Engineering - Civil Enginnering

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7.

The property of metal which allows it to deform continuously at slow rate without any further increase in stress is known as                        


A. fatigue B. creep
C. plasticity D. resilience




8.

A beam ABC rests on simple supports at A and B with BC as an overhang. D is centre of span AB. If in the first case a concentrated load P acts at C while in the second case load P acts at D, then the                        


A. deflection at D in the first case will be equal to the deflection at C in the second case B. deflection at C in the first case is equal to the deflection at D in the second case
C. deflection at D in the first case will always be smaller than the deflection at C in the second case D. deflection at D in the first case will always be greater than the deflection at C in the second case




9.

A beam of overall length / rests on two simple supports with equal overhangs on both sides. Two equal loads act at the free ends. If the deflection at the centre of the beam is the same as at either end, then the length of either overhang is                        


A. 0 152 1 B. 0.207 1
C. 0.252 1 D. 0.277 1




10.

A beam of overall length 1 with equal overhangs on both sides carries a uniformly distributed load over the entire length. To have numerically equal bending moments at centre of the beam and at supports, the distance between the supports should be                        


A. 0.2771 B. 0.403 1
C. 0.5861 D. 0.7071




11.

A beam of square cross-section with side 100 mm is placed with one diagonal vertical. If the shear force acting on the section is 10 kN, the maximum shear stress is                        


A. 1 N/mm2 B. 1.125 N/mm2
C. 2 N/mm2 D. 2.25 N/mm2




12.

A beam of triangular cross section is placed with its base horizontal. The maximum shear stress intensity in the section will be                        


A. at the neutral axis B. at the base
C. above the neutral axis D. below the neutral axis




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