500 Best Applied Mechanics MCQ
Q105). The unit of force in C.G.S. system of units, is called
a).dyne
b).Newton
c).kg
d).all the above.
Correct Answer:
dyne
Explanation:
Q106). A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is
a).17° 48′
b).18° 48′
c).19° 48′
d).20° 48′
Correct Answer:
19° 48′
Explanation:
Q107). From a circular plate of a diameter 6 cm is cut out a circle whose diameter is equal to the radius of the plate. The C.G. of the remainder from the centre of circular plate is at a distance of
a).2.0 cm
b).1.5 cm
c).1
d).0.5 cm.
Correct Answer:
0.5 cm.
Explanation:
Q108). The force which produces an acceleration of 1 m/sec^2 in a mass of one kg, is called
a).dyne
b).Netwon
c).joule
d).erg.
Correct Answer:
Netwon
Explanation:
Q109). The units of inertia of mass, are
a).kg/m
b).kg/m2
c).m4
d).Kg-m2
Correct Answer:
0
Explanation:
Q110). A sphere is resting on two planes BA and BC which are inclined at 45° and 60° respectively with the horizontal. The reaction on the plane BA will be
a).less than that on BC
b).more than that of BC
c).equal to that on BC
d).zero
Correct Answer:
more than that of BC
Explanation:
Q111). A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is
a).0°
b).30°
c).45°
d).60°
Correct Answer:
45°
Explanation:
Q112). A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is
a).15
b).18
c).20
d).26
Correct Answer:
20
Explanation: