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49.

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

A.	front face only	B.	inner face only
C.	both front face and inner face	D.	none of the above

50.

In a pile of length /, the points of suspen¬sion from ends for lifting it are located at

A.	0.207 1	B.	0.25 /
C.	0.293 /	D.	0.333 /

51.

In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

A.	zero	B.	tensile
C.	compressive	D.	tensile or compressive

52.

In a spherical dome the hoop stress due to a concentrated load at crown is

A.	compressive everywhere	B.	tensile everywhere
C.	partly compressive and partly tensile	D.	zero

53.

In case of hand mixing of concrete, the extra cement to be added is

A.	5%	B.	10%
C.	15%	D.	20%

54.

In counterfort retaining walls, the main reinforcement in the stem at support is

A.	not provided	B.	provided only on inner face
C.	provided only on front face	D.	provided both on inner and front faces

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