Chemical Engineering Mcqs

The upper layer of atmosphere is called the ____________________?

• (A)  Stratosphere
• (B)  Troposphere
• (C)  Ionosphere
• (D)  None of these

Answer

Submitted By :Ali Uppal

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

• (A)  102
• (B)  105
• (C)  109
• (D)  1015

Answer

Submitted By :Ali Uppal

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

• (A)  20
• (B)  230
• (C)  750
• (D)  1500

Answer

Submitted By :Ali Uppal

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

• (A)  105
• (B)  135
• (C)  160
• (D)  185

Answer

Submitted By :Ali Uppal

Disinfection of water is done to remove ______________________?

• (A)  Color
• (B)  Bad taste
• (C)  Foul odour
• (D)  Bacteria

Answer

Submitted By :Ali Uppal

In water treatment plant, zeolite process is used to remove the _____________ of water?

• (A)  Acidity
• (B)  Alkalinity
• (C)  Hardness
• (D)  Iron & zinc

Answer

Submitted By :Ali Uppal

Salt content in sea water is about ______________ percent?

• (A)  0.5
• (B)  1
• (C)  3.5
• (D)  9.05

Answer

Submitted By :Ali Uppal

______________ is the process of killing organism in water ?

• (A)  Coagulation
• (B)  Sterilisation
• (C)  Disinfection
• (D)  Sedimentation

Answer

Submitted By :Ali Uppal

Fresh sewage is ______________ in nature?

• (A)  Acidic
• (B)  Neutral
• (C)  Alkaline
• (D)  Highly acidic

Answer

Submitted By :Ali Uppal

From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?

• (A)  5
• (B)  50
• (C)  500
• (D)  5000

Answer

Submitted By :Ali Uppal