Top of skirt
d) None of the mentioned
Answer: c
Explanation: Compression rings are located at the top of skirt.

5.      Piston rings are not completely closed because
a) Closed rings are hard to manufacture
b) Gap allows the ring to expand and fit over
c) They are designed to let pass some lubricant to the combustion chamber
d) None of the mentioned
Answer: b
Explanation: Piston rings expand due to heat of combustion and fit over.

6.      The entrance of the piston pin hole is sealed by
a) Steel plating
b) Snap ring
c) Rubber ring
d) None of the mentioned
Answer: b
Explanation: Snap rings are used to seal the entrance.

7.      Compression rings have which type of cross section
a) Rectangular
b) L shaped
c) Keystone
d) All of the mentioned
Answer: d
Explanation: All the given are types of Compression ring cross sections.

8.      Passenger car engines contain
a) 2 compression ring and 1 oil control ring
b) 2 compression ring and 2 oil control ring
c) 1 compression ring and 1 oil control ring
d) 2 compression ring and no oil control ring
Answer: a
Explanation: These type of engines contain 2 compression ring and 1 oil control ring.

9.      The function of a piston is
a) It forms a movable wall of combustion chamber
b) It transmits turning force to the crankshaft via connecting rod
c) It functions like crosshead and transmits side thrusts
d) All of the mentioned
Answer: d
Explanation: A piston performs all the above mentioned functions.

10.  If the diameter of a piston is ‘D’ then the length of skirt is usually of the range of
a) 0.75D to 0.8D
b) 0.5D to D
c) 1.5D to 2D
d) 0.2D to 0.6D
Answer: a
Explanation: The length of the skirt is usually 0.75 to 0.8 times the diameter of the piston.

11.  The plate which acts as a packing between cylinder block and cylinder head is called
a) Chaplet
b) Liner
c) Gasket
d) Flange
Answer: c
Explanation: Gasket forms the packing between cylinder block and cylinder head.

12.  Which one of the following is a type of Gasket
a) Copper asbestos
b) Steel asbestos
c) Single sheet rigid
d) All of the mentioned
Answer: d
Explanation: All the three are various types of gaskets.