Q.1
________ has the highest value of thermal conductivity.
Q.2
Heat is transferred simultaneously by condition, convection and radiation
Q.3
For radiant heating around 2250°C, the heating elements are made of
Q.4
Induction heating takes place in which of the following?
Q.5
In electric press, mica is used because it is _______ conductor of heat but/and________ conductor of electricity.
Q.6
In resistance heating highest working temperature is obtained from heating elements made of
Q.7
A non-dimensional number generally associated with natural convection heat transfer is
Q.8
The electrode of a direct arc furnace is made of
Q.9
In an electric press mica is used
Q.10
Which of the following insulating materials was suitable for low temperature applications?
Q.11
By which of the following methods the temperature inside arcane can be varied?
Q.12
When a body reflects entire radiation incident on it, then it is known as
Q.13
Heat transfer by condition will not occur when
Q.14
Which of the following has the highest value of thermal conductivity?
Q.15
Hysteresis loss and eddy current loss are used in
Q.16
In an electric room heat convector the method of heating used is
Q.17
Method has leading power factor
Q.18
The process of heat transfer during the re-entry of satellites and missiles, at very high speeds, into earth?s atmosphere is known as
Q.19
Ajax Wyatt furnace is started when
Q.20
In a resistance furnace the atmosphere is
0 h : 0 m : 1 s