Related MCQ Question

• which is used for heating non-conducting materials?
• Which of the following method of heating is not dependent on the frequency of supply?
• Heat transfer by condition will not occur when
• A perfect black body is one which
• Heat is transferred simultaneously by condition, convection and radiation
• The process of heat transfer during the re-entry of satellites and missiles, at very high speeds, into earth’s atmosphere is known as
• Which of the following has the highest value of thermal conductivity?
• Induction heating process is based on which of the following principles?
• Which of the following insulating materials is suitable for low temperature applications?
• A non-dimensional number generally associated with natural convection heat transfer is
• The temperature inside a furnace is usually measured by
• Which of the following will happen if the thickness of refractory wall of furnace is increased?
• The material of the heating element for a furnace should have
• In a resistance furnace the atmosphere is  ____________
• The temperature inside a resistance furnace can be varied by
• High frequency power supply for induction furnaces can be obtained by
• Induction furnaces are employed for which of the following?
• In an electric room heat convector, the method of heating used is
• In a domestic cake baking oven the temperature is controlled by
• In an electric press, mica is used
• Induction heating takes place in which of the following?
• For heating element high resistivity material is chosen to
• In resistance heating highest working temperature is obtained from heating elements made of ____________
• In the indirect resistance heating method, maximum heat-transfer takes place by
• Low temperature co-efficient of heating element is desired due to which of the following reasons?
• Which of the following methods is used to control temperature in resistance furnaces?
• It is desirable to operate the arc furnaces at power factor of 
• In arc furnace the function of choke is 
• Ajax Wyatt furnace is started when 
• In electric press, mica is used because it is 
• Hysteresis loss and eddy current loss are used in
• In heating the ferromagnetic material by induction heating, heat is produced due to
• Radiant heating is used for which of the following?
• Which devices is necessarily required for automatic temperature control in a furnace?
• For radiant heating around  2250 degree Celsius, the heating elements are made of
• Which of the following is an advantages of eddy current heating?
• The electrode of a direct arc furnace is made of
• Direct arc furnaces have which of the following power factors?
• In direct arc furnace, which of the following has high value?