SECTION-4

#### Strength of Material MCQ

##### Q71. A fixed beam of length (l) carries a point load (W) at the centre. The deflection at the centre is

(a) same as for a simply supported beam
(b) half of the deflection for a simply supported beam
(c) one-fourth of the deflection for a simply supported beam
(d) double the deflection for a simply supported beam.

Ans:(c) one-fourth of the deflection for a simply supported beam

(a) is one
(b) are two
(c) are three
(d) is none.

Ans:(b) are two

##### Q73. A fixed beam of length (l) carries a point load (W) at the centre, the points of contra-flexure lies at

(a) the fixed ends
(b) the middle of the beam
(c) 1/4from the ends
(d) none of the above.

Ans:(c) 1/4from the ends

##### Q74.A fixed beam of length (l) carries a point load (W) at the centre, the bending moment at the centre is

(a) same as for a simply supported beam
(b) half of the bending moment for a simply supported beam
(c) one-fourth of the bending moment for a simply supported beam
(d) double the bending moment for a simply supported beam.

Ans:(b) half of the bending moment for a simply supported beam

(a) zero
(b) Wl /4
(c)  Wl /8
(d)  Wl /2

Ans:(c)  Wl /8

(a) D/8
(b) D/4
(c)  D/3
(d)  D/2

Ans:(b) D/4

##### Q77. Three beams of circular, square, rectangular (with depth twice the width) sections and of same length are subjected to the same maximum bending moment. If allowable stress is the same then the section which will require maximum weight of the same material will be

(a) rectangular
(b) square
(c) circular
(d) none of the above.

Ans:(c) circular

##### Q78. Three beams of circular, square, rectangular (with depth twice the width) sections and of same length are subjected to the same maximum bending moment, the section which will require minimum weight of the same material will be

(a) rectangular
(b) square
(c) circular
(d) none of the above.

Ans:(a) rectangular

##### Q79.Three beams of circular, square, rectangular (with depth twice the width) sections and of same length are subjected to the same maximum bending moment, the ratios of weight of circular beam, weight of rectangular beam and weight of square beam is

(a) 1 : 0.7938 : 1.118
(b) 07938 : 1 : 1.118
(c) 1.118 : 07938 : 1
(d) 07938 : 1118 : 1.

Ans:(c) 1.118 : 07938 : 1

##### Q80. A short column of external diameter 40 cm and internal diameter 20 cm carries an eccentric load 10000 N. The maximum eccentricity which the load can have without producing tension on the cross-section is

(a) 10 cm
(b) 8 cm
(c) 7.5 cm
(d) 6.25 cm.

Ans:(d) 6.25 cm.

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##### Read More Sections of Strength of Material

Each section contains maximum 80 Questions. To practice more questions visit other sections.

Strength of Material MCQ – Section-1

Strength of Material MCQ – Section-2

Strength of Material MCQ – Section-3

Strength of Material MCQ – Section-4

Strength of Material MCQ – Section-5

Strength of Material MCQ – Section-6