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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 2
31.
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.
Peltier
Thomson
Seebeck
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Configuration of Bourdon spring tube is never made of __________ shape.
circular
semi-circular
helical
spiral
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Thermodynamic celcius scale of temperature measurement is
defined on the basis of melting point of ice and evaporation temperature of water vapor.
defined on the basis of melting point of ice and condensation temperature of water vapor.
having an interval of 100° between ice point to steam point.
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is
0°
45°
90°
180°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit
overdamped response.
underdamped response.
undamped response.
unstable response.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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