Related Questions

In an electric room heat convector the method of heating used is Resistance heating
A True
B False
In resistance heating highest working temperature is obtained from heating elements made of
A Nickel copper
B Nichrome
C Silicon carbide
D Silver
Heating wet steam at constant temperature is heating it at constant
A Volume
B Pressure
C Entropy
D Enthalpy
In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating
A Decreases with increase in Rankine cycle efficiency
B Increases with increase in Rankine cycle efficiency
C Is unaffected by increase in Rankine cycle efficiency
D None of the above
In heating the ferromagnetic material by induction heating, heat is produced due to
A Induced current flow through the charge
B Hysteresis loss taking place below Curie temperature
C Due to hysteresis loss as well as eddy current loss taking place in the charge
D None of the above factors
Gross heating value of coal is __________ the net heating value.
A Higher than
B Lower than
C Same as
D None of these
An alloy used in making heating elements for electric heating device is
A Solder
B Alloy Steel
C Nichrome
D German Silver
Induction heating takes place in which of the following?
A Insulating materials
B Conducting materials which are magnetic
C Conducting materials which are nonmagnetic
D Conducting materials which may or may not be magnetic
Induction heating takes place it which of the following?
A Insulating materials
B Conducting materials which are magnetic
C Conducting materials which are non-magnetic
D Conducting materials which may or may not be magnetic
When vaporisation takes place directly at the heating surface, it is called
A Film boiling
B Nucleate boiling
C Vapour binding
D None of these

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