MCQ
1621.
The units of moment of inertia of mass are-
kg-m²
m4
kg/m²
kg/m
1622.
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve-
Catenary
Parabola
Hyperbola,
Elliptical
1623.
A compressor is driven by a motor and flat belt without any slip, diameter of the motor pulley is 15cm, motor pulley rpm is 1440, compressor rpm is 600. Diameter of the compressor pulley is-
60cm
42cm
36cm
28cm
1624.
From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the c.g. of the remainder from the center of circular plate-
0.5cm
1.0cm
1.5cm
2.5cm
Himalay Sen Sir
মেকানিক্যাল ইঞ্জিনিয়ারিং MCQ
mechanical mcq
মেকানিক্যাল বিগত সালের প্রশ্ন সমাধান
ইঞ্জিনিয়ারিং মেকানিক্স mcq
ব্যাখ্যা: Area of Circle = πR²
Where R = radius of the circle
D = 2R
D = Diameter of circle
Given
The Diameter of the circular plate = 6 cm
The diameter of the circle to be cut = 3 cm
Radius of circular plate R = 6/2 = 3
Radius of circle r= 3/2 = 1.5
The Center gravity of the circle acts on the center of a circle.
r/R= 1.5/3 = 0.5 cm
1625.
The center of percussion of the homogeneous rod of length L. suspended at the top will be-
L/2
L/3
3L/4
2L/3
1626.
The velocity of a particle coming from a height 'h' is -
2√(gh)
√(gh)
√ (2gh)
2g√h
1627.
Pick up the incorrect statement from the following-
The CG of a circle is at its center
The CG of a triangle is at the intersection of its medians
The CG of a rectangle is at the inter-rection of its diagonals
The CG of a semicircle is at a distance of r/2 from the center
1628.
The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be-
r/2
2r/3
r/A
3r/2
1629.
Center of percussion is-
the point of CG
the point of metacentre
the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
point of suspension
1630.
The polar moment of inertia of a solid circular shaft of diameter (D) is-.
πD^3/16
πD^3/32
πD^4/32
πD^4/64
1631.
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
1632.
The unit of the radial motion -
m/min
cm/sec
rad/sec
mm/sec
1633.
The motion of a wheel of a car is-
purely translation
purely rotational
combined translation and rotational
none of these
1634.
The CG of a plane lamina will not be at its geometrical centre in the case of a-
Right angled triangle
Equilateral triangle
Square
square
1635.
The CG of a right circular solid cone of height h lies at the following distance from the base-
h/2
J/3
h/6
h/4
1636.
The unit of moment of inertia of an area is-
kg-m²
kg-m-sec²
kg/m^4
m^4
1637.
Moment of inertia is the-
second moment of force
second moment of area
second moment of mass
all of these
1638.
In which power transmitting drive polygon effect is observed?
Belt drive
Chain drive
Both ক andখ
None of the above
1639.
Which of the following is an inversion of four bar chain?
Coupled wheels of locomotive
Whitworth quick return mechanis
Reciprocating air compressor
Hand pump
1640.
Center of gravity of a thin hollow cone lies on the axis at a height of-
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