**891. The blades of a centrifugal impeller are said to be curved forward, if the ____________ of the motion of impeller blades?**

A. Inlet tip of a blade curves in a direction opposite to that

B. Outlet tip of a blade curves in a direction opposite to that

C. Inlet tip of a blade is towards the direction**D. Outlet tip of a blade is towards the direction**

**892. A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is _____________ litres?**

A. 600**B. 660**

C. 1.1

D. 60

**893. Which of the following equations is valid for laminar flow of a fluid through packed bed ?**

A. Fanning equation**B. Kozeny – Karman equation**

C. Hagen-Poiseuille equation

D. Blake-Plummer equation

**894. As per Newton’s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to (where, μ = fluid viscosity) ?**

A. 1/μ**B. μ**

C. μ2

D. 1/μ2

**895. What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ?****A. 0.5**

B. 1

C. 1.5

D. 2

**896. In case of end to end connection of two or more pipes in series, the ______________ each pipe?****A. Same rate of flow passes through**

B. Head loss is same through

C. Rate of flow in each pipe is proportional to the length of

D. Total flow rate is the sum of flow rate in

**897. The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _______________ the mean velocity of flow?**

A. Directly proportional to**B. Directly proportional to square of**

C. Inversely proportional to

D. Inversely proportional to square of

**898. With the increase in depth, the hydrostatic pressure in an un-accelerated incompressible fluid (in a constant gravitational field) ?**

A. Decreases**B. Increases linearly**

C. Increases exponentially

D. Remain constant

**899. Which of the following is used for very accurate measurement of flow of gas at low velocity ?**

A. Pitot tube

B. Rotameter

C. Segmental orificemeter**D. Hot wire anemometer**

**900. Which law/principle of solid mechanics is similar/equivalent to Newton’s law of viscosity in fluid mechanics ?**

A. Archimedes principle

B. Newton’s second law of motion**C. Hooke’s law**

D. Newton’s third law of motion

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