Environmental Engineering

81.In the context of the chemical process industries, the term BOD is normally associated with the

1. Characterisation of solid wastes
2. Organic concentration in gaseous effluents
3. Characterisation of liquid effluents
4. Characterisation of boiler feed water

View answer

82.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.)

1. t = 15 - 0.0065h
2. t = 15 + 0.0065h
3. t = 0.0035h -15
4. t = 15 - 0.0035h

View answer

83.In water treatment plant, zeolite process is used to remove the _________ of water.

1. Acidity
2. Alkalinity
3. Hardness
4. Iron&zinc

View answer

84.In water treatment, alum [Al2(SO4)3] is used for the process of

1. Filtration
2. Coagulation
3. Sedimentation
4. Disinfection

View answer

85.Industrial workers working in leather tanning&manufacturing units are prone to suffer from

1. Respiratory ailments (e.g. bronchitis)
2. Skin diseases (e.g. dermatitis)
3. Silicosis
4. Blurred vision

View answer

86.Infective bacteria in water is killed by the _________ process.

1. Sterilisation
2. Aeration
3. Disinfection
4. None of these

View answer

87.Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes

1. Blood poisoning
2. Anaemia
3. Nervous system disorder
4. All (A), (B)&(C)

View answer

88.Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes

1. Blood poisoning
2. Anaemia
3. Nervous system disorder
4. All (A), (B) and (C)

View answer

89.Inhalation of silica dust by human being causes

1. Asphyxiation
2. Shortness of breath
3. Tuberculosis
4. Both (B)&(C)

View answer

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

1. Asphyxiation (suffocation)
2. Shortness of breath
3. Tuberculosis
4. All (A), (B) and (C)

View answer