Test: Power Plant Engineering- 1

What is the range of Thermal efficiency in Brayton cycle?

If helium is used instead of air the efficiency of brayton cycle.

The relationship between work ratio and back work ratio (BWR) is

isoentropic efficiency in a turbine is considered to account for

In Rankine cycle which of the following is neglisible compared to others.

The formula for specific fuel consumbtion in kg/ kw hr is

Due to superheating dryness fraction in Rankine cycle.

Bleeding of steam occurs in

In a Rankine cycle if boiler pressure is increased the efficiency of the cycle

Which of the following increases cycle efficiency

Reciprocating compressor is used for.
i. High pressure ratio
ii. High Discharge
iii. Small Pressure ratio
iv. small discharge

If clearance volume decreases The volumetric efficiency of a reciprocating compressor

The net work output is minimum during compression for

 For a 3 stage compression from 1 bar to 27 bar the intermediate pressure at last stage for perfect intercooling is

Which of the following blades gives maximum pressure ratio

In which of the following compressors air flows radially.

If drop in enthalpy in moving blades is 150 kJ and in fixed blades in 300 kJ. The degree of reaction is

Surging in a compressor means

For supersonic flow a diverzing passage behaves as.

In a converzing diverzing nozzle at chocked condition the relation between throat temperature (T₂) and Inlet temperature (T₁) is

The size of which of the following turbine is largest.

The cross section between blade passage in a simple impulse turbine is