Process Control and Instrumentation

151. Platinum resistance thermometer can be used upto antimony point which is _________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

1. 961.93
2. 630.74
3. 1064.43
4. 1261.93

View answer

152. Platinum resistance thermometer is the international standard for temperature measurement between

1. Triple point of hydrogen and freezing point of antimony
2. 13.81°K to 903.9°K
3. Both (A) and (B)
4. Neither (A) nor (B)

View answer

153. Polarisation of light forms the working principle of a

1. Polarimeter
2. Polarograph
3. Chromatograph
4. Spectrometer

View answer

154. Polarograph is meant for the analysis of

1. Gaseous mixture
2. Miscible liquids
3. Solids
4. Isotopes

View answer

155. Positioning controllers are used for

1. Low loads
2. Temperature changes
3. High loads
4. Flow rate changes

View answer

156. Presence of a small amount of water in the organic systems can be determined by the _________ method.

1. Electrical conductivity
2. Polarimetry
3. Emission spectroscopy
4. Dielectric constant end loss factor

View answer

157. Pressure of 0.0001 absolute psi can be measured by _________ gauge.

1. Mcleod
2. Pirani
3. Thermocouple
4. None of these

View answer

158. Pressure of 0.01 psi (absolute) can be measured by _________ gauge.

1. Ionisation
2. Pirani
3. Mcleod
4. None of these

View answer

159. Process degree of freedom indicates _________ number of controllers to be used.

1. The maximum
2. The minimum
3. Both maximum and the minimum
4. Nothing about the

View answer

160. Pyrometry refers to the measurement of temperature

1. With the mercurial thermometer upto 350°C
2. Directly
3. Which is of higher magnitude
4. All (A), (B) & (C)

View answer