Mechanical Engineering MCQs

Page No. 56

The top piston ring nearer to the piston crown is known as_____________________?


acompression ring


boil ring


cscrapper ring


dgroove ring


View Answer compression ring

Piston rings are usually made of___________________?


acast iron


baluminium


cphosphor bronze


dbabbitt


View Answer cast iron

Which is false statement about advantages of V-type engine_________________?


acompact design requiring lesser space


bimproved distribution of air to cylinder


ccasting less liable to distortion


dless overhead clearance



Detonation is caused by the following unstable compounds______________________?


aperoxides, aldehydes and ketones


bperoxides, aldehydes, oxides and sul-phides


caldehydes, oxides and ketones


dketones and sulphur compounds



The function of a fuel pump in a petrol pump is to______________________?


ainject fuel in cylinder


bsupply fuel when carburettor fails


cpump fuel so that it reaches carburettor (to improve thermal efficiency)


ddoes not exist



The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?


ahigher


blower


csame


ddepends on size of engine


View Answer lower

The spark plug gap is normally maintained at________________?


a0.1 to 0.2 mm


b0.2 to 0.4 mm


c0.45 to 0.6 mm


d0.6 to 0.8 mm


View Answer 0.45 to 0.6 mm

The delay period in petrol engine is of the order of__________________?


a0.001 sec


b0.002 see


c0.01 sec


d0.05 sec


View Answer 0.002 see

Auto-ignition temperature is____________________?


aminimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame


btemperature at which it solidifies or congeals


cthat at which it catches fire without external aid


dindicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off



Petrol is distilled at a temperature in range of__________________?


a30 – 65°C


b65 – 220°C


c220-350°C


d350-450°C


View Answer 65 – 220°C

Goto Page No.

Page 56 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