High temperature of around 2000°C of incandescent gas mantles is measured by a/an __________________?

A. V-notch
B. Rotameter
C. Orificemeter
D. Weir

A. CO2 analyser
B. Polarimeter
C. Spectrometer
D. Chromatograph

A. 12
B. 36
C. 54
D. 68

A. Based on the principle of Faraday’s law
B. Capable of measuring the flow rate of slurries and electrolytes
C. Based on the linear relationship between the fluid flow rate and the induced voltage
D. All A., B. and C.

A. Bourdon gauge
B. U-tube manometer
C. Inclined tube manometer
D. Pirani gauge

A. Q0(T0 – T) = Ac . h (dT/dt)
B. Q0T0 – QT = Ac . h (dT/dt)
C. Q(T0 – T) = Ac . h (dT/dt)
D. Q(T0 – T) = Ac . (dTH/dt)