250+ TOP MCQs on Classification based on Flow Passages and Flow Arrangement and Answers

Steam and Gas Turbines Multiple Choice Questions on “Classification based on Flow Passages and Arrangement”.

1. Multi spool gas turbines are operated at high pressure and high idle rpm.
a) True
b) False
Answer: a
Clarification: Multi spool gas turbine has high pressure spool operating at high idle rpm.

2. Based on type of flow arrangements gas turbines are classified into _____________
a) None of the mentioned
b) Impulse-reaction gas turbine
c) Open cycle gas turbine
d) Axial flow gas turbine
Answer: d
Clarification: Based on the type of flow, Gas turbines are divided into two types. They are axial flow gas turbines, radial flow gas turbines.

3. Identify the types of Gas turbines ___________
a) Turbo jet
b) Turboprop
c) Turbo fan
d) All of the mentioned
Answer: d
Clarification: Gas turbines are further classified into Turbojet, Turboprop, Turbofan, After burning Turbo jet.

4. Gas Turbine Engines, when compared to Reciprocating engines have ________
a) high power to weight ratio
b) low power to weight ratio
c) produce low power
d) none of the mentioned
Answer: a
Clarification: High power to weight ratio is the basic reason behind using Gas turbines in Air crafts thereby replacing reciprocating engines.

5. For producing Same power ____________
a) reciprocating engines will be smaller when compared to Gas turbine engines
b) gas turbine engines are smaller when compared to reciprocating engine counter parts
c) reciprocating engines are complex
d) none of the mentioned
Answer: b
Clarification: As for gas turbine Engine power to weight ratio is less when compared to reciprocating engine.

6. Most preferable Gas turbines are required to be used in _____________
a) fluctuating loads
b) constant loads
c) idling conditions
d) none of the mentioned
Answer: b
Clarification: Gas turbines are preferred to be used in constant load conditions as Fluctuating loads require fluctuating power for which fuel is more consumed.

7. Gas turbines work on ________
a) Otto cycle
b) Dual cycle
c) Brayton cycle
d) Diesel cycle
Answer: c
Clarification: Gas turbines works on brayton cycle.

8. Amount of fuel energy used by compressor is __________
a) half the total energy
b) two third of the total energy
c) one third of the total energy
d) none of the mentioned
Answer: b
Clarification: Two thirds of the total energy produced from combustion of fuel is used by compressor.

9. Gas turbine performance majorly depends on __________
a) compressor efficiency
b) calorific value of fuel used
c) nozzle efficiency
d) none of the mentioned
Answer: a
Clarification: As two thirds of the total energy produced from combustion is used by compressor, compressor efficiency plays a major role in determining Gas turbine performance.

10. Some of the types of combustors available are ___________
a) annular
b) can Annular
c) silo
d) all of the mentioned
Answer: d
Clarification: Types of Combustor are
Annular
Can Annular
Silo.