MCQ
1581. Which of the following is an inversion of four bar chain?
Coupled wheels of locomotive
Whitworth quick return mechanis
Reciprocating air compressor
Hand pump
1582. 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
1583. The velocity of a particle coming from a height 'h' is -
2√(gh)
√(gh)
√ (2gh)
2g√h
1584. The unit of moment of inertia of an area is-
kg-m²
kg-m-sec²
kg/m^4
m^4
1585. 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
1586. The units of moment of inertia of mass are-
kg-m²
m4
kg/m²
kg/m
1587. The contract ratio of a gear is
Zero
less than
More than 1
Infinite
1588. The angle at which the teeth of the gear are inclined to the axis of a gear is called as-
Pitch angle
Normal angle
Helix angle
Gear angle
1589. 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
1590. In which power transmitting drive polygon effect is observed?
Belt drive
Chain drive
Both ক andখ
None of the above
1591. The motion of a wheel of a car is-
purely translation
purely rotational
combined translation and rotational
none of these
1592. In roller bearings which type of rolling elements are used?
Cylindrical rollers
Taper rollers
Spherical rollers
All of the above
1593. 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
1594. Which gears are used to connect two intersecting shaft axes?
Crossed helical gear
Worm and worm wheel
Bevel gears
All of the above
1595. Cylindrical roller bearings have greater-
axial load carrying capacity
thrust load carrying capacity
radial load carrying capacity
all of the above
1596. If the line AB have forward bearing 130° the what is then backward bearing?
50°
220°
310°
30°
1597. 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
1598. 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
1599. 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
1600. Bull bearing is usually made from-
low carbon steel
high carbon steel
medium carbon steel
chrome steel