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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

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle___________________?
A more
B less
C equal
D depends on other factors
Correct Answer: equal
Carnot cycle is__________________?
A a reversible cycle (ft) an irreversible cycle
B
C a semi-reversible cycle
D a quasi static cycle
Correct Answer: a reversible cycle (ft) an irreversible cycle
For same compression ratio and for same heat added_________________?
A Otto cycle is more efficient than Diesel cycle
B Diesel cycle is more efficient than Otto cycle
C efficiency depends on other factors
D both Otto and Diesel cycles are equally efficient
Correct Answer: Otto cycle is more efficient than Diesel cycle
Otto cycle consists of following four processes____________________?
A two isothermals and two isentropics
B two isentropics and two constant volumes
C two isentropics, one constant volume and one constant pressure
D two isentropics and two constant pres-sures
Correct Answer: two isentropics and two constant volumes
Thermal power plant works on______________?
A Carnot cycle
B Joule cycle
C Rankine cycle
D Otto cycle
Correct Answer: Rankine cycle
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
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