Objective Questions and Answers of Civil Engineering: Applied Mechanics 2

Subject: Applied Mechanics 2

**Part 2: Objective questions and answers of Applied Mechanics**

**Q1. A force p of 50 n and another force q of unknown magnitude act at 90° to each other.**

**They are balanced by a force of 130 n. The magnitude of q is**

a) 60 n

b) 80 n

c) 100 n

d) 120 n

**Q2. A rod ab carries three loads of 30 n, 70 n and 100 n at distances of 20 mm, 90 mm and 150 mm respectively from a. Neglecting the weight of the rod, the point at which the rod will balance is**

a) 109.5 mm from a

b) 119.5 mm from a

c) 125.5 mm from a

d) 132.5 mm from a

**Q3. When two forces, each equal to p, act at 90° to each other, then the resultant will be**

a) P

b) Pv^2

c) P/v2

d) 2p

**Q4. The resultant of two forces p and q is r. If q is doubled, the new resultant is perpendicular to p. Then,**

a) P = r

b) Q = r

c) P = q

d) None of the above is correct

**Q5. If the given forces p,, p2, p3 and p4 are such that the force polygon does not close, then the system will**

a) Be in equilibrium

b) Always reduce to a resultant force

c) Always reduce to a couple

d) Both (a) and (c)

**Q6. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?**

a) Howe truss

b) King post truss

c) Fink truss

d) Warren truss

**Q7. A cube on a smooth horizontal surface**

a) Cannot be in stable equilibrium

b) Cannot be in neutral equilibrium

c) Cannot be in unstable equilibrium

d) Can be in any of these states

**Q8. The following is in unstable equilibrium**

a) A uniform solid cone resting on a generator on a smooth horizontal Plane

b) A uniform solid cone resting on its base on a horizontal plane

c) A solid cube resting on one edge

d) A satellite encircling the earth

**Q9. A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable?**

a) Pyramid

b) Prism

c) Both equally stable

d) None of the above

**Q10. Minimum potential energy of a system will be in the position of**

a) Stable equilibrium

b) Unstable equilibrium

c) Neutral equilibrium

d) All of the above

** **

**Q11. Which of the following represents the state of neutral equilibrium?**

a) A cube resting on one edge

b) A smooth cylinder lying on a curved surface

c) A smooth cylinder lying on a convex surface

d) None of the above

**Q12. The bending moment in an arch is proportional to**

a) Vertical ordinate of funicular polygon

b) Vertical ordinate of the arch

c) Intercept between the arch axis and the funicular polygon

d) None of these

**Q13. An ordinate in a funicular polygon represents**

a) Shear force

b) Resultant force

c) Bending moment

d) Equilibrium

**Q14. The numbers of funicular polygons which can be drawn to pass through two specified points in the space diagram are**

a) Zero

b) 1

c) 2

d) Infinity

**Q15. The total kinetic energy of a hoop of mass 2 kg and radius 4 m sliding with linear velocity 8 m/sec and angular velocity 5 radian/sec is**

a) 64 j

b) 400 j

c) 464 j

d) 89 j

**Q16. The angular speed of a car while taking a circular turn of radius 100m at 36 km/hour, is **

a) 0.1 radian/sec

b) 1 radian/sec

c) 100 radian/sec

d) 1000 radian/sec

**Q17. The ratio of the speed of a rolling cylinder to the speed of sliding cylinder is**

a) Less than 1

b) Equal to 1

c) Between 1 and 2

d) Greater than 2

**Q18. Williot-mohr diagram is used to determine deflection in**

a) Trusses only

b) Beam only

c) Rigid frames only

d) Any type of structure

**Q19. A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its center of mass has a speed of 200 mm/sec, the work required to stop the hoop is**

a) 2 j

b) 4 j

c) 6 j

d) 8 j

**Q20. A solid sphere of mass m and radius r rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is**

a) (1/3) g sin0

b) (2/5) g sin 0

c) (3/7) g sin 0

d) (5/7) g sin0

Where g is acceleration due to gravity

**Part 2: Objective questions and answers of Applied Mechanics**

Q1. Answer d

Q2. Answer a

Q3. Answer b

Q4. Answer b

Q5. Answer b

Q6. Answer c

Q7. Answer d

Q8. Answer c

Q9. Answer a

Q10. Answer a

Q11. Answer d

Q12. Answer c

Q13. Answer c

Q14. Answer c

Q15. Answer c

Q16. Answer a

Q17. Answer a

Q18. Answer a

Q19. Answer b

Q20. Answer d