MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Mechanical Engineering
Engineering Mechanics
Quiz 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
Work done is said to be zero, when
Some force acts on a body, but displacement is zero
No force acts on a body but some displacement takes place
Either (A) or (B)
None of the above
Q.2
The friction experienced by a body, when in motion, is known as
Rolling friction
Dynamic friction
Limiting friction
Static friction
Q.3
Static friction is always __________ dynamic friction.
Equal to
Less than
Greater than
None of these
Q.4
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of
0.5 r
0.6 r
0.7 r
0.8 r
Q.5
The acceleration of a body sliding down an inclined surface is
g sinθ
g cosθ
g tanθ
None of these
Q.6
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
Q.7
A framed structure is imperfect, if the numbers of members are __________ (2j - 3).
Equal to
Less than
Greater than
Either (B) or (C)
Q.8
If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that
tanθ = ΣH/ΣV
tanθ = ΣV/ΣH
tanθ = ΣV × ΣH
tanθ = √(ΣV + ΣH)
Q.9
Two coplanar couples having equal and opposite moments
Balance each other
Produce a couple and an unbalanced force
Are equivalent
Cannot balance each other
Q.10
The ratio of static friction to dynamic friction is always
Equal to one
Less than one
Greater than one
None of these
Q.11
The units of moment of inertia of an area are
kg-m²
m⁴
kg/m²
m³
Q.12
Limiting force of friction is the
Tangent of angle between normal reaction and the resultant of normal reaction and 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
Q.13
Coulomb friction is the friction between
Bodies having relative motion
Two dry surfaces
Two lubricated surfaces
Solids and liquids
Q.14
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be
Maximum
Minimum
Zero
Infinity
Q.15
Which of the following statement is correct in connection with projectiles?
A path, traced by a projectile in the space, is known as trajectory.
The velocity, with which a projectile is projected, is known as the velocity of projection.
The angle, with the horizontal, at which a projectile is projected, is known as angle of projection.
All of the above
Q.16
The slope on the road surface generally provided on the curves is known as
Angle of friction
Angle of repose
Angle of banking
None of these
Q.17
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)
(1/2π). √(l/g)
(1/2π). √(g/l)
2π. √(l/g)
None of these
Q.18
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)
n
n²
2n
2n - 1
Q.19
The acceleration of a particle moving with simple harmonic motion, at any instant is given by
ω.y
ω2.y
ω2/y
ω3.y
Q.20
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.
Less than
More than
Equal to
None of These
Q.21
The coefficient of restitution for inelastic bodies is
Zero
One
Between zero and one
More than one
Q.22
A framed structure is perfect if it contains members equal to (Where, n = number of joints in a frame)
2n³
2n
n²
3n²
Q.23
The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is
D/(d₁ + d₂)
D/(d₁ - d₂)
2D/(d₁ + d₂)
2D/(d₁ - d₂)
Q.24
The center of gravity of a triangle lies at the point of
Concurrence of the medians
Intersection of its altitudes
Intersection of bisector of angles
Intersection of diagonals
Q.25
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
25
50
100
250
Q.26
Which of the following is a scalar quantity?
Force
Speed
Velocity
Acceleration
Q.27
Which of the following is a vector quantity?
Energy
Mass
Momentum
Angle
Q.28
Which of the following statement is correct?
The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation
The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity
The velocity of the particle moving with simple harmonic motion is zero at the mean position
The acceleration of the particle moving with simple harmonic motion is maximum at the mean position
Q.29
The maximum velocity of a particle moving with simple harmonic motion is
ω
ωr
ω2r
ω/r
Q.30
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of
r/2
r/A
r/3
0.134 r
Q.31
Which of the following statement is correct?
The kinetic energy of a body during impact remains constant
The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact
The kinetic energy of a body before impact is less than the kinetic energy of a body after impact
The kinetic energy of a body before impact is more than the kinetic energy of a body after impact
Q.32
The centre of gravity of a uniform lamina lies at
The centre of heavy portion
The bottom surface
The midpoint of its axis
All of the above
Q.33
Moment of inertia of a circular section about an axis perpendicular to the section is
πd3/16
πd3/32
πd4/32
πd4/64
Q.34
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is
D + d
D - d
D × d
D / d
Q.35
A screw jack used for lifting the loads is
A reversible machine
A non-reversible machine
An ideal machine
None of these
Q.36
A machine having an efficiency less than 50%, is known as
Reversible machine
Non-reversible machine
Neither reversible nor non-reversible machine
Ideal machine
Q.37
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
Q.38
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)
v = u + a.t
s = u.t + ½ a.t2
v2 = u2 + 2a.s
All of these
Q.39
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is
mr²/2
mr²/4
mr²/6
mr²/8
Q.40
If three forces acting in different planes can be represented by a triangle, these will be in
Non-equilibrium
Partial equilibrium
Full equilibrium
Unpredictable
Q.41
The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.
3r/ 8
4r/ 3π
8r/3
3r/4π
Q.42
The rate of change of displacement of a body is called
Velocity
Acceleration
Momentum
None of these
Q.43
Effect of a force on a body depends upon
Magnitude
Direction
Position or line of action
All of the above
Q.44
Which of the following is not a scalar quantity?
Mass
Volume
Density
Acceleration
Q.45
If the gravitational acceleration at any place is doubled, then the weight of a body will be
g/2
g
√2.g
2g
Q.46
Which of the following is not a vector quantity?
Weight
Velocity
Acceleration
Force
Q.47
Which of the following is not the unit of power?
kW (kilowatt)
hp (horse power)
kcal/sec
kcal/kg sec
Q.48
Pick up wrong statement about friction force for dry surfaces. Friction force is
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
Q.49
A body will begin to move down an inclined plane if the angle of inclination of the plane is _________ the angle of friction.
Equal to
Less than
Greater than
None of these
Q.50
The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as
Coplanar concurrent forces
Coplanar non-concurrent forces
Like parallel forces
Unlike parallel forces
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page