Engineering Mechanics Quiz practies questions test1

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1. The unit of force in S.I. units is _____.
kilogram	newton
watt	dyne

2. The unit of work or energy in S.I. units is _____.
newton	pascal
kilogram metre	joule

3. The unit of power in S.I. units is _____.
newton metre	watt
joule	kilogram metre/sec

4. Forces are called concurrent when their lines of action meet in _____.
one point	two points
plane	perpendicular planes

5. Forces are called coplanar when all of them acting on body lie in _____.
one point	one plane
different planes	perpendicular planes

6. A force acting on a body may ______.
introduce internal stresses	balance the other forces acting on it
retard its motion	all of the above

7. Which is the correct statement about law of polygon of forces ?
if any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium	if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
if a polygon representing forces acting at a point is closed then forces are in equilibrium	if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

8. Effect of a force on a body depends upon
magnitude	direction
position or line of action	all of the above

9. If a number of forces act simultaneously on a particle, it is possible ______.
not a replace them by a single force	to replace them by a single force
to replace them by a single force through C.G.	to replace them by a couple

10. A force is completely defined when we specify ______.
magnitude	direction
point of application	all of the above

11. If two equal forces of magnitude P act at an angle 9°, their resultant will be ______.
P/2 cos 9/2	IP sin 9/2
2P tan 9/2	IP cos 9/2

12. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of _____.
forces	independence of forces
dependence of forces	resolution of forces

13. The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to ____.
the algebraic sum of the resolved parts of the forces in the given direction	the sum of the resolved parts of the forces in the given direction
the difference of the forces multiplied by the cosine of 9	the sum of the forces multiplied by the sine of 9

14. Which of the following do not have identical dimensions ?
Momentum and impulse	Torque and energy
Torque and work	Moment of a force and angular momentum

15. Which of the following is not the unit of distance ?
angstrom	light year
micron	milestone

16. Which of the following is not the unit of power ?
kW (kilowatt)	hp (horse power)
kcal/sec	kcal/kg sec

17. Which of the following is not the unit of work, energy and heat ?
kcal	kg m
kWhr	hp

18. Which of the following is not the unit of pressure ?
kg/cm	ata
atmosphere	newton

19. The weight of a body is due to _____.
centripetal force of earth	gravitational pull exerted by the earth
forces experienced by body in atmos-phere	gravitational force of attraction towards the centre of the earth

20. The forces, which meet at one point, but their lines of action do not lie in a plane, are called _____.
coplanar non-concurrent forces	non-coplanar concurrent forces
non-coplanar non-concurrent forces	intersecting forces

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