Mechanical Engineering MCQs

2075 MCQs  (Page 93 of 208)

Gas turbine cycle consists of___________________?
A. Two isothermals and two isentropics
B. Two isentropics and two constant volumes
C. Two isentropics, one constant volume and one constant pressure
D. Two isentropics and two constant pressures
The following cycle is used for air craft refrigeration___________________?
A. brayton cycle
B. joule cycle
C. carnot cycle
D. bell-coleman cycle
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that___________________?
A. Carnot cycle can’t work with saturated steam
B. Heat is supplied to water at temperature below the maximum temperature of the cycle
C. A rankine cycle receives heat at two places
D. Rankine cycle is hypothetical
The efficiency of Diesei cycle with decrease in cut off_________________?
A. Increases
B. Decreases
C. Remains unaffected
D. First increases and then decreases
Reversed joule cycle is called_________________?
A. Carnot cycle
B. Rankine cycle
C. Brayton cycle
D. Bell coleman cycle
Stirling and Ericsson cycles are__________________?
A. Reversible cycles
B. Irreversible cycles
C. Quasi-static cycles
D. Semi-reversible cycles
Diesel cycle consists of following four processes_________________?
A. Two isothermals and two isentropics
B. Two isentropics, and two constant volumes.
C. Two isentropics, one constant volume and one constant pressure
D. Two isentropics and two constant pressures