Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?

Related Mcqs:

1. 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 in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop?

   A. Tank 1
   B. Tank 2
   C. Tank 3
   D. Tank 4

2. In a single tank system, the transfer function of _____________ to inlet flow rate is 1/(TS+1)?

   A. Outlet flow rate
   B. Level
   C. Both A. & B.
   D. Neither A. nor B.

3. In a single tank system, the transfer function of level to inlet flow rate is__________________?

   A. R/TS
   B. R/(TS + 1)
   C. 1/TS
   D. None of these

4. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by _____________ effect?

   A. Peltier
   B. Thomson
   C. Seebeck
   D. None of these

5. In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the ______________ variable?

   A. Load
   B. Controlled
   C. Manipulated
   D. None of these

6. Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________?

   A. Magnetic flowmeter
   B. Pitot tube
   C. Flow nozzle type flowmeter
   D. Turbine flowmeter

7. Which of the following fluid flow measuring devices can measure the largest flow rate ?

   A. V-notch
   B. Rotameter
   C. Orificemeter
   D. Weir

8. Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

   A. Water
   B. Mercury
   C. Methyl alcohol
   D. Carbon-tetrachloride

9. Degree to which an instrument indicates the changes in measured variable without dynamic error is called its ___________________?

   A. Speed of response
   B. Reproducibility
   C. Fidelity
   D. Static characteristics

10. 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. e-ηS
    B. (T1S + 1)/(T2S + 1)
    C. (T1S/(T2S + 1)
    D. (T1S + 1)/(T2S