Are you guys looking for Mechanical Engineering MCQ Questions with Answers PDF Free Download as per Mechanical Engineering new exam pattern? You came to the right page. This may assist you to understand and check your knowledge about the Subjects. Students also can take a free test of the Multiple Choice Questions of Mechanical Engineering. Each question has four options followed by the right answer. These Mechanical Engineering MCQ Questions are selected supported by the newest exam pattern.
Q1. The volume of air delivered by the compressor is called
(A) Free air delivery
(B) Compressor capacity
(C) Swept volume
(D) None of these
Answer: (B) Compressor capacity
Q2. The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the
(A) Adiabatic temperature drop in the stage
(B) Total temperature drop
(C) Total temperature drop in the stage
(D) Total adiabatic temperature drop
Answer: (C) Total temperature drop in the stage
Q3. The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is
(A) Same
(B) Higher
(C) Lower
(D) None of these
Answer: (C) Lower
Q4. Which of the following plants is smallest and lightest for generating a given amount of power?
(A) Gas turbine plant
(B) Petrol engine
(C) Diesel engine
(D) Solar plant
Answer: (A) Gas turbine plant
Q5. Standard air is the air at
(A) Atmospheric conditions at any specific location
(B) 20°C and 1 kg/cm² and relative humidity 36%
(C) 0°C and standard atmospheric conditions
(D) 15°C and 1 kg/cm²
Answer: (B) 20°C and 1 kg/cm² and relative humidity 36%
Q6. During base load operation, the best method of controlling compressor is
(A) Start-stop motor
(B) Constant speed unloader
(C) Relief valve
(D) Variable speed
Answer: (A) Start-stop motor
Q7. Stalling of blades in axial flow compressor is the phenomenon of
(A) Air stream blocking the passage
(B) Motion of air at sonic velocity
(C) Unsteady periodic and reversed flow
(D) Air stream not able to follow the blade contour
Answer: (D) Air stream not able to follow the blade contour
Q8. If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity
(A) Vi = Vo
(B) Vt > Vo
(C) U < Vo
(D) V = Uo
Answer: (A) Vi = Vo
Q9. The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)
(A) (v₁² -v₂²)/2g
(B) (v₁ – v₂)²/2g
(C) (v₁² -v₂²)/g
(D) (v₁ – v₂)²/g
Answer: (A) (v₁² -v₂²)/2g
Q10. Inter-cooling in gas turbine results in
(A) Increase in net output but decrease in thermal efficiency
(B) Increase in thermal efficiency but decrease in net output
(C) Increase in both thermal efficiency and net output
(D) Decrease in both thermal efficiency and net output
Answer:(A) Increase in net output but decrease in thermal efficiency
Q11. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
(A) Rotor to static enthalpy rise in the stator
(B) Stator to static enthalpy rise in the rotor
(C) Rotor to static enthalpy rise in the stage
(D) Stator to static enthalpy rise in the stage
Answer:(C) Rotor to static enthalpy rise in the stage
Q12. In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is __ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.
(A) Equal to
(B) Less than
(C) Greater than
(D) None of these
Answer:(A) Equal to
Q13. The type of rotary compressor used in gas turbines, is of
(A) Centrifugal type
(B) Axial flow type
(C) Radial flow type
(D) None of these
Answer: (B) Axial flow type
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- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 01
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 02
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 03
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 04
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 05
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 06
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 07
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 08
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 09
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 10
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 11
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 12
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 13
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 14
- Compressors, Gas Turbines and Jet Engines MCQ Practice Test – Set 15