Test: Environmental Engineering- 1


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10 Questions MCQ Test GATE Civil Engineering (CE) 2023 Mock Test Series | Test: Environmental Engineering- 1

Test: Environmental Engineering- 1 for Civil Engineering (CE) 2022 is part of GATE Civil Engineering (CE) 2023 Mock Test Series preparation. The Test: Environmental Engineering- 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Environmental Engineering- 1 MCQs are made for Civil Engineering (CE) 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Environmental Engineering- 1 below.
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Test: Environmental Engineering- 1 - Question 1

1 TCU is equivalent to the color produced by

Detailed Solution for Test: Environmental Engineering- 1 - Question 1

TCU represent the true colour unit. It is a unit to represent colour impurities in water. 1 TCU is equivalent to the colour produced by 1 mg/L of platinum in form of chloroplatinate ion.

Test: Environmental Engineering- 1 - Question 2

As per IS 10500:2012, the total concentration of manganese (as Mn) and iron (as Fe) for drinking water purpose shall not exceed 

Detailed Solution for Test: Environmental Engineering- 1 - Question 2

As per IS10500:2012, the total concentration of manganese (as Mn) and iron (as Fe) for drinking water purpose shall not exceed 0.3 mg/L.

Test: Environmental Engineering- 1 - Question 3

Answer using the codes given below the list:-

Detailed Solution for Test: Environmental Engineering- 1 - Question 3

1) Measurement suspended solid is done by a gravimetric test involving the mass of residual measurement.

2) Measurement of Turbidity: -

A) Based on absorption principles

i) Turbidity Rod

ii) Jackson’s Turbidity meter

iii) Baylis Turbidimeter

B) Based on the scattering principle

i) Modern Nephelometer

3) Through Nessler’s tubes on Burgess scale, true colour is measured.

Test: Environmental Engineering- 1 - Question 4

The total domestic water demand for average Indian people is:

Detailed Solution for Test: Environmental Engineering- 1 - Question 4

Test: Environmental Engineering- 1 - Question 5

Two samples of water form two different sources are collected to measure pH value and it was found to be 6.2 and 6.8. How many times the first sample is more acidic than the second sample?

Detailed Solution for Test: Environmental Engineering- 1 - Question 5

Concept:-

pH = -log10 [H+]

-log10 [H+] = pH

[H+] = 10 -pH

Calculation

[H+]I = 10-6.2

[H+]II = 10-6.8

Hence, first sample is 4 times acidic than second sample.

Test: Environmental Engineering- 1 - Question 6

Match the following:-

Detailed Solution for Test: Environmental Engineering- 1 - Question 6

Free Ammonia – indicate recent pollution

Nitrate – indicate old pollution (fully oxidized)

Nitrite – indicate partly decomposed condition

Organic – indicate quantity of nitrogen before decomposition started.

Test: Environmental Engineering- 1 - Question 7

A water sample analysis produces alkalinity and total hardness of 200 mg/L and 250 mg/L as CaCO3 respectively. The carbonate and non-carbonate hardness (as CaCO3) will respectively be

Detailed Solution for Test: Environmental Engineering- 1 - Question 7

Concept:

Carbonate hardness = minimum of {Alkalinity, Total Hardness}

Total hardness = Carbonate Hardness + Non-carbonate Hardness.

Calculation:

Carbonate Hardness= minimum of {200 mg/L , 250 mg/L}

Carbonate Hardness = 200 mg/L as CaCO3

Non-Carbonate Hardness = Total Hardness – Carbonate Hardness

= 250 – 200

= 50 mg/L ​as CaCO3

Test: Environmental Engineering- 1 - Question 8

The fire demand for a city of 150000 population by using Kuichling’s formula is

Detailed Solution for Test: Environmental Engineering- 1 - Question 8

Concept:

Calculating fire Demand:

a) Kuchling’s formula

Q = 3182 √p

Where, Q = Amount of water required in liter/minute.

P = Population in Thousand

b) Freeman’s formula: -


Where, Q = Amount of water required in liter/minute.

P = Population in Thousand

c) National Bard of fire under writer formula:-

i. For central congested High valued city

→ when population ≤ 2 lakhs

Q = 4637 √ p [1 – 0.01 √p]

Where, Q = Amount of water required in liter/minute.

P = Population in Thousand

→ when population > 2 lakhs.

Provision of 54000 liters/minute may be made with an extra additional provision of 9100 to 36000 liter/minute for a second fire.

ii) for residential Buildings

→ Small or low building = 2200 l/min

→ Larger or higher building = 4500 l/min

→ High valued residency = (7650 – 13500) l/min

→ Three story building

 In densely built up area = up to 27000 l/min

d) Buston’s Formula: -

Q = 5663√ p

Calculation: -

According to Kuchling’s formula the fire demand is

Q = 3182 √P

Q = 3182 √150 L/min

Q = 38971.38 L/min

Q = 56.12 MLD ~ 57 MLD

Test: Environmental Engineering- 1 - Question 9

Match List – I (Estimated method) with List – II (Corresponding indicator) and select the correct answer using the codes given below the lists:

Detailed Solution for Test: Environmental Engineering- 1 - Question 9

Test: Environmental Engineering- 1 - Question 10

Which one of the following related to domestic potable water quality is CORRECT?

Detailed Solution for Test: Environmental Engineering- 1 - Question 10

Hardness (expressed as Ca CO 3 equivalent) is 75-115 ppm or mg/lit

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