Related Questions

The inspection pit or chamber is a manhole provided in a base drainage system
A At every change of direction
B At every change of gradient
C At every 30 m intervals
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
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 special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?
A 18
B 38
C 48 
D 28
Pure oxide refractories are generally monocrystaliine in nature and are self bonded __________ bricks are generally used as moderator in nuclear reactors.
A Beryllia
B Carborundum
C Corundum
D Thoria
In a transformer the tappings are generally provided on
A Primary side
B Secondary side
C Low voltage side
D Can be connected to any side

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