Chemical Engineering MCQs

Page No. 62

Insufficient washing of sand grains in a rapid sand filter causes__________________?


aAir binding

✖


bShrinkage of filtering media

✖


cMud balls

✓


dExpansion of filtering media

✖


View Answer Mud balls

In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?


a1 to 2

✖


b4 to 5

✓


c 9 to 10

✖


d15 to 20

✖


View Answer 4 to 5

Exposure to SO2 containing chimney gases results in the__________________?


aReduction in strength of leather & cloth

✖


b Acceleration of corrosion rates of metals

✖


cIncreased drying & hardening time of paints

✖


dAll A., B. and C.

✓


View Answer All A., B. and C.

Higher concentration of nitrogen dioxide in atmospheric air causes___________________?


aCancer

✖


bBronchitis

✓


cAsphyxiation

✖


dCorrosion

✖


View Answer Bronchitis

Which is the most widely used coagulant for the treatment of turbid water ?


aAlum (aluminium sulphate)

✓


bLime

✖


cFerric chloride

✖


dSodium aluminate

✖



A man exposed to excessive noise level in the working environment may suffer from____________________?


aHearing loss

✖


bRupture of ear drum

✖


cNervousness & fatigue`

✖


d All A., B. & C.

✓


View Answer All A., B. & C.

5-200 μm size particles are called__________________?


aColloids or aerosols

✓


bPowder

✖


cDust

✖


dSmoke

✖


View Answer Colloids or aerosols

Lagoons used for purification of polluted water_______________?


aAre large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds

✖


b Use micro-organisms/bacteria in presence of dissolved oxygen

✖


cGives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre

✖


d All A., B. & C.

✓


View Answer All A., B. & C.

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?


a Sedimentation tank

✖


bCircular clarifier

✖


cMechanical flocculation

✖


dChemical coagulation

✓


View Answer Chemical coagulation

The most commonly used chemical coagulant in water treatment is________________?


aFerrous sulphate

✖


bAlum

✓


cLime

✖


d Hydrazine

✖


View Answer Alum

Goto Page No.

Page 62 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