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Civil Engineering Objective Questions { Hydrology }



106.  Cast iron pipes
A. are widely used in city water supplies
B. resist corrosion satisfactorily
C. may last for 100 years
D. all the above.

107.  Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following :
A.300
B.400
C.500
D.550

108.  The least thickness of class B cast iron (spun)pipe, is
A. 7.2 mm
B. 7.9 mm
C. 8.6 mm
D. 10 mm.

109.  The maximum pressure to which cast iron pipes may be subjected to, is
A. 3 kg/cm2
B. 5 kg/cm2
C. 7 kg/cm2
D. 10 kg/cm2.

110.  The type of joint generally used in cast iron pipes, is
A. socket and spigot joint
B. flanged joint
C. dresser coupling joint
D. all the above.

111.  At the socket and spigot joint,
A. enlarged end of the pipe is called socket
B. normal end of the pipe is called spigot
C. spigot is fitted into the socket
D. all the above.

112.  The joint used for joining the plain ends of cast iron pipes, is
A. flanged joint
B. socket and spigot joint
C. dresser coupling joint
D. flexible joint

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