Chemical Environmental Engineering

Brown spots in fabrics will be caused by washing with water containing large amount of___________________?

Byadmin March 11, 2019August 29, 2021

Brown spots in fabrics will be caused by washing with water containing large amount of___________________?

A. Iron
B. Zinc
C. Iodine
D. Bromine

Chemical Environmental Engineering

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

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

A. Air binding
B. Shrinkage of filtering media
C. Mud balls
D. Expansion of filtering media

Read More Insufficient washing of sand grains in a rapid sand filter causes__________________?
Chemical Environmental Engineering

Which of the following is a green house gas other than CO2 ?

Which of the following is a green house gas other than CO2 ?

A. Methane
B. Nitrous oxide
C. Chlorofluoro carbons (CFC)
D. All A., B. and C.

Read More Which of the following is a green house gas other than CO2 ?
Chemical Environmental Engineering

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

A. 3
B. 30
C. 7
D. 70

Read More Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?
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 ?
Chemical Environmental Engineering

Carcinogenic air pollutants cause__________________?

Carcinogenic air pollutants cause__________________?

A. Bone decay
B. Cancer
C. Asphyxiation (suffocation)
D. Anemia

Read More Carcinogenic air pollutants cause__________________?
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_______________?