Process Control and Instrumentation Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere? Platinum-platinum + rhodium Chromel-alumel Copper-constantan Iron-constantan Platinum-platinum + rhodium Chromel-alumel Copper-constantan Iron-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³. 1 10 50 100 1 10 50 100 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Phase lag of the frequency response of a second order system to a sinusoidal forcing function Is 30° Is 120° Is 90° at the most Approaches 180° asymptotically Is 30° Is 120° Is 90° at the most Approaches 180° asymptotically ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Gain margin is equal to the Gain in P-I controller Gain in P controller Reciprocal of amplitude ratio Amplitude ratio Gain in P-I controller Gain in P controller Reciprocal of amplitude ratio Amplitude ratio ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The __________ of a vapor pressure thermometer is a secondary element. Bulb Pointer None ofthese Bourdon tube Bulb Pointer None ofthese Bourdon tube ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are Air to open valve with the controller indirect acting Air to close valve with the controller direct acting Air to close valve with the controller indirect acting Air to open valve with the controller direct acting Air to open valve with the controller indirect acting Air to close valve with the controller direct acting Air to close valve with the controller indirect acting Air to open valve with the controller direct acting ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS