Related Questions

A manhole is generally provided at each
A Bend
B Junction
C Change of gradient
D All the above
A drop manhole is provided if
A A sewer drops from a height
B A branch sewer joins the main sewer at higher level
C A lamp is inserted to check obstruction
D None of these
The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in
A aqueduct and syphon aqueduct
B aqueduct and super passage
C super passage and canal syphon
D level crossing
A manhole is classified as shallow if its depth is between
A 0.4 to 0.5 m
B 0.5 to 0.7 m
C 0.7 to 0.9 m
D 0.9 to 1.20 m
If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains
A Hydrogen sulphide
B Carbon dioxide
C Methane
D Oxygen
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of
A Carbondioxide gas
B Hydrogen sulphide gas
C Methane gas
D Petrol vapours
Lead acetate test in sewer manhole is done to test the presence of
A Methane gas
B Hydrogen sulphide
C Carbondioxide gas
D Diesel vapours
Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
A Ductility
B Impact strength
C Machinability
D Melting point
A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.
A Dry dock
B Wet dock
C Floating dock
D Refuge dock
When a canal and a drainage approach each other at the same level, the structure so provided, is
A An aqueduct
B A syphon
C A level crossing
D Inlet and outlet

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