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
Drop manholes at the junctions of sewer lines, are provided if
A Invert level of a branch sewer is more than 60 cm that of the main sewer
B Sewer line runs along a main road
C Ordinary manhole cannot be built
D Two sewer lines intersect
The major axis of elliptical manholes on the shell should be provided
A Longitudinally
B Circumferentially
C On dished end
D Anywhere
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
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
Large diameter sewers subjected to external pressure alone, are reinforced
A Near the inner surface of the pipe
B Near the outer surface of the pipe
C Both A and B
D With elliptical cage
The minimum and maximum diameters of sewers shall preferably be
A 15 cm and 100 cm
B 15 cm and 300 cm
C 30 cm and 450 cm
D 60 cm and 300 cm
The maximum diameter of sewers adopted in the designs is
A 1.0 m
B 2.0 m
C 3.0 m
D 4.0 m
Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause
A Explosion
B Non biodegradable foam
C Undesirable plant growth
D Corrosion

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