1
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

The purpose of biological treatment of sewage is to __________ .

A

reduce its BOD

B

increase its BOD

C

reduce sedimentation

D

increase sedimentation

2
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Noise can cause the following EXCEPT __________.

A

sleeplessness

B

decreased heartbeat

C

altered breathing pattern

D

psychological stress

3
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

'Algal bloom' mainly includes _________ .

A

red algae

B

green algae

C

brown algae

D

blue-green algae

4
MHT CET (PCB) 2025 9th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

    The quantity of CO and hydrocarbons in the exhaust of a motor vehicle can be reduced by installing ____________ in it.

    i. a scrubber

    ii. an electrostatic precipitator

    iii. a catalytic converter

    Select the correct option:

A

iii only

B

ii and iii

C

i only

D

i and ii

MHT CET (Biology) Subjects

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