1. The bending moment diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, will be ?

a horizontal line

a vertical line

an inclined line

a parabolic curve

Answer: a parabolic curve

Explanation:


2. The bending moment on a section is maximum where shear force is ?

minimum

maximum

changing sign

zero

Answer: changing sign

Explanation:


3. A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then ?

bolt and tube are under tension

bolt and tube are under compression

bolt is under compression and tube is under tension

bolt is under tension and tube is under compression

Answer: bolt is under tension and tube is under compression

Explanation:


4. Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as ?

linear strain

lateral strain

volumetric strain

shear strain

Answer: lateral strain

Explanation:


5. When a rectangular beam is loaded transversely, the maximum compressive stress is developed on the ?

top layer

bottom layer

neutral axis

every cross-section

Answer: bottom layer

Explanation:


6. A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then ?

rod is under compression

tube is under compression

both rod and tube are under compression

tube is under tension and rod is under compression

Answer: both rod and tube are under compression

Explanation:


7. Which of the following statement is correct ?

The stress is the pressure per unit area

The strain is expressed in mm

Hook's law holds good upto the breaking point

Stress is directly proportional to strain within elastic limit.

Answer: Stress is directly proportional to strain within elastic limit.

Explanation:


8. The point of contra flexure is a point where ?

shear force changes sign

bending moment changes sign

shear force is maximum

bending moment is maximum

Answer: bending moment changes sign

Explanation:


9. The Poisson's ratio for cast iron varies from ?

0.23 to 0.27

0.25 to 0.33

0.31 to 0.34

0.32 to 0.42

Answer: 0.25 to 0.33

Explanation:


10. A localised compressive stress at the area of contact between two members is known as ?

tensile stress

bending stress

crushing stress

shear stress

Answer: crushing stress

Explanation: