Gas Power System

A gas turbine power plant uses

• Otto cycle

• Rankine cycle

• Brayton cycle

• Diesel cycle

The Brayton cycle consists of

• two reversible isotherms and two reversible isobars

• two reversible isochores and two reversible adiabatics

• two reversible isotherms and two reversible isochores

• two reversible isobars and two reversible adiabatics

One stream of fluid enters an ideal open feedwater heater after exiting the first turbine stage and another stream of fluid enters the feedwater heater after passing through a condenser and a pump. The pressure of stream A is _______ the pressure of stream B.

• greater than

• less than

• equal to

• none of the mentioned

The streams of fluid do not mix in

• an open feedwater heater

• a closed feedwater heater

• both OFH & CFH

• none of the mentioned

Which of the following is true for the Brayton cycle?

• first sir is compressed reversibly and adiabatically

• heat is added reversibly at constant pressure

• air expands in turbine reversibly and adiabatically

• all of the mentioned

Which Rankine cycle component has the greatest internal irreversibilities?

• boiler

• pump

• condenser

• turbine

The efficiency of Brayton cycle depends on

• compression ratio

• pressure ratio

• either compression ratio or pressure ratio

• both compression ratio and pressure ratio

For the same compression ratio, the efficiency of Brayton cycle is ____ the efficiency of Otto cycle.

• less than

• equal to

• greater than

• none of the mentioned

Regeneration cannot be added to a vapor power cycle with reheat

• true

• false

Both Rankine cycle and Brayton cycle consists of two reversible isochores and two reversible adiabatics.

• false

• true