Questions and answers for exam Preparation

MCQs

Total Questions : 1033 | Page 102 of 104 pages

Question 1011. The weight of a body is due to

gravitational force of attraction towards the centre of the earth.
gravitational pull exerted by the earth
centripetal force of earth
force of attraction experienced by par-ticles

Discuss Question

Answer: Option A. -> gravitational force of attraction towards the centre of the earth.

Question 1012. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

circle
hyperbola
parabola
ellipse

Discuss Question

Answer: Option B. -> hyperbola

Question 1013. Which one of the following statements is not correct

the angle of repose is equal to angle of friction
the tangent of the angle of repose is equal to coefficient of friction
the tangent of the angle of friction is equal to coefficient of friction
the sine of the angle of repose is equal to coefficient to friction

Discuss Question

Answer: Option D. -> the sine of the angle of repose is equal to coefficient to friction

Question 1014. According to Lami's theorem

Three forces acting at a point will be in equilibrium
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
Three forces acting at a point can be represented by a triangle, each side being proportional to force

Discuss Question

Answer: Option B. -> If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Question 1015. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

metal will float in water
density of metal can’t be determined
metal is twice as dense as water
metal is twice as dense as unknown fluid

Discuss Question

Answer: Option B. -> density of metal can’t be determined

Question 1016. Coulomb friction is the friction between

solids and liquids
two dry surfaces
bodies having relative motion
two lubricated surfaces

Discuss Question

Answer: Option C. -> bodies having relative motion

Question 1017. A single force and a couple acting in the same plane upon a rigid body

produce moment of a couple
cannot balance each other
balance each other
are equivalent

Discuss Question

Answer: Option B. -> cannot balance each other

Question 1018. Center of gravity of a solid cone lies on the axis at the height

one-fourth of the total height above base
three-eighth of the total height above the base
one-half of the total height above base
one-third of the total height above base

Discuss Question

Answer: Option A. -> one-fourth of the total height above base

Question 1019. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be