Chemical Environmental Engineering

White smoke coming out of the chimney of a furnace indicates the use of_________________?

Byadmin March 11, 2019August 29, 2021

White smoke coming out of the chimney of a furnace indicates the use of_________________?

A. Low excess air
B. Very high excess air
C. Gaseous fuel in the furnace
D. Liquid fuel in the furnace

Chemical Environmental Engineering

During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

A. Filtration
B. Digestion
C. Sedimentation
D. Both B. and C.

Read More During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?
Chemical Environmental Engineering

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

A. Hydrogen
B. Carbon dioxide
C. Ozone
D. None of these

Read More A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?
Chemical Environmental Engineering

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

A. 35
B. 75
C. 95
D. 105

Read More Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?
Chemical Environmental Engineering

TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?

TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?

A. 5
B. 100
C. 1000
D. 2000

Read More TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?
Chemical Environmental Engineering

Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?

Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?

A. Asphyxiation (suffocation)
B. Shortness of breath
C. Tuberculosis
D. All A., B. and C.

Read More Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?
Chemical Environmental Engineering

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?

In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?

A. t = 15 – 0.0065h
B. t = 15 + 0.0065h
C. t = 0.0035h -15
D. t = 15 – 0.0035h

Read More In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?

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