Chemical Engineering MCQs

Page No. 284

Which of the following accounts for maximum energy loss in a boiler ?


aFlue gases


bAsh content in the fuel


cIncomplete combustion


dUnburnt carbon in flue gases


View Answer Flue gases

Naphthalene is used for making_________________?


aInsecticides (e.g. moth balls)


bUnsaturated polyesters


cDrug intermediates e.g. β-naphthol


dAll A., B. and C.


View Answer All A., B. and C.

Dry air requirement for burning 1 Nm3 of CO to CO2 may be around _______________ Nm3 ?


a2.4


b1.75


c0.87


d11.4


View Answer 2.4

In flue gas analysis by Orsat’s apparatus, oxygen is absorbed by____________________?


aPotassium hydroxide


bCuprous chloride


cAlkaline pyrogallol solution


dNone of these



Blast furnace coke is made from coal by_____________________?


aLow temperature carbonisation


bHigh temperature carbonisation


cMedium temperature carbonisation


dHeating the coal in an oven in presence of air



For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will_____________________?


aIncrease


bDecrease


cIncrease or decrease depending on the fuel type


dNot change


View Answer Decrease

Low temperature carbonisation of coal produces_________________?


aMetallurgical coke


bSoft coke


cVery low calorific value coke oven gas


dNo by-products


View Answer Soft coke

Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around ______________ cm/hr?


a2.5


b0.5


c10


d20


View Answer 2.5

A coal having higher volatile matter content will necessarily have lower____________________?


aAsh fusion temperature


bCalorific value


cIgnition temperature


dCaking index


View Answer Ignition temperature

Function of secondary air in pulverised coal firing is to_________________?


aTransport the coal to the burner


bDry the coal


cEnsure efficient burning of coal around the burner


dReduce primary air requirement



Goto Page No.

Page 284 of 843

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