MCQ
1641.
The product of either force of couple with the arm of the couple is called-
resultant couple
moment of the forces
resulting couple
moment of the couple
1642.
When trying to turn a key into a lock, following is applied-
coplanar force
non-coplanar forces
lever
couple
1643.
The rate of charge of displacement of a body is called.
Velocity
acceleration
momentum
none
1644.
Two coplanar couples having equal and opposite moments-
balance each other
produce a couple and an unbalanced force
are equivalent
can not balance each other
1645.
Kern of a circular section is a concentric circular area having a diameter equal to -
half of the diameter of the section.
One-third of the diameter of the section.
One-fourth of the diameter of the section.
One-fifth of the diameter of the section.
1646.
Moment of inertia about the base of a triangle of base 'B' and height '' is-
1/24 bh^4
1/18 bh^3
1/12 bh^3
1/6 bh^3
1647.
If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella-
more inclined when movirig
less inclined when moving
more inclined when standing
less inclined when standing
1648.
Which of the following is a vector quantity?
Energy
mass
momentum
angle
1649.
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-
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
1650.
Center of gravity of a solid cone lies on the axis at the height-
one-fourth of the total height above base
one-third of the total height above base
one-half of the total height above base
three-eighth of the total height above the base
1651.
The moment of inertia of a square of side K about an axis through its centre of gravity is-
a² /8
a² /12
a^4 /12
a² /16
1652.
A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is-
0°
30°
45°
60°
1653.
To parallel sides of a trapezium are a and b its heights is h so CG from base is at.......
π x (a+b)/3h
h/3 .b+2a/b+a
3/8.b+a/a-2h
2h/3. b+2a/b+a
1654.
The centre of a semi-circle lies at a distance of ... from its base measured along the vertical radius.
3π/8
4r/3π
38π/3
3r/4π
1655.
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
1656.
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span-
2.5cm
3.0cm
4.0cm
5.0cm
Himalay Sen Sir
মেকানিক্যাল ইঞ্জিনিয়ারিং MCQ
mechanical mcq
মেকানিক্যাল বিগত সালের প্রশ্ন সমাধান
ইঞ্জিনিয়ারিং মেকানিক্স mcq
ব্যাখ্যা: এখানে,
w=1.2kg
I = 20m
T = 1500kg
আমরা জানি, T = wI²/8x
⇒ x = wI²/8T
= 1.2×20²/8x1500
=0.04m = 4cm
1657.
An irregular body may have more than one center of gravity.
agree
disagree
1658.
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
1659.
The point through which the whole weight of the body acts is known as--
moment of inertia
center of gravity
center of percussion
center of mass
1660.
A solid cone has a height 'h', height of the CG of the cone above the base is-
h/4
2h/4
3h/4
4h/3