Test: Fluid Dynamics & Flow Through Pipes - 2 - Mechanical Engineering MCQ

Assertion (A): Bernoulli's equation is an energy equation.  
Reason (R): Starting from Euler's equation, one can arrive at Bernoulli's equation.

Consider the following assumptions: 
1. The fluid is compressible
2. The fluid is inviscid.
3. The fluid is incompressible and homogeneous
4. The fluid is viscous and compressible.
The Euler's equation of motion requires assumptions indicated in :

How is the velocity coefficient C_v, the discharge coefficient C_d, and thecontraction coefficient C_c of an orifice related?  

Match List-I (Measuring Devices) with List-II (Measured Parameter) and select the correct answer using the codes given below: 

Match List-I with List-II and select the correct answer using the codes given below the lists:  

Which one of the following conditions will linearize the Navier-Stokes equations to make it amenable for analytical solutions? 

Assertion (A) : A cylinder, partly filled with a liquid is rotated about itsvertical axis. The rise of liquid level at the ends is equal to the fall ofliquid level at the axis.  
Reason (R) : Rotation creates forced vortex motion.

Assertion (A): Head loss for sudden expansion is more than the head loss for a sudden contraction for the same diameter ratio.  
Reason (R): Head loss varies as the square of the upstream and downstream velocities in the pipe fitted with sudden expansion or sudden contraction.

Which one of the following statements relates to expression ' ρ vc'?

Velocity of pressure waves due to pressure disturbances imposed in aliquid is equal to: 

For maximum transmission of power through a pipe line with totalhead H, the head lost due to friction hf is given by:  

Point A of head 'H_A' is at a higher elevation than point B of head 'H_B^'.The head loss between these points is H_L. The flow will take place.  

If energy grade and hydraulic grade lines are drawn for flow through an inclined pipeline the following 4 quantities can be directly observed:
1. Static head
2. Friction head  
3. Datum head
4. Velocity head
Starting from the arbitrary datum line, the above types of heads will:

If coefficient of contraction at the vena contract is equal to 0.62, thenwhat will be the dynamic loss coefficient in sudden contraction in airconditioningduct?  

Which one of the following statements is correct?  

For a circular channel, the wetted parameter (where R = radius of circular channel, θ = half the angle subtended by the water surface atthe centre) is given by: 

The pressure drop in a pipe flow is directly proportional to the meanvelocity. It can be deduced that the  

How does the head loss in turbulent flow in pipe vary?  

Aging of pipe implies  

The frictional head loss in a turbulent flow through a pipe varies        

Assertion (A): Nature of the fluid flow in a pipe does not dependentirely on average velocity but it actually a function of the Reynoldsnumber.  
Reason (R): Reynolds number depends not only on average velocity butalso on the diameter of the pipe and kinematic viscosity of the fluid.

Which one of the following statements is true of fully developed flowthrough pipes?

A right circular cylinder is filled with a liquid upto its top level. It isrotated about its vertical axis at such a speed that halt the liquid spillsout then the pressure at the point of intersection of the axis and bottom surface is:  

Both free vortex and forced vortex can be expressed mathematically as functions of tangential velocity V at the corresponding radius r. Freevortex and forced vortex are definable through V and r as 
 

The Bernoulli’s equation refers to conservation of 

If the Reynolds number is less than 2000, the flow in a pipe is

If a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena contracta, then its coefficient of contraction willbe: