MEC 107 MCQ 7

Mechanics Practice paper 5


 41)   Identify the type of truss shown below.

Types-of-deficient-truss.png
a. Deficient truss 
b. Perfect truss
c. Redundant truss
d. All of the above

42)   Which of the following statements is false about frame/truss?

a. Bent member is never used in a truss
b. Internal hinges are used to connect members in a truss 
c. All members in the truss are two force members
d. Multiforce members can be used in a frame

43)   Which motion has magnitude of static frictional force directly proportional to normal reaction?

a. Actual motion
b. Impending motion 
c. Both a. and b.
d. None of the above

44)   Which formula is used to calculate angle of static friction (Φs)?

a. tan-1 μs 
b. sin-1 μs
c. cos-1 μs
d. none of the above

45)   Frictional force depends on ________

a. surface area in contact
b. roughness of surface 
c. both a. and b.
d. none of the above


46)   Which of the following conditions do not change the effect of couple?

a. Shifting of couple to a new position in its plane
b. Shifting of couple to a parallel plane
c. Rotation of couple in its plane
d. All of the above 
47)   What are the X and Y components of point P for the force system shown below?

Force-system-for-given-point.png
a. X = 186.00 N, Y = 464 N
b. X = 464.23 N, Y = 185 N 
c. X = 466.12 N, Y = -180 N
d. None of the above

48)   If two concurrent forces A and B acting on a point are 200 N and 300 N. What is the magnitude of resultant force, if it makes an angle of 50o with each force?

a. 471.08 N
b. 455.12 N 
c. 400.56 N
d. Insufficient data

49)   What is the angle made by side of a square lamina, if it is freely suspended from a corner with the horizontal? 

a. 0o
b. 45o 
c. 90o
d. 180o
50)   What is the C.G of an isosceles triangle of base 20 cm and side 40?

a. 12.90 cm 
b. 13.28 cm
c. 19.36 cm
d. 38.72 cm

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