Mechanical Engineering MCQs

Page No. 103

If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?


afree expansion

✖


bhyperbolic expansion

✖


cadiabatic expansion

✖


dthrottling

✓


View Answer throttling

If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?


afree expansion

✓


bhyperbolic expansion

✖


cadiabatic expansion

✖


dparabolic expansion

✖


View Answer free expansion

Which of the following processes is irreversible process___________________?


aisothermal

✖


badiabatic

✖


cthrottling

✓


dall of the above

✖


View Answer throttling

For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?


azero

✓


bminimum

✖


cmaximum

✖


dinfinity

✖


View Answer zero

Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be ____________________?


a4.17m3/kgmol

✓


b400 m3/kg mol

✖


c0.15 m3/kg mol

✖


d41.7 m3/kg mol

✖


View Answer 4.17m3/kgmol

The more effective way of increasing efficiency of Carnot engine is to____________________?


aincrease higher temperature

✖


bdecrease higher temperature

✖


cincrease lower temperature

✖


ddecrease lower temperature

✓



For reversible adiabatic process, change in entropy is_________________?


amaximum

✖


bminimum

✖


czero

✓


dunpredictable

✖


View Answer zero

According to first law of thermodynamics__________________?


awork done by a system is equal to heat transferred by the system

✖


btotal internal energy of a system during a process remains constant

✖


cinternal energy, enthalpy and entropy during a process remain constant

✖


dtotal energy of a system remains constant

✓



First law of thermodynamics furnishes the relationship between______________________?


aheat and work

✖


bheat, work and properties of the system

✓


cvarious properties of the system

✖


dvarious thermodynamic processes

✖



In an isothermal process, the internal energy________________?


aincreases

✖


bdecreases

✖


cremains constant

✓


dfirst increases and then decreases

✖


View Answer remains constant

Goto Page No.

Page 103 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