MCQ
1681.
Which of the following is not a vertor quantity?
Weight
Velocity
Acceleration
Force
1682.
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if-
the floor is smooth, the wall is rough
the floor is rough, the wall is smooth
the floor and wall both are smooth surfaces
the floor and wall both are rough surfaces
1683.
The resultant of two forces P and Q acting at an angle is
√P ² + Q ² + 2PQ sinθ
√P ² + Q ² + 2PQcosθ
√P ² + Q ² -2PQ sinθ
√P ² + Q ²- 2PQcosθ
1684.
The ratio of static friction to dynamic friction Is always-
equal to one
stream line
steady
turbulent
None
Himalay Sen Sir
মেকানিক্যাল ইঞ্জিনিয়ারিং MCQ
mechanical mcq
মেকানিক্যাল বিগত সালের প্রশ্ন সমাধান
ইঞ্জিনিয়ারিং মেকানিক্স mcq
ব্যাখ্যা: The ratio of static friction to dynamic friction is always greater than one.
Friction: Friction is an opposing force that comes into play when the body is actually moving (slide or roll) or even tries to move over the surface of another body.
Static friction (Fs): The opposing force that is active when the body tends to move over the surface, but the actual motion is vet not started.
Kinetic friction(Fk): Kinetic or dynamic force is an opposing force that is active when the body is actually moving on another surface.
1685.
The resultant of two force P & Q Such that P >Q) acting along the same straight line but in opposite direction is given by-
P+Q
P-Q
P/Q
Q/P
1686.
Two non-collinear parallel equal forces acting in opposite direction-
balance each other
constitute a moment
constitute a couple
constitute a moment of couple
1687.
The friction experience by a body, when at rest is known as-
static friction
dynamic friction
limiting friction
coefficient of friction
1688.
Least force required to draw a body up the inclined. plane is W sin (plane inclination + friction angle) applied in the direction-
along the plane
horizontally
vertically
at an angle equal to the angle of friction to the inclined plane
1689.
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-
20 kg. (-ve) sense
20 kg. (+ve) serse
10 kg. (+ve) sense
10 kg. (-ve) sense
Himalay Sen Sir
মেকানিক্যাল ইঞ্জিনিয়ারিং MCQ
mechanical mcq
মেকানিক্যাল বিগত সালের প্রশ্ন সমাধান
ইঞ্জিনিয়ারিং মেকানিক্স mcq
ব্যাখ্যা: 30 ×1+R x 0.5 – 40 × 0.25 =20 x 0.5
∴R = -20 kg
1690.
The unit of force in SI system of units is-
Dyne
Kilogram
Newtch
Watt
1691.
Angle of friction is the-
angle between normal reaction and the resultant of normal reaction and the limiting friction
ratio of limiting friction and normal reaction
the ratio of minimum friction force to the friction force acting when the body is just about to move
the ratio of minimum friction force to friction force acting when the body is in motion
1692.
The friction experienced by a body, when at rest, is known as-
station friction
dynamic friction
limiting friction
coefficient of friction
1693.
If three forces acting in different planes can be represented by a triangle, these will be in-
non-equilibrium
partial equilibrium
full equilibrium
unpredictable
1694.
According to Lami's theorem-
three forces acting at a point will be in equilibrium
three forces acting at a point can be represented by a triangle, each side being proportional to force
if three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
1695.
The coefficient of friction depends on
area of contact
shape of surfaces
strength of surfaces
nature of surface
1696.
Two force P and working in the same direction. Then the total force is
P+Q
R
P-Q
P/Q
1697.
The angle of inclination of the plane at which the body beings to move down the plane is called-
angle of friction
angle of repose
angle of projection
gone of those
1698.
A block sliding down an inclined plane has acceleration - acceleration due to gravity.
less than
greater than
same as
none of the above
1699.
A single force and a couple acting in the same plane upon a rigid body-
balance each other
cannot balance each other
produce moment of a couple
are equivalent
1700.
A weight 'W' kg rest on a spring of spring constant K= 8kg/cm. The deflection of the spring due to weight is 4cm. The weight 'W' is-
16kg
32kg
64kg
128kg
Himalay Sen Sir
মেকানিক্যাল ইঞ্জিনিয়ারিং MCQ
mechanical mcq
মেকানিক্যাল বিগত সালের প্রশ্ন সমাধান
ইঞ্জিনিয়ারিং মেকানিক্স mcq
ব্যাখ্যা: W = δk
= 4 x 8
= 32kg
এখানে,
δ = 4cm
K= δ.kg/cm