26. The reflectivity in a reactor depends upon-
A. The geometry of the reflector
B. Properties of the reflector
C. The energy of the reflector
D. All the above
27. Acoustic velocity in an elastic gaseous medium is proportional to-
A. Absolute temperature
B. Stagnation temperature
C. The square root of stagnation temperature
D. The square root of absolute temperature
28. The device used to heat feed-water by utilizing the heat of the exhaust flue gases before leaving through the chimney is called-
A. Superheater
B. Economizer
C. ID fan
D. Air Preheater
29. Turbo prop-engine has the following additional feature over the turbojet-
A. Diffuser
B. Propeller
C. Starting engine
D. Turbine and Combustion chamber
30. In Rayleigh flow at subsonic Mach numbers, heat addition-
A. Decreases static pressure
B. Decreases enthalpy
C. Decreases static temperature
D. Increases static pressure