Related Questions

Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
A Insulator
B Conductor
C Solid semi-conductor
D Liquid semi-conductor
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
Two hundred multiples of seven are chosen at random. and 300 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?
A 20%
B 25%
C 40%
D 80%
The material of the heating element for a furnace should have
A Lower melting point
B Higher temperature coefficient
C High specific resistance
D All of the above
On which of the following factors does the resistivity of a material depend ?
A Resistance of the conductor
B Area of the conductor section
C Length of the conductor
D All of the above
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 resistance heating highest working temperature is obtained from heating elements made of
A Nickel copper
B Nichrome
C Silicon carbide
D Silver
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

Next steps