Engineering :: Strength of Materials

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301.

In order to avoid sliding of masonry dam, the force of friction between the dam and soil should be at least

A.	equal to	B.	1.5 times
C.	double	D.	2.5 times

302.

In order to prevent crushing of masonry at the base of the dam, the maximum stress should be

A.	equal to	B.	less than
C.	more than

303.

The Rankine's theory for active earth pressure is based on the assumption that

A.	the retained material is homogeneous and cohesionless	B.	the frictional resistance between the retaining wall and the retained material is neglected
C.	the failure of the retained material takes place along a plane called rupture plane	D.	all of the above

304.

A reinforced cement concrete beam is considered to be made of

A.	homogeneous material	B.	hetrogeneous material
C.	composite material	D.	isotropic material

305.

The steel bars in a reinforced cement concrete beam are embedded

A.	in the centre	B.	near the bottom
C.	near the top	D.	at any position

306.

The assumption made in the theory of the reinforced cement concrete beam is that

A.	all the tensile stresses are taken up by the steel reinforcement only	B.	there is a sufficient bond between steel and concrete
C.	the steel and concrete are stressed within its elastic limit	D.	all of the above

307.

The critical neutral axis of a reinforced cement concrete beam is based on the principle that the neutral axis is situated at the centre of gravity of a given section.

True

False

308.

The actual neutral axis of a reinforced cement concrete beam is based on the principle that the moment of areas of compression and tension zones at the neutral axis are equal.

Agree

Disagree

309.

In case of an under-reinforced beam, the depth of actual neutral axis is

A.	same as	B.	less than
C.	greater than

310.

In case of an over-reinforced beam, the depth of actual neutral axis is the same as that of the critical neutral axis.

True

False