Q.1.
Which of the following will happen if the thickness of refractory wall of furnace is increased?
Q.2.
In an electric room heat convector the method of heating used is Resistance heating
Q.3.
It is desirable to operate the arc furnaces at power factor of
Q.4.
Which of the following methods is used to control temperature in resistance furnaces?
Q.5.
By which of the following methods the temperature inside arcane can be varied?
Q.6.
Which of the following insulating materials was suitable for low temperature applications?
Q.7.
Direct arc furnaces have which of the following power factors?
Q.8.
Which of the following devices is necessarily required for automatic temperature control in a furnace?
Q.9.
________ is used for heating non-conducting materials.
Q.10.
Induction heating process is based on which of the following principles?
Q.11.
In the indirect resistance heating method, maximum heat-transfer takes place by
Q.12.
Ajax Wyatt furnace is started when
Q.13.
In resistance heating highest working temperature is obtained from heating elements made of
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.
For radiant heating around 2250°C, the heating elements are made of
Q.17.
Hysteresis loss and eddy current loss are used in
Q.18.
In arc furnace the function of choke is
Q.19.
Induction heating takes place it which of the following?
Q.20.
In an electric room heat convector the method of heating used is