Question 31 : In cross compounding, the cylinders are arranged
1. at 90° and each cylinder has separate piston, connecting rod and crank
2. side by side and each cylinder has common piston, connecting rod and crank
3. at 90° and each cylinder has common piston, connecting rod and crank
4. side by side and each cylinder has separate piston, connecting rod and crank
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Question 32 : A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as
1. stop valve
2. superheater
3. blow off cock
4. fusible plug
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Question 33 : Expansion ratio is the ratio of
1. swept volume to the volume at cut-off
2. volume at cut-off to the swept volume
3. swept volume to the clearance volume
4. clearance volume to the swept volume
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Question 34 : Cut-off governing as compared to throttle governing is
1. more efficient and more economical
2. less efficient and less economical
3. less efficient and more economical
4. more efficient and less economical
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Question 35 : The fire tubes in a Cochran boiler usually have __________ diameter.
1. 6.25 mm
2. 62.5 mm
3. 92.5 mm
4. 72.5 mm
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Question 36 : Throttle governing of steam engines is a method of controlling the engine output by varying
1. pressure of intake steam
2. temperature of intake steam
3. volume of intake steam
4. all of these
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Question 37 : The performance of a boiler is measured by the
1. steam produced in kg/h
2. all of these
3. amount of water evaporated per hour
4. steam produced in kg/kg of fuel burnt
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Question 38 : Benson boiler requires
1. one drum
2. two drums
3. three drums
4. no drum
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Question 39 : The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks
1. 0° to each other
2. 180° to each other
3. none of these
4. 90° to each other
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Question 40 : The heat balance sheet for the boiler shows the
1. moisture present in the fuel
2. steam formed by combustion of hygrogen per kg of fuel
3. complete account of heat supplied by 1 kg of dry fuel and the heat consumed
4. all of the above
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