Question 71 : The function of crankcase in two stroke petrol engines is
1. It holds the engine lubricating oil
2. It forms a pressurised chamber for fuel air mixture
3. It holds the exhaust gases after combustion
4. None of the mentioned
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Question 72 : Which of these is not a cylinder head type of an ic engine
1. L head
2. I head
3. T head
4. X head
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Question 73 : In a Diesel cycle engine, combustion occurs at
1. Constant pressure
2. Constant temperature
3. Constant volume
4. Constant heat
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Question 74 : When no.1 piston of a four cylinder in line four stroke engine is performing the power stroke, no.4 piston is on the stroke called
1. Suction
2. Compression
3. Power
4. Exhaust
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Question 75 : The material known as high carbon high copper chrome silicon cast steel is used for making
1. Camshaft
2. Cylinder body
3. Cylinder head
4. Piston
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Question 76 : If the diameter of a piston is 'D' then the length of skirt is usually of the range of
1. 0.75D to 0.8D
2. 0.5D to D
3. 1.5D to 2D
4. 0.2D to 0.6D
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Question 77 : One 'ton of refrigeration' equals how much Btu/hr.
1. 14,500 Btu/hr
2. 12,000 Btu/hr
3. 13,000 Btu/hr
4. 15,000 Btu/hr
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Question 78 : The difference between dry liners and wet liners is
1. Cylinder liner touches the coolant jacket in wet liners
2. Wet liners are thicker than dry liners
3. Packing rings are present in wet liners
4. All of the mentioned
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Question 79 : The expansion process in diesel engine is
1. Isothermal
2. Adiabatic
3. Isobaric
4. None of the mentioned
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Question 80 : In case of four cylinder inline engine the number of firing strokes in one revolution of crank is
1. 1
2. 2
3. 3
4. 4
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