Related Questions

Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
A 12
B 36
C 54
D 68
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.
A 250
B 500
C 750
D 1000
A catalytic agent such platinum may be used so that the chemical reaction reaction more rapidly .
A such
B that
C reaction
D rapidly
Platinum is used in
A Electrical contacts
B Thermocouple
C Heating element in high temperature furnace
D Grids of special purpose vacuum tubes
E All of the above
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
A Increases
B Decreases
C Remains constant
D Increases exponentially
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A High cost
B Fragile nature
C Easy poisoning tendency
D All of the above
The output of a thermocouple is:
A a capacitance
B a resistance
C a current
D a voltage
E None of the above
The thermocouple instrument will measure
A Current
B Voltage
C Flux
D None of the above
The thermocouple instruments do not have
A High sensitivity
B Absence of frequency error
C Independence of ambient temperature
D High degree of measuring accuracy
The time constant of a thermocouple is
A The time taken to attain the final temperature to be measured
B The time taken to attain 50% of the value of initial temperature difference
C The time taken to attain 63.2% of the value of initial temperature difference
D Determined by the time taken to reach 100°C from 0°C

Next steps