Process Control and Instrumentation Questions

• The unit step response of the transfer function 1/(s2 + 2s + 3)
• __________ thermometer can not measure sub-zero (< 0° C) temperature,
• The amplitude ratio for the sinusoidal response of __________ is < 1.
• Which of the following controllers has maximum offset?
• Liquid argon level in a pressurised storage tank (at 3 kg/cm2 ) is measured by a/an
• Starting temperature of optical radiation pyrometer is __________ °C.
• Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their
• The calibration data of a thermocouple with its cold junction at 0°C are given below. The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple?
• Turbine flow meters are suitable for
• Which of the systems having the following transfer function is stable?
• Use of I-control along with P-control facilitates
• The transfer function for a first order process with time delay is
• Liquid discharge from a tank or reservoir can not be measured by
• The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function
• A mercury barometer measures the __________ pressure.
• __________ are analysed using a polarograph.
• Measurement of sub-zero Celcius temperature in industry is done most commonly by
• Which of the following is not a mechanical pressure sensing element?
• Pirani gauge is used for the measurement of
• Transfer functions X/Y for which of the following block diagrams is