Mechanical Engineering MCQs

Page No. 182

Axial flow compressor has the following advantage over centrifugal compressor__________________?


alarger air handling ability per unit frontal area


bhigher pressure ratio per stage


caerofoil blades are used


dhigher average velocities



Maximum delivery pressure is a rotary air compressor is of the order of__________________?


a6 kg/cm2


b10 kg/cm2


c16 kg/cm2


d25 kg/cm2


View Answer 10 kg/cm2

The thermodynamic efficiency of rotary compressor is based on_______________?


aisothermal compression


badiabatic compression


cisentropic compression


dpolytropic compression


View Answer adiabatic compression

Surging is the phenomenon of___________________?


aair stream blocking the passage


bmotion of air at sonic velocity


cunsteady, periodic and reversed flow


dair stream not able to follow the blade contour



The maximum compression ratio in an actual single stage axial flow comperssor is of the order of________________?


a1 : 1.2


b1 : 2


c1 : 5


d1 : 10


View Answer 1 : 1.2

The ratio of isentropic work to euler’s work is known as _____________________?


acompressor efficiency


bisentropic efficiency


cEuler’s efficiency


dpressure coefficient


View Answer pressure coefficient

The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?


aslip factor


bvelocity factor


cvelocity coefficient


dblade effectiveness


View Answer slip factor

More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than____________________?


a2 kg/cm2


b6 kg/cm2


c10 kg/cm2


d14.7 kg/cm2


View Answer 2 kg/cm2

Pick up the wrong statement about advantages of multistage compression____________________?


abetter lubrication is possible advantages of multistage


bmore loss of air due to leakage past the cylinder


cmechanical balance is better


dair can be cooled perfectly in between



Losses in a centrifugal compressor are due to__________________?


ainlet losses


bimpeller channel losses


cdiffuser losses


dall of the above


View Answer all of the above

Goto Page No.

Page 182 of 190

Alphabetical MCQs Categories

Here below You find all kind of categories of MCQs in alphabetical order.


"Comprehensive Collection of MCQs: Alphabetically Organized by Subject"

"Discover an extensive collection of multiple-choice questions (MCQs) neatly categorized by subject from A to Z. This resource is designed for anyone eager to explore various topics in a straightforward and organized manner. Whether you're a student preparing for exams, an educator seeking supplementary materials, or simply curious about different subjects, this compilation offers a convenient way to learn and assess your knowledge. With questions arranged alphabetically, navigation is effortless, allowing you to delve into subjects of interest at your own pace. Engage, learn, and expand your understanding with this accessible and comprehensive repository of MCQs!"


BolPakistan

bolpakistan.com.pk includes Job Mcqs and Pak Mcqs is the Top Largest Mcqs Forum in World, in which you can read Mcqs of All Subjects, PPSC test preparation, FPSC, NTS and PPSC PAST PAPERS, PPSC PAST MCQS. A Collection of Repeated MCQs for JOBs seekers.

Copyright © 2024, Designed & Developed by BolPakistan