Which of the following is the correct statement?
A. For a given compression ratio, both Otto and Diesel cycles have the same efficiency
B. For a given compression ratio, Otto cycle is more efficient than Diesel cycle.
C. For a given compression ratio, Diesel cycle is more efficient than Otto cycle.
D. The efficiency of Otto or Diessel cycle has nothing to do with compressioin ratio.
Answer B
Which of the following gas has the highest calorific value?
A. Coal gas
B. Producer gas
C. Mond gas
D. Blast furnace gas
Answer A
An open cycle gas turbine works on
A. Carnot cycle
B. Otto cycle
C. Joule's cycle
D. Stirling cycle
Answer C
The state of a substance whose evaporation from its liquid state is complete, is known as
A. vapour
B. perfect gas
C. Air
D. Steam
Coke is produced
A. when coal is first dried and then crushed to a fine powder by pulverising machine
B. from the finely ground coal by moulding under pressure with or without a binding material
C. when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
D. by heating wood with a limited supply of air to a temperature not less than 280°C
