________ is universally used for windings of electrical machines because it is easily workable without any possibility of fracture ?
A. Silver
B. Steel
C. Aluminium
D. Copper
D. Copper
Machine Design MCQs
Machine Design MCQs. Multiple Choice Questions with Answers on the topic of Machine Design related to Electrical Engineering and other branches of Physics.
__________ has a low relative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable ?
A. Cast steel
B. Aluminium
C. Soft steel
D. Cast iron
D. Cast iron
Commercial available medium size machines have a speed range of ?
A. 200 to 400 r.p.m
B. 600 to 1000 r.p.m
C. 1000 to 1500 r.p.m
D. 2000 to 2500 r.p.m
D. 2000 to 2500 r.p.m
The change in flux linkages can be caused in which of the following ways ?
A. The flux is constant with respect to time and is stationary and the coil moves through it
B. The coil is stationary with respect to flux and the flux varies in magnitude with respect to time
C. Both the changes mentioned above occur together, i.e., the coil moves through a time varying field
D. All of the above
D. All of the above
The action of electromagnetic machines can be related to which of the following basic principles ?
A. Induction
B. Interaction
C. Alignment
D. All of the above
D. All of the above