Question 91 : A device used to increase the temperature of saturated steam without raising its pressure, is called
1. fusible plug
2. stop valve
3. superheater
4. blow off cock
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Question 92 : Willian's line for the steam engine is a straight line relationship between the steam consumption per hour and
1. indicated power
2. pressure of steam
3. efficiency
4. brake power
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Question 93 : A safety valve usually employed with stationary boilers is
1. high steam and low water safety valve
2. dead weight safety valve
3. lever safety valve
4. all of these
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Question 94 : In a glass rube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to
1. superheater
2. steam space
3. chimney
4. water space also
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Question 95 : Which of the following statement is correct for a compound steam engine ?
1. The ratio of expansion is reduced, thus reducing the length of stroke.
2. The temperature range per cylinder is increased, with corresponding increase in condensation.
3. The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
4. The forces in the working parts are increased as the forces are distributed over more parts.
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Question 96 : The object of producing draught in a boiler is
1. to discharge the gases of combustion to the atmosphere through the chimney
2. to exhaust the gases of combustion from the combustion chamber
3. all of the above
4. to provide an adequate supply of air for the fuel combustion
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Question 97 : When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
1. high speed steam engine
2. medium speed steam engine
3. none of these
4. slow speed engine
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