A system having connected load of 100 kW, peak load of 80 kW, base load of 20 kW and average load of 40 kW will have a load factor of
A.40%
B.50%
C.60%
D.75%
E.80%
Category: Heat Engines Mcqs
In jet engines the compression ratio
A.Varies with altitude
B.Varies with altitude
C.Varies with square of speed
D.Remains constant
E.Depends on other factors
A gas turbine works on
A.Carnot cycle
B.Brayton cycle
C.Dual cycle
D.Rankine cycle
E.Regenerative cycle
Vapour lock is
A.Seizure of supply of fuel in a diesel engine
B.Serious restriction to the supply of fuel due to excessively rapid formation of vapour in S.I. engine
C.Locking of carbourettor jets due to vapour formation
D.Locking of jets due to impurities in petrol
E.None of the above
Dissociation is
A.Same is combustion
B.Process of heat liberation in which no flame exist
C.Slow combustion
D.Smokeless combustion
E.Combustion without heat
If performance of SI engines of different manufacture having different capacities, sizes and systems are to be compared the common parameter would be
A.Engine cylinder diameter
B.B.H.P.
C.Speed
D.Mean effective pressure
E.Weight of engine
A petrol engine as compared to diesel engine (both running at full load) is
A.More efficient
B.Less efficient
C.Equally efficient
D.Depend on other factors
E.None of the above
High air-fuel ratio in gas turbines
A.Reduces the exhaust temperature
B.Improves thermal efficiency
C.Increases power output
D.Restricts damage to turbine blades
E.None of the above
Thermodynamic processes are those
A.Where a difference is observed in any macroscopic property of the system between different times or state
B.Where a difference is observed in any microscopic property of the system between different times or state
C.Which occurs in the direction of an intensive property or driving force contained within the system
D.Which require an agency outside the system to force the process
E.None of the above
The maximum temperature in a gas turbine is of the order of
A.700?C
B.1000?C
C.1500?C
D.2000?C
E.2500?C
