# Co-planer Forces - Mechanical Engineering (MCQ) questions and answers

1)   What is the angle made by force A with X and Y ?
(where X and Y are components of force A) a. 75.52o
b. 60.65o
c. 14.03o
d. 14.47o
 Answer  Explanation ANSWER: 75.52o Explanation: No explanation is available for this question!

2)   The maximum and minimum magnitude of resultant forces is 1000 N and 500 N at point. What are the values of two forces acting on it?

a. 500 N, 500 N
b. 450 N, 550 N
c. 300 N, 700 N
d. 250 N, 750 N
 Answer  Explanation ANSWER: 250 N, 750 N Explanation: No explanation is available for this question!

3)   Forces passing through a common point are known as _____

a. collinear forces
b. co-planer forces
c. concurrent forces
d. none of the above
 Answer  Explanation ANSWER: concurrent forces Explanation: No explanation is available for this question!

4)   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
 Answer  Explanation ANSWER: location of resultant force Explanation: No explanation is available for this question!

5)   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
 Answer  Explanation ANSWER: unlike, parallel and non-collinear forces of same magnitude Explanation: No explanation is available for this question!

6)   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
 Answer  Explanation ANSWER: All of the above Explanation: No explanation is available for this question!

7)   What are the X and Y components of point P for the force system shown below? 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
 Answer  Explanation ANSWER: X = 464.23 N, Y = 185 N Explanation: No explanation is available for this question!

8)   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
 Answer  Explanation ANSWER: 455.12 N Explanation: No explanation is available for this question!

9)   The method of splitting a single force into two perpendicular components along x-axis and y-axis is called as _____

a. orthogonal resolution
b. perpendicular resolution
c. both a. and b.
d. none of the above
 Answer  Explanation ANSWER: both a. and b. Explanation: No explanation is available for this question!

10)   Which of the following statements is false about forces/couple?

a. Moment of couple is free vector
b. Resultant and equilibrant are equal in magnitude and direction
c. Resultant of a couple is always zero
d. Parallelogram law is to be proved experimentally
 Answer  Explanation ANSWER: Resultant and equilibrant are equal in magnitude and direction Explanation: No explanation is available for this question!