Q.1
For intermittent work which of the following furnaces is suitable?
Q.2
Due to which of the following reasons it is desirable to have short arc length?
Q.3
Resistance variation method of temperature control is done by connecting resistance elements in
Q.4
In heating the ferromagnetic material by induction heating, heat is produced due to
Q.5
In the indirect resistance heating method, maximum heat-transfer takes place by
Q.6
Induction heating process is based on which of the following principles?
Q.7
In direct arc furnace, which of the following has high value?
Q.8
Which of the following is an advantage of heating by electricity?
Q.9
In a domestic cake baking oven the temperature is controlled by
Q.10
________ is used for heating non-conducting materials.
Q.11
Which of the following devices is necessarily required for automatic temperature control in a furnace?
Q.12
Which of the following methods of heating is not dependent on the frequency of supply?
Q.13
In arc furnace the function of choke is
Q.14
Which of the following is an advantage of eddy current heating?
Q.15
Properly of low temperature coefficient of heating element is desired due to which of the following reasons?
Q.16
Radiant heating is used for which of the following?
Q.17
Induction furnaces are employed for which of the following?
Q.18
Which of the following will happen if the thickness of refractory wall of furnace is increased?
Q.19
Direct arc furnaces have which of the following power factors?
Q.20
Induction heating takes place it which of the following?
0 h : 0 m : 1 s