MCQ
1601.
In roller bearings which type of rolling elements are used?
Cylindrical rollers
Taper rollers
Spherical rollers
All of the above
1602.
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
1603.
Which gears are used to connect two intersecting shaft axes?
Crossed helical gear
Worm and worm wheel
Bevel gears
All of the above
1604.
If the line AB have forward bearing 130° the what is then backward bearing?
50°
220°
310°
30°
1605.
A framed structure is perfect if it contains members equal to-
2n-3
n-1
2n-1
n-2
1606.
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
1607.
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
1608.
The distance between the corresponding points on adjacent teeth measured on the pitch circle is-
Helical pitch
Normal pitch
Gear pitch
Circular pitch
1609.
When a body of mass m attains a velocity v from rest in time I then kinetic energy of translation is-
mv²
mgv²
0.5v²
0.5mv ²
1610.
The possible loading in various members of framed structures are-
compression or tension
bucking or shear
shear or tension
all of the above
1611.
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
1612.
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
1613.
Cylindrical roller bearings have greater-
axial load carrying capacity
thrust load carrying capacity
radial load carrying capacity
all of the above
1614.
In a screw jack an effort of 50kg is required to lift a load of 100kg. The mechanical advantage of the machine is-
5
4
3
2
1615.
Two spiral gears have a normal module of 10mm and the angle between the skew shaft axes is 50°. The driver has 20 teeth and the helix angle of it is 30°. If the velocity ratio is 1/3 and the driver as well as the follower are both left handed, find the centre distance between the shafts.
434.72mm
452.83mm
582.19mm
523.39mm
1616.
The shortest distance measured along the normal to the helix between corresponding points on the adjacent teeth is called-
Gear pitch
Helical pitch
Circular pitch
Normal circular pitch
1617.
D' Alembert's principle is used for-
reducing the problem of kinetics to equivalen statics problenz
determining stresses in the truss
stability of floating bodies
designing safe structures
1618.
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
1619.
The contract ratio of a gear is
Zero
less than
More than 1
Infinite
1620.
Bull bearing is usually made from-
low carbon steel
high carbon steel
medium carbon steel
chrome steel