253. In reciprocating steam engines the live steam is passed through the jackets of steam cylinders in order to
A.Increase temperature of steam
B.Maintain cylinder team at constant temperature
C.Bypass the unwanted steam
D.Reduce condensation of steam in cylinders

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254. The effect of wire drawing of steam on the area of indicator diagram is to
A.Increase
B.Decrease
C.No effect
D.Increase/decrease depending on steam pressure

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255. In the tandem compound steam engine, the axes of the two cylinders
A.Are at 900 to each other
B.Are inclined at 450
C.Are in the same straight line
D.Lie in different planes

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256. In receiver type of compounding, the cranks are placed
A.45° apart
B.90° apart
C.180° apart
D.270'apart

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257. In a tandem compound engine, the high pressure and low pressure cylinders
A.Have common piston rod
B.Have separate piston rods
C.Are set at 900
D.Are set in V-arrangement

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258. In Wolf type as well as receiver type compound engines, the high pressure, and low pressure cylinders
A.Have common piston rod
B.Have separate piston rods
C.Are set at 90°
D.Are set in V-arrangement

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259. The cranks of high pressure and low pressure cylinders in a Woolf type compound steam engine are placed
A.O'apart
B.45° apart
C.90° apart
D.180° apart

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