Related Questions

A swimming pool is initially filled to a depth of 96 inches. After 2 weeks, the depth has decreased to9212 inches. Assuming that the depth decreased at a constant rate, after how many days would the water depth have reached 9334 inches?
A 3
B 9
C 7
D 6
A foundation is called shallow if its depth, is
A One-fourth of its width
B Half of its width
C Three-fourth of its width
D Equal to its width
The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
A Plutonic rocks
B Hypabyssal rocks
C Volcanic rocks
D Igneous rocks
A manhole is generally provided at each
A Bend
B Junction
C Change of gradient
D All the above
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
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 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 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

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