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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

A compressor at high altitude will draw________________?
A more power
B less power
C same power
D more/less power depending on other factors
Correct Answer: less power
A centrifugal compressor works on the principle of__________________?
A conversion of pressure energy into kinetic energy
B conversion of kinetic energy into pres¬sure energy
C centripetal action
D generating pressure directly
Correct Answer: conversion of kinetic energy into pres¬sure energy
The compressor performance at higher altitude compared to sea level will be _______________?
A same
B higher
C lower
D dependent on other factors
Correct Answer: lower
During peak load periods, the best method of controlling compressors is___________________?
A start-stop motor
B constant speed unloader
C relief valve
D variable speed
Correct Answer: constant speed unloader
An air compressor may be controlled by____________________?
A throttle control B. clearance control
B
C blow-off control
D any one of the above
Correct Answer: any one of the above
Separators in compressor installations are located_____________________?
A before intercooler
B after intercooler
C after receiver
D between after-cooler and air receiver
Correct Answer: between after-cooler and air receiver
Mining industry usually employs following motive power___________________?
A A.C. electric motor
B compressed air
C petrol engine
D diesel engine
Correct Answer: compressed air
In multistage compressor, the isothermal compression is achieved by_________________?
A employing intercooler
B by constantly cooling the cylinder
C by running compressor at very slow speed
D by insulating the cylinder
Correct Answer: by running compressor at very slow speed
The capacity of compressor will be highest when its intake temperature is___________________?
A lowest
B highest
C anything.
D atmospheric
Correct Answer: atmospheric
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