Computer Programming MCQs

5739 MCQs  (Page 208 of 574)

For intermittent work which of the following furnaces is suitable ?
A. Indirect arc furnace
B. Core less furnace
C. Either of the above
D. None of the above
For heating element high resistivity material is chosen to______________?
A. Reduce the length of heating element
B. Increase the life of the heating element
C. Reduce the effect of oxidation
D. Produce large amount of heat
Induction heating process is based on which of the following principles ?
A. Thermal ion release principle
B. Nucleate heating principle
C. Resistance heating principle
D. Electro-magnetic induction princi¬ple
Which of the following will happen if the thickness of refractory wall of furnace is increased ?
A. Heat loss through furnace wall will increase
B. Temperature inside the furnace will fall
C. temperature on the outer surface of furnace walls will drop
D. energy consumption will increase
Induction furnaces are employed for which of the following ?
A. Heat treatment of castings
B. Heating of insulators
C. Melting aluminium
D. None of the above
In an electric room heat convector the method of heating used is______________?
A. Arc heating
B. Resistance heating
C. Induction heating
D. Dielectric heating