Process Control and Instrumentation Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature? Chromel-alumel Iron-constantan Platinum-platinum + rhodium Copper-constantan Chromel-alumel Iron-constantan Platinum-platinum + rhodium Copper-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is G/H H/G H(1 + G) G/(1 + H) G/H H/G H(1 + G) G/(1 + H) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Emf developed by a thermocouple while measuring a temperature of 400°C is 22 mV. The type of thermocouple used is Iron-constantan Platinum-rhodium Platinum-platinum+rhyodium Chromel-alumel Iron-constantan Platinum-rhodium Platinum-platinum+rhyodium Chromel-alumel ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a 'contact' pyrometer? Radiation pyrometer Infra red pyrometer Optical pyrometer Resistance pyrometer Radiation pyrometer Infra red pyrometer Optical pyrometer Resistance pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermometers is not suitable for distant reading upto 60 metres? Resistance thermometer Vapor pressure thermometer Constant volume gas thermometer Mercury in glass thermometer Resistance thermometer Vapor pressure thermometer Constant volume gas thermometer Mercury in glass thermometer 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. Decrease Increase Exponential decrease No change Decrease Increase Exponential decrease No change ANSWER DOWNLOAD EXAMIANS APP
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