MCQs of Engineering mechanics For SSC JE examination
Q1.. Which of the following statement is correct? (a) A force is an agent which produces or tends to produce motion * (b) A force is an agent which stops or tends to stop motion. (c) A force may balance a given number of forces acting on a body . (d) Both (a) and (b).
Q2.In order to determine the effects of a force acting on a body, we must know (a) Its magnitude and direction of the line along which it acts (b) Its nature (whether push or pull) (c) Point through which it acts on the body. (d) All of the above.
. Answer : D
Q3.lf a number of forces are acting simultaneously on a particle, then the resultant of these forces will have the same effect as produced by the all the forces. This is known as * (a) Principle of physical independence of forces. . (b) Principle of transmissibility of forces. (c) Principle of resolution of forces. (d) None of the above.
Q4.The vector method, for the resultant force, is also called polygon law of forces . (a) Correct (b) Incorrect
Answer : B
Q5.The resultant of two forces P and Q acting at an angle is equal to "(a)sqrt (P2 + Q2 + 2PQsin ) . (c) sqrt(P2 02-2PQsin ) (d) sqrt(P2 + Q2 2PQcose)
Q6.The moment of a force about any point is geometrically equal to... area of the triangle whose base is the line representing the force and vertex is the point about which the moment is taken. . (a) Half (b) Same (c) Twice (d) None of these
Q7.In a clockwise moment, we actually use wall clock in order to know the time for which * the moment is applied. . (a) Right (b) Wrong
Q10.ln a compound lever, the leverages of all the simple levers is (a) Added (b) Subtracted (c) Multiplied (d) Divided
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