Related Questions

An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains
A Hydrogen sulphide
B Carbon dioxide
C Methane
D Oxygen
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
In R.C. sewer pipes, the percentage longitudinal reinforcement to the cross-sectional area of concrete is kept
A 10.0
B 5.0
C 2.0
D 0.25
Sewer pipes need be checked for
A Minimum flow
B Maximum flow
C Both A and B
D None of these
Sewer pipes are made of
A Earthen ware
B Stone ware
C Refractory clay
D All the above
The sewer pipes
A Carry sewage as gravity conduits
B Are designed for generating self-cleansing velocities at different discharge
C Should resist the wear and tear caused due to abrasion
D All the above
Which one of the following tests is used for testing sewer pipes?
A Water test
B Ball test
C Mirror test
D All of these
Organisms which are predominantly found living on, in or near bed sediments of rivers or lakes are known as
A nektonic
B neuston
C benthic
D planktonic
If the original day sediments are subjected to high temperature and pressure, they successively change into rocks, the correct order of which is ________
A Slate, Shale, Schist
B Shale, Schist, Slate
C Slate, Schist, Shale
D Shale, Slate, Schist

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