Turbofan engine employs
A). One air stream
B). Two or more air streams
C). No air stream
D). Solid fuel firing
Choose the correct statement
A). Gas turbine requires lot of cooling water
B). Gas turbine is capable of rapid start up and loading
C). Gas turbines has flat efficiency at part loads
D). Gas turbines have high standby losses and require lot of maintenance
Pick up the correct statement
A). Closed cycle gas turbine is an I.C engine
B). Gas turbine uses same working fluid over and over again
C). Ideal efficiency of closed cycle gas turbine plant is more than Carnot cycle efficiency
D). Thrust in turbojet is produced by nozzle exit gases
An after-cooler is used to
A). Remove impurities from air
B). Reduce volume of air
C). Cause moisture and oil vapour to drop out
D). Cool the air
After-cooler is used to
A). Cool the air
B). Decrease the delivery temperature for ease in handling
C). Cause moisture and oil vapour to drop out
D). Reduce volume