The temperature in isentropic flow_______________?

Related Mcqs:

1. In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature) ?

   A. 1/√T
   B. 1/T
   C. √T
   D. T

2. An isentropic process is the one, in which_________________?

   A. pv = constant
   B. pvr= constant
   C. pvr = constant, and process is reversible
   D. None of these

3. In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas) ?

   A. 1/√M
   B. √M
   C. 1/M
   D. M

4. Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around________________?

   A. 2000
   B. 10
   C. 100
   D. 1000

5. In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure ______________ the vapor pressure of the liquid at the suction temperature?

   A. Lower than
   B. Higher than
   C. Equal to
   D. None of these

6. Mass velocity is independent of temperature & pressure, when the flow is______________________?

   A. Unsteady through unchanged cross-section
   B. Steady through changing cross-section
   C. Steady and the cross-section is unchanged
   D. Unsteady and the cross-section is changed

7. A Rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and Rotameter shows the same reading, the flow rate (cc/sec) is__________________?

   A. 26
   B. 42
   C. 269
   D. 325

8. With increase in the temperature, viscosity of a liquid____________________?

   A. Increases
   B. Decreases
   C. Remain constant
   D. May increase or decrease; depends on the liquid

9. The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the_____________________?

   A. Barometric pressure
   B. Speed of the impeller
   C. Diameter of the impeller
   D. Both B. and C.

10. Viscosity of water is about _____________ times that of air at room temperature?

    A. 15
    B. 55
    C. 155
    D. 1050