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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

Mechanical efficiency of gas turbines as compared to I.C engines is____________________?
A higher
B lower
C same
D depends on on odier considerations
Correct Answer: higher
The fuel consumption in gas turbines is accounted for by___________________?
A low.er heating value
B higher heating value
C heating value
D higher calorific value
Correct Answer: low.er heating value
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is_______________?
A low
B high
C same
D low/high depending on make and type
Correct Answer: low
The work ratio of a gas turbine plant is defined as the ratio of__________________?
A net work output and heat supplied (6) net work output and work done by tur¬bine
B
C actual heat drop and isentropic heat drop
D net work output and isentropic heat drop
Correct Answer: net work output and isentropic heat drop
Rotary compressors are suitable for ____________________?
A large discharge at high pressure
B low discharge at high pressure
C large discharge at low pressure
D low discharge at low pressure
Correct Answer: large discharge at low pressure
Gas turbine works on______________?
A Brayton or Atkinson cycle
B Carnot cycle
C Rankine cycle
D Erricsson cycle
Correct Answer: Brayton or Atkinson cycle
Gas turbine works on_______________?
A Brayton or Atkinson cycle
B Carnot cycle
C Rankine cycle
D Erricsson cycle
Correct Answer: Brayton or Atkinson cycle
The pressure ratio of an ideal vaned compressor with increase in mass flow rate_________________?
A increases
B decreases
C remains constant
D first decreases and then increases
Correct Answer: remains constant
Actual compression curve is___________________?
A same as isothermal
B same as adiabatic
C better than isothermal and adiabatic
D in between isothermal and adiabatic
Correct Answer: in between isothermal and adiabatic
The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called__________________?
A pressure ratio
B pressure coefficient
C degree of reaction
D slip factor
Correct Answer: degree of reaction
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