Mechanical Engineering MCQs

Page No. 187

Out of the following, from where you will prefer to take intake for air compressor_________________?


afrom an air conditioned room maintained at 20°C


bfrom outside atmosphere at 1°C


cfrom coal yard side


dfrom a side where cooling tower is located nearby



Volumetric efficiency of a compressor with clearance volume ________________?


aincreases with increase in compression ratio


bdecreases with increase in compression ratio


cin not dependent upon compression ratio


dmay increase/decrease depending on compressor capacity



Clearance volume in actual reciprocating compressors is essential __________________?


ato accommedate Valves in the cylinder head


bto provide cushioning effect


cto attain high volumetric efficiency


dto provide cushioning effect and also to avoid mechanical bang of piston with cylinder head



The net work input required for compressor with increase in clearance volume_____________________?


aincreases


bdecreases


cremains same


dincreases/decreases depending on com-pressor capacity


View Answer remains same

The ratio of work doen per cycle to the swept volume in case of compressor is called ______________?


acompression index


bcompression ratio


ccompressor efficiency


dmean effective pressure



Ratio of compression is the ratio of__________________?


agauge discharge pressure to the gauge intake pressure


babsolute discharge pressure to the ab-solute intake pressure


cpressures at discharge and suction cor-responding to same temperature


dstroke volume and clearance volume



Volumetric efficiency is_____________________?


athe ratio of stroke volume to clearance volume


bthe ratio of the air actually delivered to the amount of piston displacement


creciprocal of compression ratio


dindex of compressor performance



Volumetric efficiency of a compressor without clearance volume________________?


aincreases with increase in compression ratio


bdecreases with increase in compression ratio


cis not dependent upon compressin ratio


dmay increase/decrease depending on compressor capacity



Volumetric efficiency of air compressors is of the order of________________?


a20-30%


b40-50%


c60-70%


d70-90%


View Answer 70-90%

Cylinder clearance in a compressor should be _________________?


aas large as possible


bas small as possible


cabout 50% of swept volume


dabout 100% of swept volume


View Answer as small as possible

Goto Page No.

Page 187 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