Graphic Statics Exam Practice - Set 07 - ObjectiveBooks

# Practice Test: Question Set - 07

1. The forces which meet at one point and have their lines of action in different planes are called
(A) Coplanar non-concurrent forces
(B) Non-coplanar concurrent forces
(C) Non-coplanar non-current forces
(D) Intersecting forces

2. A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
(A) 0.25
(B) 0.50
(C) 0.75
(D) 1.0

3. A system of coplanar forces acting on a rigid body can be reduced to
(A) One force only
(B) One couple only
(C) One force and one couple only
(D) None of the above

4. The reaction at the support D of the continuous beam ABCD, hinged at two points shown in below figure is

(A) 1.6 t ↑
(B) 1.6 t ↓
(C) 0.5 t ↑
(D) 0.5 t ↓

5. The Law of Polygon of Forces states that
(A) If a polygon representing the forces acting at point in a body is closed, the forces are in equilibrium
(B) If forces acting on a point can be represented in magnitude and direction by the sides of a polygon taken in order, then the resultant of the forces will be represented in magnitude and direction by the closing side of the polygon
(C) If forces acting on a point can be represented of a polygon taken in order, their sides of a polygon taken in order, their resultant will be represented in magnitude and direction by the closing side of the polygon, taken in opposite order
(D) If forces acting on a point can be represented in magnitude and direction by the sides of a polygon in order, the forces are in equilibrium

6. A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be
(A) 10 m/sec
(B) 15 m/sec
(C) 20 m/sec
(D) 25 m/sec

7. 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

8. Periodic time of body moving with simple harmonic motion, is
(A) Directly proportional to its angular velocity
(B) Directly proportional to the square of its angular velocity
(C) Inversely proportional to the square of its angular velocity
(D) Inversely proportional to its angular velocity

9. A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If ‘r’ is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be
(A) [r (Ï€ + 0.25)]/(Ï€ - 0.5)
(B) [r (Ï€ - 0.5)]/(Ï€ + 0.25)
(C) [r (Ï€ - 0.25)]/(Ï€ - 0.5)
(D) [r (Ï€ + 0.25)]/(Ï€ + 0.5)

10. A body A of mass 6.6 kg which is lying on a horizontal platform 4.5 m from its edge is connected to the end of a light string whose other end is supporting a body of mass 3.2 kg as shown in below figure. If the friction between the platform and the body A is 1/3, the acceleration is
(A) 0.5 m/sec2
(B) 0.75 m/sec2
(C) 1.00 m/sec2
(D) 1.25 m/sec2

11. Williot-Mohr diagram is used to determine deflection in
(A) Trusses only
(B) Beam only
(C) Rigid frames only
(D) Any type of structure

12. A geo-stationary satellite is one which orbits the earth with a velocity of rotation of
(A) Moon
(B) Earth
(C) Sun
(D) Pole

13. The total time of collision and restitution of two bodies, is called
(A) Time of collision
(B) Period of collision
(C) Period of impact
(D) All the above

14. ‘P’ is the force acting on a body whose mass is ‘m’ and acceleration is ‘f’. The equation P - mf= 0, is known as
(A) Equation of dynamics
(B) Equation of dynamic equilibrium
(C) Equation of statics
(D) None of these

15. 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

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