The valve used for very remote and accurate control of fluid is a _____________ valve?

Related Mcqs:

1. A 2″ gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is__________________?

   A. Δp
   B. < Δp
   C. > Δp
   D. Δp2

2. Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?

   A. A, C, D
   B. B, D, E
   C. A, B, E
   D. A, D, E

3. Remote control valve is a _______________ valve?

   A. Gate
   B. Butterfly
   C. Needle
   D. Globe

4. For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is___________________?

   A. More
   B. Less
   C. Equal
   D. Either A. or B.; depends on the viscosity of the fluid

5. The inherent characteristic of an equal percentage valve relating flow rate ‘q’ with valve stem movement ‘x’ are described by the equation_________________?

   A. dq/dx = K
   B. dq/dx = K.q
   C. dq/dx = K/q
   D. dq/dx = Kq2

6. Foot valve provided in the pump is a ______________ valve?

   A. Direction control
   B. Back pressure
   C. Relief
   D. Pressure reduction

7. The pressure drop per unit length of pipe incurred by a fluid ‘X’ flowing through pipe is Δp. If another fluid ‘Y’ having both the specific gravity & density just double of that of fluid ‘X’, flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be__________________?

   A. Δp
   B. 2Δp
   C. Δp2
   D. Δp/2

8. In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant ?

   A. Rotational
   B. Unsteady
   C. Turbulent
   D. Non-uniform

9. Nature of fluid flow during the opening of a valve in a pipeline is_________________?

   A. Laminar
   B. Unsteady
   C. Steady
   D. Uniform

10. A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid?

    A. Newtonian
    B. Viscous
    C. Dilatant
    D. Non-viscous