This set of Farm Tractor Multiple Choice Questions & Answers (MCQs) focuses on “Engine Parts”.
1. Which shaft operates the valves promptly?
a) Camshaft
b) Main shaft
c) Secondary shaft
d) Primary shaft
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Explanation: The camshaft is comprised of cams which can operate the inlet and exhaust valves of an engine cylinder. The camshaft is connected to the valves either directly or through tappet and pushrods. They are made of forged steel or cast iron.
2. Which part is known as the main body of an engine?
a) Cylinder cover
b) Engine block
c) Cylinder envelope
d) Cylinder head
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Explanation: The block is the prime part and main body of an engine which houses the most of the engine parts. It is made up of cast iron or aluminium. It is often synonymously used with cylinder block, which holds cylinders and valves.
3. The cylinder head is the top part of the cylinder and engine.
a) True
b) False
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Explanation: The cylinder head is the top cover of the cylinder. It has the part of the combustion chamber. It is made up of cast iron or aluminium. Commonly called as head, it is bolted to the engine block.
4. What is a cylinder liner?
a) Inner part of a cylinder
b) Outer part of a cylinder
c) Cylinder cover
d) Cylinder bottom
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Explanation: The engine liner is a metal cylindrical part which is inserted into the engine block. It serves as inner walls of a cylinder made of alloys for low frictional properties. It is replaced if it is worn out. It is also called as sleeves.
5. Which liner acts as the only wall between piston and coolant?
a) Dry liner
b) Wet liner
c) Combined liner
d) Engine liner
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Explanation: The wet liner has contact with coolant which means there is a water jacket or passage to flow. It can have good heat dissipation compared to dry liners. There is also dry liner which fits into the block directly.
6. What is used as a sealant between the engine head and the cylinder block?
a) Engine seal
b) Engine cover
c) Mid seal
d) Head gasket
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Explanation: The head gasket is a sealant inserted between the head and the block. It prevents the leakage of coolant or engine oil into the cylinders. It ensures maximum compression inside the cylinder.
7. Which part of an engine is involved in the process of converting the reciprocating motion into the rotational motion?
a) Engine block
b) Crankshaft
c) Camshaft
d) Main shaft
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Explanation: A crankshaft is a shaft for converting the reciprocating motion of the piston into rotational motion. This is due to the crankshaft design. The crankshaft rotates according to the piston movement.
8. Which gear is intentionally connected between crankshaft and camshaft?
a) Timing
b) Main gear
c) Primary gear
d) Secondary gear
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Explanation: The timing gear is a gear connecting the camshaft from the crankshaft. This makes to operate the exhaust and inlet valves promptly and the camshaft rotates at half the speed of the crankshaft. There may be mostly gears for no slippage comparatively with belts.
9. Which engine comprises of cylinder head, block and crankcase in a single unit?
a) Combined engine
b) Monobloc engine
c) Tri bloc engine
d) Di bloc engine
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Explanation: The integral construction of an internal combustion engine having cylinder head, block and crankcase is a monobloc engine. It is done by a process called casting, which means the parts are made by solidifying the liquid into the desired mould.
10. The crankshaft is a linear (straight) shaft.
a) False
b) True
View Answer
Explanation: A crankshaft is not manufactured as a straight shaft. It is a shaft with cranks, crankpins, journals and counterweights forming a single shaft with various alignments and they are fitted accordingly to the connecting rod for making a rotational motion. The shaft also has to balance the rotation in non – power strokes.
11. What is enclosing the bottom of an engine?
a) Crankshaft
b) Crank cover
c) Crank base
d) Crankcase
View Answer
Explanation: The crankcase is a cover like structure in the bottom of an engine and housing for the crankshaft. In four-stroke engines, the crankcase is used as a reservoir for lubricant oil and from this, they are pumped to various parts of the engine. It is mostly a wet pump system.
Sanfoundry Global Education & Learning Series – Farm Tractor.
To practice all areas of Farm Tractor, here is complete set of Multiple Choice Questions and Answers.
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