The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to__________________?

the sum of the resolved parts of the forces in the given direction

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

the sum of the forces multiplied by the tangent of 9

The forces, which meet at one point, but their lines of action do not lie in a plane, are called______________?

non-coplanar non-concurrent forces

The C.G. of a solid hemisphere lies on the central radius 3r_______________?

at distance — from the plane base

at distance — from the plane base 3r

at distance — from the plane base or

at distance — from the plane base

The center of gravity of a triangle lies at the point of__________________?

intersection of bisector of angles

The algebraic sum of moments of the forces forming couple about any point in their plane is________________?

equal to the moment of the couple

Pick up wrong statement about friction force for dry surfaces. Friction force is________________?

independent of the area of contact surfaces

proportional to normal load between the surfaces

dependent on the materials of contact surface

proportional to velocity of sliding

independent of the area of contact surfaces

none of the above is wrong statement

Pick up the incorrect statement from the following _______________?

The C-G. of an ellipse is at its center

The C.G. of a circle is at its center

The C.G. of a triangle is at the intersection of its medians

The C.G. of a rectangle is at the inter-section of its diagonals

The C.G. of a semicircle is at a distance of r/2 from the center

The C-G. of an ellipse is at its center

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?

perpendicular to the wall at its upper end

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?

towards the wall at its upper end

away from the wall at its upper end

Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?

at an angle equal to the angle of friction to the inclined plane

Kinetic friction is the________________?

tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction

ratio of limiting friction and normal reaction

the friction force acting when the body is just about to move

the friction force acting when the body is in motion

In the equation of virtual work, following force is neglected_______________?

reaction of any smooth surface with which the body is in contact

reaction of a rough surface of a body which rolls on it without slipping

reaction at a point or an axis, fixed in space, around which a body is con-strained to turn

In ideal machines________________?

mechanical advantage is less than velocity ratio

mechanical advantage is greater than velocity ratio

mechanical advantage is equal to velocity ratio

mechanical advantage is less than velocity ratio

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?

four members with unknown forces of the frame

two members with unknown forces of the frame

three members with unknown forces of the frame

four members with unknown forces of the frame

three members with known forces of the frame

four members with two known forces

In actual machines______________?

mechanical advantage is greater than velocity ratio

mechanical advantage is equal to velocity ratio

mechanical advantage is less than velocity ratio

If a rigid body is in equilibrium under the action of three forces, then_______________?

the lines of action of these forces meet in a point

the lines of action of these forces are parallel

If a number of forces act simultaneously on a particle, it is possible_________________?

to replace them by a single force through C.G.

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 and a force

Dynamic friction as compared to static friction is________________?

may be less of more depending on nature of surfaces and velocity

D’ Alembert’s principle is used for___________________?

determining stresses in the truss

reducing the problem of kinetics to equivalent statics problem

determining stresses in the truss

719 + Mcqs in Strength Of Materials in Civil Engineering Page 2 McqOptions

51.	The unit of power in S.I. units is______________?
A.	newton meter
B.	watt
C.	joule
D.	kilogram meter/sec
E.	pascal per sec
Answer» C. joule

Discussion

52.	The unit of force in S.I. units is_________________?
A.	kilogram
B.	newton
C.	watt
D.	dyne
E.	joule
Answer» C. watt

Discussion

53.	The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be_________________?
A.	20 kg, – ve sense
B.	20 kg, + ve sense
C.	10 kg, + ve sense
D.	10 kg, – ve sense
E.	45 kg, + ve sense
Answer» B. 20 kg, + ve sense

Discussion

54.	The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to__________________?
A.	the algebraic sum of the resolved parts of the forces in the given direction
B.	the sum of the resolved parts of the forces in the given direction
C.	the difference of the forces multiplied by the cosine of 9
D.	the sum of the forces multiplied by the sine of 9
E.	the sum of the forces multiplied by the tangent of 9
Answer» B. the sum of the resolved parts of the forces in the given direction

Discussion

55.	The ratio of limiting friction and normal reaction is known as_______________?
A.	coefficient of friction
B.	angle of friction
C.	angle of repose
D.	sliding friction
E.	friction resistance
Answer» B. angle of friction

Discussion

56.	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
E.	none of the above
Answer» E. none of the above

Discussion

57.	The possible loading in various members of framed structures are_______________?
A.	compression or tension
B.	buckling or shear
C.	shear or tension
D.	all of the above
E.	bending
Answer» B. buckling or shear

Discussion

58.	The necessary condition for forces to be in equilibrium is that these should be_______________?
A.	coplanar
B.	meet at one point ;
C.	both A. and B. above
D.	all be equal
E.	something else
Answer» D. all be equal

Discussion

59.	The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?
A.	same
B.	double
C.	half
D.	four times
E.	one fourth
Answer» C. half

Discussion

60.	The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?
A.	limiting friction
B.	sliding friction
C.	rolling friction
D.	kinematic friction
E.	dynamic friction
Answer» B. sliding friction

Discussion

61.	The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are____________________?
A.	2 and V6
B.	3 and 1 kg
C.	V5andV5
D.	2 and 5
E.	none of the above
Answer» D. 2 and 5

Discussion

62.	The forces, which meet at one point, but their lines of action do not lie in a plane, are called______________?
A.	coplanar non-concurrent forces
B.	non-coplanar concurrent forces
C.	non-coplanar non-concurrent forces
D.	intersecting forces
E.	none of the above
Answer» C. non-coplanar non-concurrent forces

Discussion

63.	The coefficient of friction depends on_________________?
A.	area of contact
B.	shape of surfaces
C.	strength of surfaces
D.	nature of surface
E.	all of the above
Answer» E. all of the above

Discussion

64.	The co-efficient of friction depends upon________________?
A.	nature of surfaces
B.	area of contact
C.	shape of the surfaces
D.	all of the above
E.	A. and B. above
Answer» B. area of contact

Discussion

65.	The C.G. of a solid hemisphere lies on the central radius 3r_______________?
A.	at distance — from the plane base 3r
B.	at distance — from the plane base 3r
C.	at distance — from the plane base 3r
D.	at distance — from the plane base or
E.	at distance — from the plane base
Answer» E. at distance — from the plane base

Discussion

66.	The C.G. of a right circular solid cone of height h lies at the following distance from the base_____________?
A.	h/2
B.	J/3
C.	h/6
D.	h/4
E.	3/i/5
Answer» E. 3/i/5

Discussion

67.	The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?
A.	right angled triangle
B.	equilateral triangle
C.	square
D.	circle
E.	rectangle
Answer» B. equilateral triangle

Discussion

68.	The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be______________?
A.	r/2
B.	2r/3
C.	r/A
D.	3r/2
E.	3r/A
Answer» E. 3r/A

Discussion

69.	The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?
A.	L/2
B.	L/3
C.	3L/4
D.	2L/3
E.	3L/8
Answer» E. 3L/8

Discussion

70.	The center of gravity of a uniform lamina lies at_______________?
A.	the center of heavy portion
B.	the bottom surface
C.	the mid point of its axis
D.	all of the above
E.	none of the above
Answer» D. all of the above

Discussion

71.	The center of gravity of a triangle lies at the point of__________________?
A.	concurrence of the medians
B.	intersection of its altitudes
C.	intersection of bisector of angles
D.	intersection of diagonals
E.	all of the above
Answer» B. intersection of its altitudes

Discussion

72.	The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of__________________?
A.	friction
B.	limiting friction
C.	repose
D.	kinematic friction
E.	static friction
Answer» D. kinematic friction

Discussion

73.	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__________________?
A.	forces
B.	independence of forces
C.	dependence of forces
D.	balance of force
E.	resolution of forces
Answer» F.

Discussion

74.	The algebraic sum of moments of the forces forming couple about any point in their plane is________________?
A.	equal to the moment of the couple
B.	constant
C.	both of above are correct
D.	both of above are wrong
E.	none of the above
Answer» B. constant

Discussion

75.	Pick up wrong statement about friction force for dry surfaces. Friction force is________________?
A.	proportional to normal load between the surfaces
B.	dependent on the materials of contact surface
C.	proportional to velocity of sliding
D.	independent of the area of contact surfaces
E.	none of the above is wrong statement
Answer» D. independent of the area of contact surfaces

Discussion

76.	Pick up the incorrect statement from the following _______________?
A.	The C.G. of a circle is at its center
B.	The C.G. of a triangle is at the intersection of its medians
C.	The C.G. of a rectangle is at the inter-section of its diagonals
D.	The C.G. of a semicircle is at a distance of r/2 from the center
E.	The C-G. of an ellipse is at its center
Answer» E. The C-G. of an ellipse is at its center

Discussion

77.	On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?
A.	downwards at its upper end
B.	upwards at its upper end
C.	perpendicular to the wall at its upper end
D.	zero at its upper end
E.	none of the above
Answer» E. none of the above

Discussion

78.	On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?
A.	towards the wall at its upper end
B.	away from the wall at its upper end
C.	upwards at its upper end
D.	downwards at its upper end
E.	none of the above
Answer» D. downwards at its upper end

Discussion

79.	Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?
A.	along the plane
B.	horizontally
C.	vertically
D.	at an angle equal to the angle of friction to the inclined plane
E.	unpredictable
Answer» E. unpredictable

Discussion

80.	Kinetic friction is the________________?
A.	tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction
B.	ratio of limiting friction and normal reaction
C.	the friction force acting when the body is just about to move
D.	the friction force acting when the body is in motion
E.	dynamic friction
Answer» E. dynamic friction

Discussion

81.	In the lever of third order, load W, effort P and fulcrum F are oriented as follows_________________?
A.	W between P and F
B.	F between W and P
C.	P between W and F
D.	W, P and F all on one side
E.	none of the above
Answer» B. F between W and P

Discussion

82.	In the equation of virtual work, following force is neglected_______________?
A.	reaction of any smooth surface with which the body is in contact
B.	reaction of a rough surface of a body which rolls on it without slipping
C.	reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
D.	all of the above
E.	none of the above
Answer» E. none of the above

Discussion

83.	In ideal machines________________?
A.	mechanical advantage is greater than velocity ratio
B.	mechanical advantage is equal to velocity ratio
C.	mechanical advantage is less than velocity ratio
D.	mechanical advantage is unity
E.	none of the above
Answer» C. mechanical advantage is less than velocity ratio

Discussion

84.	In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?
A.	two members with unknown forces of the frame
B.	three members with unknown forces of the frame
C.	four members with unknown forces of the frame
D.	three members with known forces of the frame
E.	four members with two known forces
Answer» C. four members with unknown forces of the frame

Discussion

85.	In actual machines______________?
A.	mechanical advantage is greater than velocity ratio
B.	mechanical advantage is equal to velocity ratio
C.	mechanical advantage is less than velocity ratio
D.	mechanical advantage is unity
E.	none of the above
Answer» D. mechanical advantage is unity

Discussion

86.	If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?
A.	P/2 cos 9/2
B.	IP sin 9/2
C.	2P tan 9/2
D.	IP cos 9/2
E.	Psin 9/2
Answer» E. Psin 9/2

Discussion

87.	If three forces acting in different planes can be represented by a triangle, these will be in________________?
A.	non-equilibrium
B.	partial equilibrium
C.	full equilibrium
D.	unpredictable
E.	none of the above
Answer» B. partial equilibrium

Discussion

88.	If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?
A.	meet in a point
B.	be all parallel
C.	at least two of them must meet
D.	all the above are correct
E.	none of the above
Answer» E. none of the above

Discussion

89.	If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella_________________?
A.	more inclined when moving
B.	less inclined when moving
C.	more inclined when standing
D.	less inclined when standing
E.	none of the above
Answer» E. none of the above

Discussion

90.	If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
A.	j-2
B.	2j-l
C.	2/-3
D.	3/-2
E.	2/ -4
Answer» D. 3/-2

Discussion

91.	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___________________?
A.	maximum
B.	minimum
C.	zero
D.	infinity
E.	same as the force applied
Answer» D. infinity

Discussion

92.	If a rigid body is in equilibrium under the action of three forces, then_______________?
A.	these forces are equal
B.	the lines of action of these forces meet in a point
C.	the lines of action of these forces are parallel
D.	B. and C. above
E.	none of the above
Answer» E. none of the above

Discussion

93.	If a number of forces act simultaneously on a particle, it is possible_________________?
A.	not a replace them by a single force
B.	to replace them by a single force
C.	to replace them by a single force through C.G.
D.	to replace them by a couple
E.	to replace them by a couple and a force
Answer» C. to replace them by a single force through C.G.

Discussion

94.	From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate___________________?
A.	0.5 cm
B.	1.0 cm
C.	1.5 cm
D.	2.5 cm
E.	0.25 cm
Answer» B. 1.0 cm

Discussion

95.	Frictional force encountered after commencement of motion is called________________?
A.	post friction
B.	limiting friction
C.	kinematic friction
D.	frictional resistance
E.	dynamic friction
Answer» F.

Discussion

96.	Forces are called coplanar when all of them acting on body lie in________________?
A.	one point
B.	one plane
C.	different planes
D.	perpendicular planes
E.	different points
Answer» C. different planes

Discussion

97.	Forces are called concurrent when their lines of action meet in_______________?
A.	one point
B.	two points
C.	plane
D.	perpendicular planes
E.	different planes
Answer» B. two points

Discussion

98.	Effect of a force on a body depends upon________________?
A.	magnitude
B.	direction
C.	position or line of action
D.	all of the above
E.	none of the above
Answer» F.

Discussion

99.	Dynamic friction as compared to static friction is________________?
A.	same
B.	more
C.	less
D.	may be less of more depending on nature of surfaces and velocity
E.	has no correlation
Answer» D. may be less of more depending on nature of surfaces and velocity

Discussion

100.	D’ Alembert’s principle is used for___________________?
A.	reducing the problem of kinetics to equivalent statics problem
B.	determining stresses in the truss
C.	stability of floating bodies
D.	designing safe structures
E.	solving kinematic problems
Answer» B. determining stresses in the truss

Discussion

Explore topic-wise MCQs in Civil Engineering.

The unit of power in S.I. units is______________?

The unit of force in S.I. units is_________________?

The resultant of the following three couples 20 kg force, 0.5 m arm, $ ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be_________________?

The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to__________________?

The ratio of limiting friction and normal reaction is known as_______________?

The product of either force of couple with the arm of the couple is called________________?

The possible loading in various members of framed structures are_______________?

The necessary condition for forces to be in equilibrium is that these should be_______________?

The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?

The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?

The magnitude of two forces, which when acting at right angle produce resultant force of VlOkg and when acting at 60° produce resultant of Vl3 kg. These forces are____________________?

The forces, which meet at one point, but their lines of action do not lie in a plane, are called______________?

The coefficient of friction depends on_________________?

The co-efficient of friction depends upon________________?

The C.G. of a solid hemisphere lies on the central radius 3r_______________?

The C.G. of a right circular solid cone of height h lies at the following distance from the base_____________?

The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?

The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be______________?

The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?

The center of gravity of a uniform lamina lies at_______________?

The center of gravity of a triangle lies at the point of__________________?

The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of__________________?

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__________________?

The algebraic sum of moments of the forces forming couple about any point in their plane is________________?

Pick up wrong statement about friction force for dry surfaces. Friction force is________________?

Pick up the incorrect statement from the following _______________?

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be__________________?

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be__________________?

Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?

Kinetic friction is the________________?

In the lever of third order, load W, effort P and fulcrum F are oriented as follows_________________?

In the equation of virtual work, following force is neglected_______________?

In ideal machines________________?

In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?

In actual machines______________?

If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?

If three forces acting in different planes can be represented by a triangle, these will be in________________?

If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?

If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella_________________?

If n = number of members andy = number of joints, then for a perfect frame, n =_______________?

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___________________?

If a rigid body is in equilibrium under the action of three forces, then_______________?

If a number of forces act simultaneously on a particle, it is possible_________________?

From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate___________________?

Frictional force encountered after commencement of motion is called________________?

Forces are called coplanar when all of them acting on body lie in________________?

Forces are called concurrent when their lines of action meet in_______________?

Effect of a force on a body depends upon________________?

Dynamic friction as compared to static friction is________________?

D’ Alembert’s principle is used for___________________?