Mechanical Engineering MCQs

2075 MCQs  (Page 10 of 208)

The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?
A. Increases
B. Decreases
C. Remains constant
D. First decreases and then increases
Gas turbine works on_______________?
A. Brayton or atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Erricsson cycle
Gas turbine works on______________?
A. Brayton or atkinson cycle
B. Carnot cycle
C. Rankine cycle
D. Erricsson cycle
Rotary compressors are suitable for ____________________?
A. Large discharge at high pressure
B. Low discharge at high pressure
C. Large discharge at low pressure
D. Low discharge at low pressure
The work ratio of a gas turbine plant is defined as the ratio of__________________?
A. Net work output and heat supplied
B. Net work output and work done by turbine
C. Actual heat drop and isentropic heat drop
D. Net work output and isentropic heat drop
E. isentropic increase/drop in tempera¬ture and actual increase/ drop in temperature
The fuel consumption in gas turbines is accounted for by___________________?
A. Low.er heating value
B. Higher heating value
C. Heating value
D. Higher calorific value
Gas turbine blades are given a rake___________________?
A. Equal to zero
B. In the direction of motion of blades
C. Opposite to the direction of motion of blades
D. Depending on the velocity