2.
A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin is 10N/mm² and diameter of the 20mm, find the shear stress in the pin.
3.
We can’t perform grinding operation in a drilling machine.
5.
Which of the following device is not used for holding the work in a drilling machine?
6.
A rope, a wheel with a groove in it and a weight make up this simple machine. You can pull down on the rope to lift the weight.
7.
What is used to make holes in hard objects
8.
Fulcrum can be located at one end of the lever.
9.
A heavy object could be rolled up this simple machine, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used.
10.
Which of the following method is not used for holding tool?
11.
The bottom of a light bulb is what type of simple machine?
12.
Leverage is the ratio of load arm to effort arm.
13.
What simple machine combines with itself to make a wedge?
14.
Which of the following are not included under planar mechanisms?
15.
A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin is 10N/mm² and diameter of the 20mm, find the length of the pin.
16.
Which of the following operations can’t be performed on a drilling machine?
17.
These two simple machines make a screw:
18.
What is the definition of a screw?
19.
Pliers is an example of what class of lever
