Chemical Environmental Engineering

The widest explosive limit is of _____________, thereby making it the most explosive gas?

Byadmin March 11, 2019August 29, 2021

The widest explosive limit is of _____________, thereby making it the most explosive gas?

A. Acetylene
B. Petrol vapor
C. Hydrogen
D. Carbon monoxide

Chemical Environmental Engineering

Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

A. 22
B. 42
C. 332
D. 1050

Read More Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?
Chemical Environmental Engineering

Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________________?

Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________________?

A. Inversely proportional to viscosity of gas
B. Proportional to the viscosity & density of the gas
C. Proportional to the pressure of the gas
D. Both B. and C.

Read More Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________________?
Chemical Environmental Engineering

Iron & manganese present in the polluted water is removed by __________________?

Iron & manganese present in the polluted water is removed by __________________?

A. Simple filtration
B. Oxidation followed by settling & filtration
C. Chemical coagulation
D. Chlorination only

Read More Iron & manganese present in the polluted water is removed by __________________?
Chemical Environmental Engineering

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

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

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

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

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

A. 1 to 2
B. 4 to 5
C. 9 to 10
D. 15 to 20

Read More In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?
Chemical Environmental Engineering

Ionisation potential employed in the industrial electrostatic precipitator is of the order of_______________?

Ionisation potential employed in the industrial electrostatic precipitator is of the order of_______________?

A. 30 to 70 kV DC
B. 30 to 70 kV AC
C. 230 V AC
D. 230 V DC

Read More Ionisation potential employed in the industrial electrostatic precipitator is of the order of_______________?

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