Radiations from a black body are proportional to____________?
Radiations from a black body are proportional to____________?
A. T1
B. T2
C. T3
D. T*
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The material of the heating element for a furnace should have___________?
The material of the heating element for a furnace should have___________?A. lower melting point
B. higher temperature coefficient
C. high specific resistance
D. all of the aboveAjax Wyatt furnace is started when____________?
Ajax Wyatt furnace is started when____________?A. it is filled below core level
B. it is filled above core level
C. it is fully empty
D. none of the aboveIt is desirable to operate the arc furnaces at power factor of_____________?
It is desirable to operate the arc furnaces at power factor of_____________?A. zero
B. 0.707 lagging
C. unity
D. 0.707 leadingFor the transmission of heat from one body to another__________?
For the transmission of heat from one body to another__________?A. temperature of the two bodies must be different
B. both bodies must be solids
C. both bodies must be in contact
D. at least one of the bodies must have some source of heatingis used for heating non-conducting materials?
is used for heating non-conducting materials?A. Eddy current heating
B. Arc heating
C. Induction heating
D. Dielectric heatingIn induction heating ___________ is abnormally high?
In induction heating ___________ is abnormally high?A. phase angle
B. frequency
C. current
D. voltage