Strength Of Materials(Engineering > Mechanical Engineering ) Questions and Answers
Question 1. A body of weight w on inclined plane of a being pulled up by a horizontal force p will be on the point of motion up the plane when p is equal to
W
W sin (a + $)
Wtan(a +
Wan(a-)
Explanation:-
Answer: Option C. -> Wtan(a +
Question 2. In the lever of third order, load w, effort p and fulcrum f are oriented as follows
W between P and F
F between W and P
P between W and F
W, P and F all on one side
Explanation:-
Answer: Option A. -> W between P and F
Question 3. The c.g. of a plane lamina will not be at its geometrical centre in the case of a
right angled triangle
equilateral triangle
square
circle
Explanation:-
Answer: Option A. -> right angled triangle
Question 4. The unit of work or energy in s.i. units is
newton
pascal
watt
joule.
Explanation:-
Answer: Option D. -> joule.
Question 5. A force is completely defined when we specify
magnitude
direction
point of application
all of the above
Explanation:-
Answer: Option D. -> all of the above
Question 6. Which of the following is not the unit of power ?
kW (kilowatt)
hp (horse power)
kg m/sec
kcal/kg sec.
Explanation:-
Answer: Option D. -> kcal/kg sec.
Question 7. 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
ellipse
hyperbola
parabola
circle
Explanation:-
Answer: Option B. -> hyperbola
Question 8. 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
density of metal can’t be determined
metal is twice as dense as water
metal will float in water
metal is twice as dense as unknown fluid
Explanation:-
Answer: Option A. -> density of metal can’t be determined
Question 9. Coulomb friction is the friction between
bodies having relative motion
two dry surfaces
two lubricated surfaces
solids and liquids
Explanation:-
Answer: Option A. -> bodies having relative motion
Question 10. In ideal machines
mechanical advantage is greater than velocity ratio
mechanical advantage is equal to velocity ratio
mechanical advantage is less than velocity ratio
mechanical advantage is unity
Explanation:-
Answer: Option B. -> mechanical advantage is equal to velocity ratio