Engineering Mechanics

Chapter 15 : Equilibrium of Strings „„„„„ 341

OBJECTIVE TYPE QUESTIONS

1. If the shape of a string is parabola, it implies that it is subjected to

(a) uniformly distributed load (b) uniformly varying load

(c) point loads (d) none of these

2. The horizontal tension in a string is caused due to vertical loads.

(a) True (b) False

3. A string, supported at two different levels, is subjected to a uniformly distributed load per
   unit length of the span. The maximum tension in the string will be at
   (a) lower support (b) higher support
   (c) mid-point of the string (d) lowest point of the string


4. The length of a string supported at the same level is given by the relation

(a)

2

3

yc

l

l

+ (b)

8 2

3

yc

l

l

+

(c)

yc^2

l

l

+ (d)

2

3

yc

l

l

+

where l = Span of the cable, and

yc = Central dip of the cable.

5. A string falls in the form of a catenary, if it

(a) carries no weight (b) carries uniformly distributed load

(c) is supported at the same level (d) is supported at different levels

ANSWERS

1. (a) 2. (a) 3. (b) 4. (b) 5. (a)

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