Instrumentation and Control MCQs

Protective coating by a suitable cover are applied over strain gauge in order to protect it against

The resistance of strain gauge grid used in pressure transducers is of the order of

During temperature changing conditions, quite appreciable difference, occurs between the -true-temperature and the measured temperature because of the time required for the transfer of heat through thermometer pockets (thermowells) to thermometer sensing element. This time lag is of the order of :

Pick up false statement :

Automatic cold junction compensation in thermocouple is provided by :

The material used for resistance temperature sensor is :

To prevent self-heating errors becoming too great, the current through platinum element (100 ohm) is kept at a very small value :

In calibration of temperature sensors by fixed point method, the device is calibrated at :

Pick up correct statement about calibration of temperature sensors by comparison method using liquid bath :