Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?

Byadmin March 11, 2019August 29, 2021

Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?

A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere

Chemical Environmental Engineering

Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?

Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?

A. Hydrogen sulphide
B. Mercury
C. Cadmium
D. Asbestos

Read More Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?
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

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?

A. 20
B. 60
C. 90
D. 120

Read More Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?
Chemical Environmental Engineering

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

A. Oxidation
B. Reduction
C. Dehydration
D. Fermentation

Read More Which of the following processes is involved in the biochemical treatment of sewage effluents ?
Chemical Environmental Engineering

Hydrogen ion concentration in distilled water is___________________?

Hydrogen ion concentration in distilled water is___________________?

A. 10-7
B. 7 × 10-7
C. 107
D. 7 × 107

Read More Hydrogen ion concentration in distilled water is___________________?
Chemical Environmental Engineering

Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

B. Cooling and freezing of water kills the bacteria present in it
C. With increasing boiler operating pressure of steam, the maximum allowable concentration of
silica in feed water goes on decreasing
D. Dissolved oxygen content in high pressure boiler feed water should be nil

Read More Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?

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