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SSC JE 2019-20: Technical Quiz 76

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Question 1

For a rough pully with µs as friction coefficient

For this, =

Question 2

Which one of the following is not an air pollutant?

Question 3

Aerobic method of composting is also known as

Question 4

At a busy place in a city, the noise produced by the traffic varies from 60-70 dB, while the noise produced by the trains is in between 65-75 dB. Then the peak noise at that place will be

Question 5

The function of sluice valve provided in pipe line is

Question 6

The major pollutant that may cause damage to prestigious monument Taj Mahal is

Question 7

A flash mixer of 2 m³, with a velocity gradient of mixing mechanism equal to 400s^-1 and fluid absolute viscosity of 0.002 N-s/m² is continuously operated. What is the power input required?

Question 8

For a grit channel, if the recommendation flow velocity is 0.25 m/s and the detention period is 1.2 minute, then the length of tank is

Question 9

Two waste water streams A and B merge into each other producing a stream C with 5 times discharge than A. If the ultimate BOD value of stream A is 131.25 while B is fresh water. Find out the 5 day BOD of stream C (in mg/L) Use k = 0.23 day^-1

Question 10

A machine is put near a classroom which produces noise of 100 dB. If the machine is put twice the distance at present, then the percentage reduction in noise in the classroom is

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ESE & GATE CE General

Jun 8ESE & GATE CE