Mechanical Engineering MCQs

Page No. 189

Standard air is the air at_____________________?


aatmospheric conditions at any specific location

✖


b20°C and 1 kg/cm2 and relative humidity 36%

✓


c0°C and standard atmospheric conditions

✖


d15°C and 1 kg/cm2

✖



Maximum work is done in compressing air when the compression is_________________?


aisothermal

✖


badiabatic

✓


cpolytropic

✖


dany one of the above

✖


View Answer adiabatic

The capacity of a compressor is 5 m /mih. 5 m /min refers to_______________?


astandard air

✖


bfree air

✓


ccompressed air

✖


dcompressed air at delivery pressure

✖


View Answer free air

Free air is the air at________________?


aatmospheric conditions at any specific location

✓


b20°C and 1 kg/cm2 and relative humidity of 36%

✖


c0°C and standard atmospheric conditions

✖


d15°C and 1 kg/cm2

✖



1 m of air at atmospheric condition weighs approximately__________________?


a0.5 kg

✖


b1.0 kg

✖


c1.3 kg

✓


d2.2 kg

✖


View Answer 1.3 kg

The overall isothermal eiffciency of compressor is defined as the ratio of_______________?


aisothermal h.p. to the BHP of motor

✓


bisothermal h.p. to adiabatic h.p.

✖


cpower to drive compressor to isothermal h.p.

✖


dwork to compress air isothermally to work for actual compression

✖



The pressure and temperature conditions of air at the suction of compressor are_________________?


aatmospheric

✖


bslightly more than atmospheric

✖


cslightly less than atmospheric

✖


dpressure sightly less than atmospheric and temperature slightly more than atmospheric

✓



Isothermal compression efficiency, even when running at high speed, can be approached by using A. multi-stage compression B. cold water spray C. both A. and B. above D. fully insulating the cylinder E. high stroke_________________?


amulti-stage compression

✖


bcold water spray

✖


cboth A. and B. above

✓


dfully insulating the cylinder

✖


View Answer both A. and B. above

Isothermal compression effeicency can be attained by running the compressor__________________?


aat very high speed

✖


bat very slow speed

✓


cat average speed

✖


dat zero speed

✖


View Answer at very slow speed

The- most efficient method of compressing air is to compress it_________________?


aisothermally

✓


badiabatically

✖


cisentropically

✖


disochronically

✖


View Answer isothermally

Goto Page No.

Page 189 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