11. Bomb Calorimeter is used to determine the calorific value of-
A. Solid fuel only
B. Gaseous fuel only
C. Solid and Gaseous fuels both
D. Solid and Liquid fuels both
12. Once through boilers operate at-
A. critical pressure only
B. supercritical pressure
C. subcritical pressure
D. subcritical pressure as well as supercritical pressures
13. The reheat cycle in steam power is mainly adopted to-
A. decrease the capacity of a condenser
B. recover the waste heat of the boiler
C. Improve thermal efficiency
D. decrease the moisture content in low-pressure stages to a safe value
14. Centrifugal compressors are suitable for large discharge and wider mass flow range, but at a relatively low discharge pressure of the order of 10 bars, because of-
A. low-pressure ratio
B. large speeds
C. high compression index
D. limitation of the size of the receiver
15. What is the ratio of the isentropic work to Euler’s work known as-
A. Slip factor
B. Work Factor
C. Pressure coefficient
D. Degree of reaction