Q.1.
In electric press, mica is used because it is _______ conductor of heat but/and________ conductor of electricity.
Q.2.
Induction heating takes place in which of the following?
Q.3.
Induction furnaces are employed for which of the following?
Q.4.
Radiant heating is used for which of the following?
Q.5.
The temperature inside a furnace is usually measured by which of the following?
Q.6.
By the use of which of the following, high frequency power supply for induction furnaces can be obtained?
Q.7.
In a resistance furnace the atmosphere is
Q.8.
In an electric press mica is used
Q.9.
The electrode of a direct arc furnace is made of
Q.10.
Which of the following heating methods has maximum power factor?
Q.11.
Heat transfer by condition will not occur when
Q.12.
For heating element high resistivity material is chosen to
Q.13.
The material of the heating element for a furnace should have
Q.14.
Radiations from a black body are proportional to
Q.15.
Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons?
Q.16.
In induction heating __________ is abnormally high.
Q.17.
welding methods where fusion is achieved by heating the materials to be joined using an electric arc(s). This may be done with or without filler material.
Q.18.
The temperature that needs to be reached to allow metal to begin to liquefy.