Related Questions

Cut-off governing of steam engines is a method of controlling the engine output by varying
A Volume of intake steam
B Pressure of intake steam
C Temperature of intake steam
D All of these
Cut-off governing as compared to throttle governing is
A Less efficient and less economical
B Less efficient and more economical
C More efficient and less economical
D More efficient and more economical
When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as
A Throttle governing
B Cut-off governing
C By-pass governing
D None of these
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
A 10 atmospheres
B 20 atmospheres
C 30 atmospheres
D 40 atmospheres
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
A Cause withdrawing or throttling of steam
B Reduce length of effective stroke of piston
C Reduce maximum opening of port to steam
D All of these
A single acting steam engine produces __________ power than that of double acting steam engine.
A equal
B double
C half
D 4 times
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.
A Equal to
B Twice
C Three times
D Four times
In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.
A Equal to
B Lower than
C Higher than
D None of these
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?
A A steam turbine develops higher speeds
B The efficiency of steam turbine is higher
C The steam consumption is less
D All of these
Expanding steam to a very low pressure (high vacuum) in steam engines is
A Desirable
B Economical
C Essential
D Uneconomical

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