MEC 107 MCQ 4

Mechanics test paper 4

31)   Which of the following is represented by the area under force-displacement diagram?

a. Impulse
b. Momentum
c. Power
d. Work done 

32)   According to work energy principle, a particle of mass m when subjected to unbalanced force system, the work done during displacement by all forces is equal to change in ____________ during displacement.

a. gravitational energy
b. kinetic energy 
c. mechanical energy
d. potential energy

33)   The force for which work done is independent of  _______ is called as conservative force.

a. distance
b. path 
c. time
d. all of the above

34)   A ball is dropped on a horizontal surface from a height of 15 m. What will be the rebounding height of the ball after striking the surface? (coefficient of restitution = 0.8)

a. 9.6 m 
b. 6.5 m
c. 5.6 m
d. Insufficient data

35)   What is the SI unit of linear momentum?

a. kg.m2 / sec
b. kg.m / sec 
c. N.sec2
d. N.m.sec

36)   Which of the following laws derive impulse moment principle?

a. Newton's 3rd law
b. Newton's 2nd law 
c. Newton's 1st law
d. All of the above

37)   Which of the following conditions should be satisfied for co-planer concurrent forces to be in equilibrium? 

a. Σ Fx = Σ Fy = 0 
b. Σ M = 0
c. Both a. and b.
d. None of the above

38)   If a body in equilibrium condition is acted by three forces at three points, then the line of action of these forces should be _____

a. always concurrent
b. always parallel
c. concurrent or parallel 
d. none of the above

39)   According to Lami's theorem, a body is in equilibrium condition if each force among three ____________ are proportional to sine angle between other two.

a. coplanar, collinear forces
b. collinear, non-concurrent forces
c. coplanar, non-concurrent forces
d. coplanar, concurrent forces 

40)   If n > 2j – R, then the truss is called as _________.  
(n = number of joints, j = number of members, R = number of reaction components)

a. perfect truss
b. redundant truss
c. deficient truss
d. none of the above



<< Previous                                                       Next >>

Comments

Post a Comment

Popular posts from this blog

MEC 107 MCQ 1

Image
  Mechanics Practice set paper 1 1)   Forces passing through a common point are known as _____  a.  collinear forces b.  co-planer forces c.  concurrent forces  d.  none of the above 2)   Varignon's theorem is used to find ________ a.  direction of resultant force b.  location of resultant force  c.  magnitude of resultant force d.  nature of resultant force 3)   Couple is formed due to two ______ a.  like, parallel and non-collinear forces of same magnitude b.  like, perpendicular and collinear forces of different magnitude c.  unlike, parallel and non-collinear forces of same magnitude  d.  unlike, perpendicular and non-collinear forces of different magnitude 4)   Which of the following laminas do not have centroid at its geometrical centre? a.  Circle b.  Equilateral triangle ...
Read more

MEC 107 MCQ 3

Mechanics Pratice paper 3 21)   Which axial force is determined while analyzing a truss?  a.  compressive force b.  tensile force c.  both a. and b. d.  none of the above ANSWER: both a. and b. 22)   If a body is subjected to plastic impact, _______ a.  only kinetic energy is conserved b.  only momentum is conserved c.  both a. and b. d.  none of the above 23)   An object of 30 kg is moved with a velocity of 2 m/s on a horizontal smooth surface. What is the velocity of the block for 4 seconds if force of 40 N is applied on it in the direction of force? a.  2 m/s b.  4.6 m/s c.  7.33 m/s d.  9.33 m/s ANSWER: 7.33 m/s 24)   If two objects of 30 kg and 10 kg move with equal kinetic energy, then what is the ratio of magnitudes for linear momentum?  a.  √3 : 1 b.  1 : √3 ...
Read more