Strength of Materials Multiple Choice Questions
Strength of Materials
The weight of a body is due to
A.  centripetal force of earth 

B.  gravitational pull exerted by the earth 

C.  force of attraction experienced by particles 

D.  gravitational force of attraction towards the centre of the earth. 
The product of either force of couple with the arm of the couple is called
A.  resultant couple 

B.  moment of the forces 

C.  resulting couple 

D.  moment of the couple 
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
A.  density of metal can’t be determined 

B.  metal is twice as dense as water 

C.  metal will float in water 

D.  metal is twice as dense as unknown fluid 
Coulomb friction is the friction between
A.  bodies having relative motion 

B.  two dry surfaces 

C.  two lubricated surfaces 

D.  solids and liquids 
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
A.  ellipse 

B.  hyperbola 

C.  parabola 

D.  circle 