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EE06

Environmental Engineering | MCQ – 06 | 20 MCQs

Posted on September 21, 2021March 8, 2023 By Civil Vedant

Q.1) In case of laying gullies, siphons, intercepting traps, the cost includes –

A) Setting and Laying

B) Bed concreting

C) Connection to drains

D) All of the above

Answer

Option (D)

Q.2) Which of the following represents the value of hourly variation factor?

A) 1.2

B) 1.5

C) 1.7

D) 2.5

Answer

Option (B)

Q.3) For construction use at a village site, the local pond water must be –

A) Sieved

B) Boiled and filtered

C) Mixed with jaggery

D) Treated with chlorine

Answer

Option (D)

Q.4) The % of chlorine in fresh bleaching powder is about –

A) 10 – 20

B) 20 – 25

C) 30 – 35

D) 40 – 50

Answer

Option (C)

Q.5) Nitrates more than 45mg/l in water lead to disease called –

A) Gastroenteritis

B) Mottled teeth

C) Polio

D) Blue Baby disease

Answer

Option (D)

Q.6) Hardness of water is caused by the presence of the following in water :

A) Chlorides and Sulphate

B) Calcium and Magnesium

C) Nitrites and Nitrates

D) Sodium and Potassium

Answer

Option (B)

Q.7) The valve which protects the water meter from the damages of water hammer –

A) Pressure relief valve

B) Stop cock

C) Reflux valve

D) Water hammer valve

Answer

Option (A)

Q.8) The measure of absorption or scattering of light by the suspended materials present in the water is known as –

A) Alkalinity

B) Color

C) Hardness

D) Turbidity

Answer

Option (D)

Q.9) Which of the following is the result of disinfection of water?

A) Complete grits

B) Killing of bacteria

C) Reducing turbidity upto zero

D) Improve pH values

Answer

Option (B)

Q.10) The minimum diameter of an opening of a manhole should be –

A) 25 cm

B) 50 cm

C) 75 cm

D) 105 cm

Answer

Option (A)

Q.11) The pH value of fresh-sewage is usually –

A) < 7

B) > 7

C) = 7

D) Equal to zero

Answer

Option (B)

Q.12) BOD test is conducted at a temperature of –

A) Ambient temperature

B) 150 C

C) 200 C

D) 270 C

Answer

Option (B)

Q.13) Which type of system will collect the rainwater?

A) Primary

B) Secondary

C) Tertiary

D) Primary and Tertiary

Answer

Option (A)

Q.14) Primary treatment of sewage consist of :

A) Removal of floating materials

B) Removal of sand and grit

C) Removal of organic materials

D) All of the above

Answer

Option (D)

Q.15) The main gas liberated from an anaerobic sludge digestor is :A) NH3B) COC) CO2D) CH4
Answer

Option (D)

Q.16) Anaerobic treatment is best suited for –

A) High efficiency

B) Toxic wastes

C) Dilute inorganic wastes

D) Strong organic wastes

Answer

Option (D)

Q.17) The minimum width of septic tank is taken –

A) 70 cm

B) 75 cm

C) 80 cm

D) 90 cm

Answer

Option (B)

Q.18) Before discharging the foul sewage into rivers, it is generally treated by –

A) Screening

B) Sedimentation

C) Oxidation

D) All of the above

Answer

Option (A)

Q.19) The most efficient method to conserve energy in the form of oil and gases is –

A) Combustion

B) Fluidized-bed incineration

C) Incineration with heat recovery

D) Pyrolysis

Answer

Option (C)

Q.20) Which of the following emission is the primary reason for the depletion of the ozone layer?

A) CO2

B) CFCs

C) CO

D) NO2

Answer

Option (B)

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Environment Engg. Tags:civil engineering mcqs, environment engg objectives, environmental engg mcqs

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