Related Questions

For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
A More
B Less
C Equal
D Either A or B; depends on the viscosity of the fluid
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
The exhaust valve in a four stroke cycle petrol engine
A Opens at 50° before bottom dead center and closes at 15° after top dead center
B Opens at bottom dead center and closes at top dead center
C Opens at 50° after bottom dead center and closes at 15° before top dead center
D May open and close anywhere
In a four stroke cycle diesel engine, the exhaust valve
A Opens at 30° before bottom dead centre and closes at 10° after top dead centre
B Opens at 30° after bottom dead centre and closes at 10° before top dead centre
C Opens at bottom dead centre and closes at top dead centre
D May open and close anywhere
The inlet valve of a four stroke cycle internal combustion engine remains open for
A 130°
B 180°
C 230°
D 270°
In a four stroke cycle diesel engine, the inlet valve
A Opens at 20° before top dead center and closes at 40° after bottom dead center
B Opens at 20° after top dead center and closes at 20° before bottom dead center
C Opens at top dead center and closes at bottom dead center
D May open and close anywhere
In a four stroke cycle petrol engine, the inlet valve
A Opens at top dead center and closes at bottom dead center
B Opens at 20° before top dead center and closes at 40° after bottom dead center
C Opens at 20° after top dead center and closes at 20° before bottom dead center
D May open or close anywhere
The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
A P, Q and R
B P and R
C R and S
D P, R and S
Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.
A Smaller than
B Larger than
C Same as
D Twice
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, 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

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