Related Questions

Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons?
A To avoid initial rush of current
B To avoid change in kW rating with temperature
C Both (A) and (B)
D Either (A) or (B)
Due to which of the following reasons copper and aluminium are not used for heating elements ?
A Both have great tendency for oxidation
B Both have low melting point
C Very large length of wires will be required
D All 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
Heating wet steam at constant temperature is heating it at constant
A Volume
B Pressure
C Entropy
D Enthalpy
In resistance heating highest working temperature is obtained from heating elements made of
A Nickel copper
B Nichrome
C Silicon carbide
D Silver
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a
A Batch reactor is preferred over a single CSTR for high yield
B Tubular reactor is preferred over a single CSTR for high yield
C Both A and B
D Single CSTR is the most suitable
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 an electric room heat convector the method of heating used is Resistance heating
A True
B False
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

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