applied mechanics and graphic statics MCQs – Page 2

Practise focused applied mechanics and graphic statics questions with marked answers for exam preparation and subject revision.

applied mechanics and graphic statics Mcqs
21. The resultant of two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then_________________?
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A. Q = R

B. P = R

C. None of the above is correct

D. P = Q

22. A 2 m long ladder rests against a wall and makes an angle of 30 with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ?
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A. 1.0 m above the floor

B. 1.732 m from the wall

C. 1.0 in from the wall

D. 1.732 m above the floor </strong>

E. correct answer is?

23. In SI units, the units of force and energy are respectively___________________?
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A. kg-wt and joule

B. Newton and joule

C. Newton and watt

D. Dyne and erg

24. Intrinisic equation of catenary is given by____________________?
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A. S = C sin cp

B. S = C cot <p

C. S = C tan q>

D. S = C cos cp

25. A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a_____________________?
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A. catenary

B. cycloid

C. parabola

D. ellipse

26. A system of copianar forces is in equilibrium when___________________?
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A. force polygon closes

B. funicular polygon closes

C. both force polygon and funicular polygon close

D. all the forces are concurrent

27. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is__________________?
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A. unpredictable

B. zero

C. minimum

D. maximum
28. The angles between two forces to make their resultant a minimum and a maximum respectively are__________________?
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A. 90 and 180

B. 0 and 90

C. 180 and 0

D. 180 and 90

29. The condition of equilibrium for any system of forces in a plane is____________________?
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A. that polygon of forces must close

B. that resultant couple must be zero

C. both (A) and (B)

D. none of the above

30. The ratio of kinetic energy and potential energy of a simple harmonic oscillator, at a displacement equal to half its amplitude is given by__________________?
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A. 1:02

B. 3:1

C. 1:01

D. 2:01

31. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is_____________________?
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A. 60

B. 80

C. 50

D. 30

32. The following is in unstable equilibrium__________________?
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A. a solid cube resting on one edge

B. a uniform solid cone resting on its base on a horizontal plane

C. a uniform solid cone resting on a generator on a smooth horizontal plane

D. a satellite encircling the earth

33. The pole distance is measured in___________________?
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A. time scale

B. distance scale

C. force scale

D. mass scale

34. A particle is dropped from a height of 3 m on a horizontal floor, which has a coefficient of restitution with the ball of 1/2. The height to which the ball will rebound after striking the floor is____________________?
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A. 1.5 m

B. 0.5 m

C. 1.0 m

D. 0.75 m
35. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if________________?
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A. floor is smooth and wall is rough

B. floor is rough and wall is rough

C. both floor and wall are rough

D. both floor and wall are smooth

36. The dimensions of power are_______________?
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A. ML-T*

B. ML2T2

C. MLr2

D. MLT3
37. If y is force and x is velocity, then dimensions of =r are dx2__________________?
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A. ML-T1

B. M^T

C. M2LT3

D. ML-T0
38. The condilion for a lifting machine to be reversible is that its efficiency should be_________________?
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A. more than 66.67%

B. equal to 100%

C. less than 50%

D. more than 50%
39. Coefficient of friction depends on__________________?
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A. nature of surfaces only

B. area of contact only

C. both (A) and (B)

D. none of the above

40. Select the correct statement ?
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A. The body centrode rolls on the space centrode

B. The space centrode rolls on the body centrode

C. Both body and space centrodes may role on each other

D. The body centrode never touches space centrode