Related Questions

Drop manholes are the manholes
A Without entry ladders
B Without manhole covers
C With depths more than 3.5 m
D Having drains at different levels
Sewer manholes are generally provided at
A The change of gradient
B The change of direction
C The junctions of sewers
D All of these
The major axis of elliptical manholes on the shell should be provided
A Longitudinally
B Circumferentially
C On dished end
D Anywhere
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
A Nozzle or rim
B Flared out
C Fluid in
D Ring plate
The function of manholes provided in the shell of a distillation column is to
A Keep a check on the liquid gradient over the plate by direct visual observation
B Give access to the individual trays for cleaning, maintenance and installation
C Guard against foaming & entrainment by dumping antifoaming agent through it
D All of the above
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
For large sewers, maximum distance between manholes may be
A 50 m
B 100 m
C 200 m
D 300 m
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called
A Inverted syphon
B Depressed sewer
C Sag pipe
D all of these
In case of sewer lines
A Water test is carried out to check water tightness of the joints
B Test for straightness is carried out with the help of a lamp and mirror
C Obstruction test is carried out with the help of smooth ball of diameter 13 mm
D All the above
The trap which is provided to disconnect the house drain from the street sewer is called
A Master trap
B Intercepting trap
C Interception manhole
D All the above

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