MCQ
1581. The unit of moment of inertia of an area is-
kg-m²
kg-m-sec²
kg/m^4
m^4
1582. Cylindrical roller bearings have greater-
axial load carrying capacity
thrust load carrying capacity
radial load carrying capacity
all of the above
1583. If the line AB have forward bearing 130° the what is then backward bearing?
50°
220°
310°
30°
1584. In roller bearings which type of rolling elements are used?
Cylindrical rollers
Taper rollers
Spherical rollers
All of the above
1585. Moment of inertia is the-
second moment of force
second moment of area
second moment of mass
all of these
1586. In which power transmitting drive polygon effect is observed?
Belt drive
Chain drive
Both ক andখ
None of the above
1587. What is meant by gear ratio?
The ratio of pinion speed and gear speed
The ratio of number of teeth on pinion and number of teeth on gear
Both ক. and খ.
None of the above
1588. Determine torque transmitted on the pinion shaft if torque transmitted on gear shaft is 20 N.m. Consider Gear ratio = 4
8 N-m
5 N-m
80 N-m
16 N-m
1589. Which gears are used to connect two intersecting shaft axes?
Crossed helical gear
Worm and worm wheel
Bevel gears
All of the above
1590. The motion of a wheel of a car is-
purely translation
purely rotational
combined translation and rotational
none of these
1591. Which of the following is the locus of 25 a point that moves in such a manner that its distance from a fixed point is equal to its distanc from a fixed line multiplied by a constant greater than one-
Ellipse
Hyperbola
Parabola
Circle
1592. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly-
38m
62.5m
96m
124m
1593. Which of the following is an inversion of four bar chain?
Coupled wheels of locomotive
Whitworth quick return mechanis
Reciprocating air compressor
Hand pump
1594. The contract ratio of a gear is
Zero
less than
More than 1
Infinite
1595. 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
1596. The velocity of a particle coming from a height 'h' is -
2√(gh)
√(gh)
√ (2gh)
2g√h
1597. 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
1598. Bull bearing is usually made from-
low carbon steel
high carbon steel
medium carbon steel
chrome steel
1599. The units of moment of inertia of mass are-
kg-m²
m4
kg/m²
kg/m
1600. 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