Mechanical Engineering MCQs

Page No. 8

Secondary air is the used to_________________?


aprovide air around burners for obtaining optimum combustion


btransport and dry the coal


cconvert CO (formed in lower zone of furnace) into C02 at higher zone


dair delivered by induced draft fan



Water and sediment in fuel oil can be removed by _______________________?


aheating the oil in the settling tanks


bcooling the oil in the settling tanks


cburning the oil


dsuspension



Presence of moisture in fuel oil would____________________?


akeep the burner tips cool


baid in proper combustion


ccause sputtering, possibly extinguish¬ing flame


dclean the nozzles



Primary air is the air used to__________________?


aprovide air around burners for obtaining optimum combustion


btransport and dry the coal


cconvert CO (formed in lower zone of furnace) into C02 at higher zone


dair-delivered by forced draft fan



02 content in atmospheric air on volume basis is___________________?


a21%


b23%


c30%


d40%


View Answer 21%

The economizer is used in boilers to _______________________?


aincrease thermal efficiency of boiler


beconomise on fuel


cextract heat from the exhaust flue gases


dincrease flue gas temperature



For combustion of a fuel, following is essential_____________________?


acorrect fuel air ratio


bproper ignition temperature


c02 to support combustion


dall the three above


View Answer all the three above

Bomb calorimeter is used to determine ___________________?


aHigher calorific value at constant volume


bLower calorific value at constant volume ,


cHigher calorific value at constant pressure


dLower calorific value at constant pressure



Proximate analysis of fuel is determination of percentage of ____________________?


acarbon, hydrogen, nitrogen, sulphur, moisture


bfixed carbon, ash, volatile matter, moisture


chigher calorific value


dlower calorific value



Reheating of steam under ideal conditions takes place at constant __________________?


aentropy


benthaply


cpressure


dtemperature


View Answer temperature

Goto Page No.

Page 8 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