Thermodynamic cycles (Brayton, Rankine, and Carnot cycles) MCQs – Aerospace

1. The Brayton cycle is primarily used in which type of engine?
(A) Gas turbine engine
(B) Steam engine
(C) Diesel engine
(D) Stirling engine

2. The Rankine cycle is commonly associated with which type of power generation?
(A) Steam power plants
(B) Gas turbine engines
(C) Internal combustion engines
(D) Refrigeration systems

3. The Carnot cycle is idealized to achieve:
(A) Maximum efficiency between two heat reservoirs
(B) Maximum power output
(C) Minimum entropy generation
(D) Maximum heat transfer

4. In the Brayton cycle, the compression process occurs at:
(A) Constant pressure
(B) Constant volume
(C) Constant temperature
(D) Variable pressure

5. In the Rankine cycle, the working fluid undergoes phase change in which component?
(A) Boiler
(B) Turbine
(C) Condenser
(D) Pump

6. The efficiency of the Carnot cycle depends on:
(A) The temperatures of the hot and cold reservoirs
(B) The pressure ratio of the working fluid
(C) The type of working fluid used
(D) The specific work done by the engine

7. The Brayton cycle consists of which four main processes?
(A) Isentropic compression, isentropic expansion, isobaric heat addition, and isobaric heat rejection
(B) Isentropic compression, isentropic expansion, isochoric heat addition, and isochoric heat rejection
(C) Isentropic compression, isentropic expansion, isobaric heat addition, and isentropic heat rejection
(D) Isentropic compression, isothermal heat addition, isothermal heat rejection, and isentropic expansion

8. In the Rankine cycle, the turbine converts:
(A) Thermal energy into mechanical work
(B) Mechanical work into thermal energy
(C) Heat into electrical energy
(D) Mechanical work into heat

9. The Carnot cycle includes which of the following processes?
(A) Isothermal expansion, adiabatic expansion, isothermal compression, and adiabatic compression
(B) Isentropic compression, isentropic expansion, isobaric heat addition, and isobaric heat rejection
(C) Isothermal expansion, isothermal compression, adiabatic expansion, and adiabatic compression
(D) Isentropic compression, isentropic expansion, isochoric heat addition, and isochoric heat rejection

10. In the Brayton cycle, the heat addition process occurs at:
(A) Constant pressure
(B) Constant volume
(C) Constant temperature
(D) Variable temperature