Process Control and Instrumentation The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is π/12 π/3 5π/12 π/6 π/12 π/3 5π/12 π/6 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire. No change Increase Exponential decrease Decrease No change Increase Exponential decrease Decrease ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Volumetric expansion is the working principle of the __________ thermometers. Mercury in glass Bimetallic Constant volume gas Vapor pressure Mercury in glass Bimetallic Constant volume gas Vapor pressure ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Dilatometer is used to measure Strain Contraction/expansion due to changes in temperature Deflection Stress Strain Contraction/expansion due to changes in temperature Deflection Stress ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following temperature measuring instruments need not touch the object whose temperature is being measured? Mercury in glass thermometer Filled system thermometer Thermo electric pyrometer Radiation/infrared pyrometer Mercury in glass thermometer Filled system thermometer Thermo electric pyrometer Radiation/infrared pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C. < 0 > 0 > 800 < 100 < 0 > 0 > 800 < 100 ANSWER DOWNLOAD EXAMIANS APP
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