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
Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
A 24 %
B 36 %
C 40 %
D 60 %
Which of the following alloys does not contain nickel?
A Chlorinet - 2 alloy
B Monel
C Inconel
D Babbit metal
The active materials of a nickel-iron battery are
A nickel hydroxide
B powdered iron and its oxide
C 21% solution of kOH
D all of the above
Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
A Powder metallurgy
B Casting
C Forging
D None of these
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
Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.
A Chromel - alumel
B Iron - constantan
C Platinum - platinum + rhodium
D Copper-constantan
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 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

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