Category: Compressors, Gas Turbines and Jet Engines

A. to increase the output
B. to increase the efficiency
C. to save fuel
D. to reduce the exit temperature
E. none of the above

A. increases
B. decreases
C. remains same
D. increases/decreases depending on com-pressor capacity
E. unpredictable

A. radial component
B. axial component
C. tangential component
D. resultant component

A. 1.03 kg/cm2
B. 1.06 kg/cm2
C. 1.00 kg/cm2
D. 0.53 kg/cm2
E. 0.5 kg/cm2

A. mass
B. energy
C. flow
D. linear momentum
E. angular momentum

A. adiabatic temperature drop in the stage
B. total temperature drop
C. total temperature drop in the stage
D. total adiabaitc temperature drop
E. difference of maximum and minimum temperature in the cycle

A. provides greater flexibility
B. provides lesser flexibility
C. in never used
D. is used when gas is to be burnt
E. none of the above

A. gas turbine is a self-starting unit
B. gas turbine does not require huge quantity of water like steam plant
C. exhaust losses in gas turbine are high due to large mass flow rate
D. overall efficiency of gas turbine plant is lower than that of a reciprocating engine
E. gas turbine can be easily started and stopped and thus is best suited for peaking demands

A. it allows maximum compression to be achieved
B. it greatly affects volumetric efficiency
C. it results in minimum work
D. it permits isothermal compression
E. none of the above

A. carbonisation of coal
B. passing steam over incandescent coke
C. passing air and a large amount of steam over waste coal at about 65°C
D. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
E. same way as the natural gas