SECTION-3

## ENGINEERING MECHANICS MCQ

##### Q6. Concurrent forces are those forces whose lines of action(a) Lie on the same line(b) Meet at one point(c) Meet on the same plane(d) None of theseAns: (b) Meet at one pointQ7. The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)(a) P = mW – C(b) P = m/W + C(c) P = mW + C(d) P = C – mWAns: (c) P = mW + CQ8. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)(a) IP = IG + Ah2(b) IP = IG – Ah2(c) IP = IG / Ah2(d) IP = Ah2 / IGAns: (a) IP = IG + Ah2Q9. The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by(a) 2P sinθ/2(b) 2P cosθ/2(c) 2P tanθ/2(d) 2P cotθ/2Ans: (b) 2P cosθ/2Q10. The wheels of a moving car possess(a) Potential energy only(b) Kinetic energy of translation only(c) Kinetic energy of rotation only(d) Kinetic energy of translation and rotation bothAns: (d) Kinetic energy of translation and rotation both

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##### Read More Sections of Engineering Mechanics

Each section contains maximum 80 Questions. To practice more questions visit other sections.

Engineering Mechanics Objective Questions – Section-1

Engineering Mechanics Objective Questions – Section-2

Engineering Mechanics Objective Questions – Section-3

Engineering Mechanics Objective Questions – Section-4