Mechanical Engineering MCQs

Page No. 95

At low temperatures (say 75°C) the notched-bar impact value of steel____________________?


aincreases markedly

✖


bdecreases markedly

✓


cremains same

✖


ddepends on heat treatment carried out

✖


View Answer decreases markedly

For steel, the ultimate strength in shear as compared to ultimate strength in tension is ___________________?


asame

✖


b1/2

✖


c1/3

✖


d2/3

✓


View Answer 2/3

Resistance to fatigue of a material is measured by________________?


aYoung’s modulus

✖


bcoefficient of elasticity

✖


celastic limit

✖


dendurance limit

✓


View Answer endurance limit

The ratio of endurance limit in shear to the endurance limit in flexure is__________________________?


a0.33

✖


b0.4

✖


c0.5

✖


d0.55

✓


View Answer 0.55

Residual stress in materials_________________?


aacts when external load is applied

✖


bbecomes zero when external load is removed

✖


cis independent of external loads

✓


dis always harmful

✖



Cold working________________?


aincreases the fatigue strength

✓


bdecreases the fatigue strength

✖


chas no influence on fatigue strength

✖


dalone has no influence on fatigue strength

✖



In nitrated parts, the origins of the fatigue cracks will occur at__________________?


asurface

✖


bjust below the surface

✖


cwithin the core

✖


dnone of the above

✓


View Answer none of the above

Which process will increase the fatigue duration of parts ?


afinishing and polishing

✖


bshot-peening

✓


cdecarburisation

✖


delectroplating

✖


View Answer shot-peening

The building up of worn and uridersized parts, subjected to repeated loads by electroplating is_____________________?


abest method

✓


bextremely hazardous

✖


chas no effect as regards fatigue strength

✖


dcheapest method

✖


View Answer best method

Yield point in fatigue loading as compared to static loading is__________________?


asame

✖


bhigher

✖


clower

✓


ddepends on other factors

✖


View Answer lower

Goto Page No.

Page 95 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