Calculate the solid length of a spring, given that the number of coils in the spring is 10 and the diameter of the spring wire is 2 millimeters.

____________ are used to connect two non-parallel or intersecting shafts which are coplanar in nature.

Which one is the correct expression for equivalent twisting moment? Here, M is the bending moment and T is the twisting moment

If the strength of the key and the shaft is equal, then the length of the key will be _________.

What is the value of margin of a riveted joint which is kept to prevent the tearing of the riveted plates at the edges? Here d is the diameter of the rivet hole

In a long bearing, the ratio of the length of the journal to the diameter of the journal is ________.

In a screw thread, the nominal diameter represents the _________.

In a helical gear, the helix angle for a single helical gear ranges from _______.

The efficiency of a riveted joint is __________.

Calculate the twisting moment acting on the shaft which undergoes a torsional shear stress of 21 newtons per square millimeter. The diameter of the shaft is 300 millimeters and the polar moment of inertia of the shaft is 100 (millimeter)4.

If the diameter of the rivet hole is 10 millimeters, calculate the shearing area at the cross section of the rivet.