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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

Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?
A desirable
B economical
C essential
D optional
Correct Answer: economical
Steam exhaust from high pressure turbine is reheated in _____________________?
A boiler drum
B superheater tubes
C economiser
D a separate coil
Correct Answer: a separate coil
The safety valve at superheater as compared to drum safety valve setting is set at___________________?
A higher value
B lower value
C same value
D any value
Correct Answer: lower value
The pressure of reheat steam after passing through reheater compared to inlet condition is _________________?
A more
B less
C equal
D may be more or less depending on capacity of reheater
Correct Answer: less
In regenerative air preheater, the heat is transferred _____________________?
A from a metal wall from one medium to another
B from heating an intermediateanaterial and then heating the air from this material
C by direct mixing
D heat is transferred by bleeding some gas from furnace
Correct Answer: from heating an intermediateanaterial and then heating the air from this material
A safety valve in a locomotive starts leaking. The leaking medium will be_________________?
A water
B dry steam
C wet steam
D super heated steam
Correct Answer: super heated steam
The diameter of fire tubes in Cochran boiler is of the order of___________________?
A 2 cm
B 6 Cm ,
C 8 cm
D 12 cm
Correct Answer: 6 Cm ,
With increase in load, radiant super heater has____________________?
A drooping characteristic
B lihear characterisstic
C rising characteristic
D flat characteristic
Correct Answer: drooping characteristic
The major axis of elliptical manholes on the shell should be provided___________________?
A longitudinally
B circumferentially
C on dished end
D anywhere
Correct Answer: circumferentially
Size of boiler tubes is specified by___________________?
A mean diameter and thickness
B inside diameter and thickness
C outside diameter and thickness
D outside diameter and inside diameter
Correct Answer: outside diameter and thickness
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