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___________________?

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. Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q’ under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is____________________?

   A. Q/2
   B. Q/4
   C. Q/8
   D. Q/16

3. A globe valve is the most suitable for applications, in which____________________?

   A. Fluid flow control is required
   B. Fluid contains dispersed solid particles
   C. Valve is required to be either fully open or fully closed
   D. One way flow is required

4. 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

5. A gas (density = 1.5 kg/m3, viscosity = 2 × 10‒5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10‒5kg/m.s flowing at 3 m/s will be________________?

   A. 8400 Pa/m
   B. 12600 Pa/m
   C. 18900 Pa/m
   D. 16800 Pa/m

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

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

7. Remote control valve is a _______________ valve?

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

8. 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

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

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

10. For the same terminal conditions and fitting size, the least friction loss is incurred in a/an ?

    A. T-joint
    B. Union
    C. 45° elbow
    D. 90°bend