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WorksheetsCivil mock Brush Up
Total questions: 20
Worksheet time: 6mins
Forces are called coplanar when all of them acting on body lie in
one point
one plane
different plane
perpendicular plane
The above figure shows the three coplanar forces P, Q and R acting at a point O. If these forces are in equilibrium, then
P/sin β = Q/sin α = R/sin ɣ
P/sin α = Q/sin β = R/sin ɣ
P/sin ɣ = Q/sin α = R/sin β
P/sin α = Q/sin ɣ = R/sin β
Whenever a force acts on a body and the body undergoes a displacement, then
Work is said to be done
Power is being transmitted
Body has kinetic energy of translation
None of these
According to Lami’s theorem
The three forces must be equal
The three forces must be at 120° to each other
The three forces must be in equilibrium
If the three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two
The forces, which meet at one point and their lines of action also lie on the same plane, are known as
Coplanar concurrent forces
Coplanar non-concurrent forces
Non-coplanar concurrent forces
Non-coplanar non-concurrent forces
Which of the following is not a vector quantity?
Weight
Velocity
Acceleration
Force
For any system of coplanar forces, the condition of equilibrium is that the
Algebraic sum of the horizontal components of all the forces should be zero
Algebraic sum of the vertical components of all the forces should be zero
Algebraic sum of moments of all the forces about any point should be zero
All of the above
Non-coplanar non-concurrent forces are those forces which
Meet at one point, but their lines of action do not lie on the same plane
Do not meet at one point and their lines of action do not lie on the same plane
Do not meet at one point but their lines of action lie on the same plane
None of the above
The weight of a body is due to
Gravitational pull exerted by the earth
Forces experienced by body in atmosphere
Force of attraction experienced by particles
Gravitational force of attraction towards the centre of the earth
According to principle of moments
if a system of coplanar forces is in equilibrium, then their algebraic sum is zero
if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is
zero
the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same
point
positive and negative couples can be balanced
Effect of force on a body depends on
Direction
Position
Magnitude
All of the above
Couple means two forces acting parallel
Equal in magnitude and in same direction
Not equal in magnitude but in same direction
Equal in magnitude and opposite in direction
None of the above
maximum and minimum resultant of two concurrent forces 20 kN and 12kN are
40 kN & 24 kN
32 kN & 8 kN
10kN & 6kN
None of these
Resultant of two unlike parallel forces 10kN and 15kN is
25kN
5kN
150kN
12.5kN
An object which has only mass but no size
continuum
point force
particle
rigid body
Geotechnical Engineering is the branch which deals with the study of
water
soil
air
all of the above
moment of a force about a point is the measure of its
Rotational effect
Translational effect
Irrrotational effect
None of these
the method to resolve a single force into two mutual perpendicular direction is called
composition of forces
resolution of forces
moment
All of the above
Resultant of two forces as shown in fig is
1000kN
1400kN
1100kN
1200kN
Free body diagram means
diagram with forces
diagram freed from contact surfaces
diagram freed from contact surfaces showing forces and reaction
diagram freed from contact surfaces showing only reaction
