Related Questions

The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is
A Higher
B Lower
C Same as long as initial pressure and temperature is unchanged
D None of the above
For identical situation, condensing film coefficient in case of a horizontal condenser is almost __________ the value expected in case of vertical condenser.
A Half
B Twice
C Thrice
D Five times
Vertical condenser is advantageous to the horizontal condenser from operation point of view, when
A Hydrostatic head is required for refluxing the condensate
B Only the function of condensation is to be carried out
C Sub cooling of condensate is desired
D Both the functions of condensation & sub cooling are carried out in a single unit
If partial pressure of air and steam be ‘pa’ and ‘ps’ respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to
A ps - pa
B pa - ps
C pa + ps
D None of these
Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is
A Same
B Less
C About 3 times
D About 0.33 times
Regenerative feedback implies feedback with
A Oscillations
B Step input
C Negative sign
D Positive sign
In a regenerative feed heating cycle, the greatest economy is affected
A when steam is extracted from only one suitable point of steam turbine
B when steam is extracted from several places in different stages of steam turbine
C when steam is extracted only from the last stage of steam turbine
D when steam is extracted only from the first stage of steam turbine
In regenerative air preheaters, the heat is transferred
A From a metal wall from one medium to another
B From heating an intermediate material and then heating the air from this material
C By direct mixing
D Heat is transferred by bleeding some gas from furnace
An ideal regenerative cycle is
A Equal to Carnot cycle
B Less than Carnot cycle
C More than Carnot cycle
D Could be anything
Regenerative method of braking is based on that
A Back e.m.f. is less than the applied voltage
B Back e.m.f. is equal to the applied voltage
C Back e.m.f. of rotor is more than the applied voltage
D None of the above

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