Mechanical Engineering Objective Questions { Power Plant Engineering }

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218. In a cross compound steam engine

A. One high and one low pressure cylinder are set side•by side, driving the same shaft, cranks being set 90° apart

B. Two cylinders are centred on the same piston rod, the 1.p. cylinder being placed nearest the crankshaft

C. Two cylinders are set at 90°, usually to save floor space

D. Two cylinders are set in V-arrangement

219. Diagram factor is defmed as the ratio of

A. Actual m.e.p. and swept volume

B. Theoretical m.e.p. and swept volume

C. Actual m.e.p. and theoretical m.e.p.

D. Theoretical m.e.p. and actual m.e.p.

220. The average value of diagram factor for various types of steam engines is approximately

221. The steam admission pressure in case of steam locomotives is of the ordei of

D. 25-40 kg/cm2

222. The back pressure in a locomotive steam engine is of the order of

A. Atmospheric pressure

223. The saturation curve of a steam engine rep-resents-

A. The saturated state of steam

B. The quantum of missing quantity

C. The curve drawn through the points of dry volume

D. The condition of steam at exhaust corresponding to various inlet conditions

224. The steam trap is employed to

A. Condense the steam

B. Separate condensate from steam

C. Drain off condensate resulting from partial condensation

D. Keep steam, superheated

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