Process Control and Instrumentation Questions

• In second order underdamped system,
• Temperature of __________ can not be measured by an optical or radiation pyrometer.
• Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
• The frequency at which maximum amplitude ratio is attained is called the __________ frequency.
• For the time domain function f(t) = t, the Laplace transform of is given by
• A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is
• Find the Laplace transform of the following input function shown in figure.
• Change of angle of refraction with composition comprises the working principle of a
• The thermal emf-temperature relationship of most thermocouples is
• A system with transfer function is of __________ order.
• If response of a control system is to be free of offset and oscillation, the most suitable controller is
• Conversion formula for converting amplitude ratio (AR) into decibels is
• Flame photometry is used for the determination of compositional analysis of
• Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C?
• Gain margin is equal to the
• Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively
• Which of the following is not a composition measuring instrument?
• A control system has the following transfer function The initial value of the corresponding time function is
• Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.
• Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?