Question 81 : In a four stroke cycle engine camshaft revolves at ______ the crank speed.
1. Two times
2. Half
3. Four times
4. Three times
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Question 82 : Aluminium cylinder blocks require
1. Cast iron Liners
2. Brass Liners
3. Aluminium Liners
4. No Liners
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Question 83 : The efficiency of a combined cycle gas turbine(steam cooled) can range as high as
1. 20%
2. 30%
3. 40%
4. 60%
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Question 84 : In S.I engine the intake valve closes
1. At BDC
2. At TDC
3. 25 degree to 84 degree after BDC
4. 10 degree to 20 degree before TDC
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Question 85 : The gears on camshaft and crankshaft are known as
1. Lining gears
2. Aligning gears
3. Timing gears
4. Tuning gears
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Question 86 : In internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is
1. 5%
2. 10%
3. 30%
4. 60%
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Question 87 : In a four stroke S.I engine the exhaust valve usually opens
1. At BDC
2. 35 degree to 60 degree before BDC
3. 35 degree to 60 degree after BDC
4. 10 degree to 20 degree before BDC
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Question 88 : Camshaft gear is made from which material
1. Cast iron
2. Mild steel
3. Bakelite
4. Brass
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