**641. Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its________________?**

A. Inner diameter

B. Outer diameter

C. Thickness**D. Neither inner nor outer diameter**

**642. Capillary tube method of viscosity measurement is based on the ________________?****A. Hagen-Poiseuille’s equation**

B. Stoke’s law

C. Navier-stokes equation

D. None of these

**643. In the low Reynolds number region, the drag force on a sphere is proportional to_______________?**

A. V

B. V2

C. V4**D. V0.5**

**644. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?**

A. 0.5

B. 0.67

C. 1**D. 2**

**645. Turbine impeller____________________?**

A. Produces only radial current

B. Produces only tangential current**C. Is effective over wide range of viscosities**

D. Does not produce tangential current

**646. One dimensional fluid flow implies the ________________________?**

A. Flow in straight lines only

B. Uniform flow

C. Steady uniform flow**D. Flow in which transverse components are zero**

**647. For laminar flow through a closed conduit____________________?****A. Vmax = 2Vav**

B. Vmax = Vav

C. Vmax = 1.5Vav

D. Vmax = 0.5Vav

**648. Each term in Bernoulli‟s equation represents the _____________ of the fluid?**

A. Energy per unit mass**B. Energy per unit weight**

C. Force per unit mass

D. None of these

**649. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is________________?**

A. More**B. Less**

C. Equal

D. Independent of porosity

**650. The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides ‘x’ & ‘y’ is given by_________________?****%MCEPASTEBIN%****A. 2xy/(x + y)**

B. xy/(x + y)

C. (x + y)/2xy

D. (x + y)/xy

**651. The nominal size of a hose pipe is specified by its _________________?****A. I.D.**

B. O.D.

C. Thickness

D. None of these

**NOTEIF YOU THINK ANY OF THE MCQ ABOVE IS WRONG.PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX.THANK YOU**