A. it is inefficient
B. it is bulky
C. it requires cooling water for its operation
D. non of theses
A. increases
B. decreases
C. remains same
D. first increases and then decreases
E. first decreases and then increases
A. more
B. less
C. same
D. depends on other factors
E. unpredictable
A. stainless steel
B. high alloy’ steel
C. duralumin
D. Timken, Haste and Inconel allpys
E. titanium
The material commonly used for air craft gas turbine is__________________? Read More »
Compressors, Gas Turbines and Jet Engines A. pressure ratio
B. maximum cycle temperature
C. minimum cycle temperature
D. all of the above
E. none of the above
The ideal efficiency of simple gas turbine cycle depends on________________? Read More »
Compressors, Gas Turbines and Jet Engines A. remain same
B. decrease
C. increase
D. unpredictable
E. none of the above
A. 50%
B. 75%
C. 85%
D. 90%
E. 99%
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 caol, eke, anthractie coal or charcoal in a mixed air steam blast
E. same way as the natural gas
Water gas is produced by ___________________ ? Read More »
Compressors, Gas Turbines and Jet Engines A. increases
B. decreases
C. first increases and then decreases
D. first decreases and then increases
E. remains same
A. heated
B. compressed air before entering the combustion chamber is heated
C. bled gas from turbine is heated and readmitted for complete expansion
D. exhaust gases drive the compressor
E. part of exhaust gases are heated and mixed up with atmospheric air to utilise exhaust heat
