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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

Kelvin Planck’s law deals with___________________?
A conservation of heat
B conservation of work
C conversion of heat into work
D conversion fo work into heat
Correct Answer: conversion of heat into work
The first law of thermodynamics is the law of_________________?
A conservation of mass
B conservation of energy
C conservation of momentum
D conservation of heat
Correct Answer: conservation of energy
Barometric pressure is equal to_____________________?
A 760 mm Hg
B zero mm Hg
C 735.6 mm Hg
D 1 mm Hg
Correct Answer: 760 mm Hg
Calorie is a measure of
A specific heat
B quantity of heat
C thermal capacity
D entropy
Correct Answer: quantity of heat
A sudden fall in the barometer reading is a sign of approaching________________?
A fine weather
B rains
C storm
D cold wave
Correct Answer: storm
During throttling process___________________?
A heat exchange does not take place
B no work is done by expanding steam
C there is no change of internal energy of steam
D all of the above
Correct Answer: all of the above
Compressed air coming out from a punctured football___________________?
A becomes hotter
B becomes cooler1
C remains at the same temperature
D may become hotter or cooler depend-ing upon the humidity of the surround¬ing air
Correct Answer: becomes cooler1
An adiabatic wall is one which__________________?
A prevents thermal interaction
B permits thermal interaction
C encourages thermal interaction
D discourages thermal interaction
Correct Answer: prevents thermal interaction
In a Carnot cycle, heat is transferred at_______________________?
A constant pressure
B constant volume
C constant temperature
D constant enthaply
Correct Answer: constant temperature
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is___________________?
A feasible
B impossible
C possible
D possible, but with lot of sophistications
Correct Answer: possible
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