Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance…

A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________? A. 1 B. 0.5C. 1/√2 D. 0.25

Silver point temperature is ______________ °C? A. 760.5 B. 860.5C. 960.5 D. 1060.5

What is the Laplace transform of sin t ? A. 1/(s2 + 1) B. s/(1 + s2) C. 1/(s2 – 1) D. s/(s2 – 1)

Thermistors which have a very high temperature co-efficient of resistivity belong to the class of solid called________________? A. Dielectrics B. InsulatorsC. Semi conductors D. Conductors

Gain margin is equal to the_________________? A. Amplitude ratioB. Reciprocal of amplitude ratio C. Gain in P controller D. Gain in P-I controller

Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ? A. Mercury thermometer B. Radiation pyrometer C. Bimetallic thermometer D. Thermocouple

Composition of natural gas is determined by the_________________? A. Haldane apparatus B. Mass spectrometer C. ChromatographD. Both B. and C.

Photoelectric pyrometers are suitable in the temperature range of ________________ °C? A. 400-1600B. 800-1600 C. 800-2500 D. 400-1000

Flame photometry is used for the determination of compositional analysis of_______________? A. SolidsB. Alkali metals C. Natural gas D. Isotopes