Strength of Materials Test Questions - Set 6

1)   A cylindrical section having no joint is known as ____________________?

a. jointless section
b. homogeneous section
c. perfect section
d. manufactured section
e. seamless section
Answer  Explanation 

ANSWER: seamless section

Explanation:
No explanation is available for this question!


2)   The safe twisting moment for a compound shaft is equal to the _________________?

a. maximum calculated value
b. minimum calculated value
c. mean value
d. extreme value
e. none of the above
Answer  Explanation 

ANSWER: minimum calculated value

Explanation:
No explanation is available for this question!


3)   The value of shear stress which is induced in the shaft due to the applied couple varies____________________?

a. from maximum at the center to zero at the circumference
b. from zero at the center to maximum at the circumference
c. from maximum at the center to mini-mum at the cricumference
d. from minimum at the centro to maxi-mum at the circumference
e. none of the above
Answer  Explanation 

ANSWER: from zero at the center to maximum at the circumference

Explanation:
No explanation is available for this question!


4)   In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be____________________?

a. increase key length
b. increase key depth
c. increase key width
d. double all the dimensions
e. none of the above
Answer  Explanation 

ANSWER: increase key width

Explanation:
No explanation is available for this question!


5)   If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella ________________________?

a. more inclined when moving
b. less inclined when moving
c. more inclined when standing
d. less inclined when standing
e. none of the above
Answer  Explanation 

ANSWER: less inclined when standing

Explanation:
No explanation is available for this question!


6)   Dynamic friction as compared to static friction is __________________?

a. same
b. more
c. less
d. may be less of more depending on nature of surfaces and velocity
e. has no correlation
Answer  Explanation 

ANSWER: less

Explanation:
No explanation is available for this question!


7)   The algebraic sum of moments of the forces forming couple about any point in their plane is__________________?

a. equal to the moment of the couple
b. constant
c. both of above are correct
d. both of above are wrong
e. none of the above
Answer  Explanation 

ANSWER: equal to the moment of the couple

Explanation:
No explanation is available for this question!


8)   If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?

a. meet in a point
b. be all parallel
c. at least two of them must meet
d. all the above are correct
e. none of the above
Answer  Explanation 

ANSWER: all the above are correct

Explanation:
No explanation is available for this question!


9)   The co-efficient of friction depends upon _________________?

a. nature of surfaces
b. area of contact
c. shape of the surfaces
d. all of the above
e. A. and B. above
Answer  Explanation 

ANSWER: nature of surfaces

Explanation:
No explanation is available for this question!


10)   Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one_______________?

a. ellipse
b. hyperbola
c. parabola
d. circle
e. none of the above
Answer  Explanation 

ANSWER: hyperbola

Explanation:
No explanation is available for this question!


11)   A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal__________________?

a. density of metal can’t be determined
b. metal is twice as dense as water
c. metal will float in water
d. metal is twice as dense as unknown fluid
e. none of the above
Answer  Explanation 

ANSWER: density of metal can’t be determined

Explanation:
No explanation is available for this question!


12)   The C.G. of a plane lamina will not be at its geometrical centre in the case of a __________________?

a. right angled triangle
b. equilateral triangle
c. square
d. circle
e. rectangle
Answer  Explanation 

ANSWER: right angled triangle

Explanation:
No explanation is available for this question!


13)   The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?

a. same
b. double
c. half
d. four times
e. one fourth
Answer  Explanation 

ANSWER: double

Explanation:
No explanation is available for this question!


14)   The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of __________________?

a. friction
b. limiting friction
c. repose
d. kinematic friction
e. static friction
Answer  Explanation 

ANSWER: repose

Explanation:
No explanation is available for this question!


15)   A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?

a. 38 m
b. 62.5 m
c. 96 m
d. 124 m
e. 240 m
Answer  Explanation 

ANSWER: 62.5 m

Explanation:
No explanation is available for this question!


16)   In actual machines_____________________?

a. mechanical advantage is greater than velocity ratio
b. mechanical advantage is equal to velocity ratio
c. mechanical advantage is less than velocity ratio
d. mechanical advantage is unity
e. none of the above
Answer  Explanation 

ANSWER: mechanical advantage is less than velocity ratio

Explanation:
No explanation is available for this question!


17)   A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?

a. straight line
b. parabola
c. hyperbola
d. elliptical
e. part of a circle
Answer  Explanation 

ANSWER: parabola

Explanation:
No explanation is available for this question!


18)   Which of the following is the example of lever of first order__________________?

a. arm of man
b. pair of scissors
c. pair of clinical tongs
d. all of the above
e. none of the above
Answer  Explanation 

ANSWER: all of the above

Explanation:
No explanation is available for this question!


19)   The C.G. of a right circular solid cone of height h lies at the following distance from the base________________?

a. h/2
b. J/3
c. h/6
d. h/4
e. 3/i/5
Answer  Explanation 

ANSWER: h/4

Explanation:
No explanation is available for this question!


20)   The C.G. of a solid hemisphere lies on the central radius 3r_________________?

a. at distance — from the plane base 3r
b. at distance — from the plane base 3r
c. at distance — from the plane base 3r
d. at distance — from the plane base or
e. at distance — from the plane base
Answer  Explanation 

ANSWER: at distance — from the plane base or

Explanation:
No explanation is available for this question!