Chemical Engineering Quiz - SHAHEEN LEADERS ACADEMY PAKISTAN

Chemical Enginering Quiz

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Chemical Engineering

Chemical Engineering Quiz

1 / 25

Which may be termed as a variable orifice flowmeter:-

Pitot tube

V-notch

Ratometer

2 / 25

For pipe flows , head is proportional to ____________ at constant capacity:-

1/D²

1/D

1/D 5

3 / 25

The equivalent diameter for pressure drop calculation for a duct of square cross section is given by:-

x/2

4 / 25

Cocks are used to control:-

water

any liquid

solid

5 / 25

Brownian movement is prominent in the particle size range of _________________ microns in case of settling of a particle in a fluid:-

2 - 3

200-300

0.1 - 0.10

6 / 25

If the surface of liquid is convex, then cohesion pressure is:-

decreased

Negligible

Increased

7 / 25

Drag force on the float of a ratometer is:-

constant

8 / 25

Glass pipes can be joined by:-

Bell and spigot joint

Weldings

Flanges

9 / 25

Weber number is the ratio of inertial force to ___________ force;-

viscous

Gravity

Surface tension

10 / 25

_____________ is a formula for the friction factor of circular pipes:-

64/Re

Re/64

16 / Re

11 / 25

Rotary vacuum pumps can reduce the absolute pressure to as low as _____________ mm Hg:-

0.1

0.01

12 / 25

Mach number in an incompressible fluid is always unity:-

True

False

13 / 25

In a fluidised bed reactor:-

Temperature gradient are very high

Temperature is more or less uniform

Hot spots are formed

14 / 25

Velocity head on sudden enlargement in a horizontal pipe is converted into _________ head;-

both a, b

elevation

pressure

15 / 25

Newton's la of viscosity relates the Shear stress and ______________:-

Velocity gradient

Pressure gradient

rate of angular deformation in fluid

16 / 25

Bernoulli's equation does not apply to the functioning of a:-

Orificemeter

None of them

pitot tube

Venturimeter

17 / 25

The mach number for hypersonic flow of compressible fluid is:-

18 / 25

Boundary layer separation is caused by the reduction of pressure gradient to zero:-

False

True

19 / 25

Which equation is valid for laminar flow of a fluid through a packed bed:-

Fanning equation

Kozney Kerman equation

Hagen Poiseuille equation

20 / 25

The pressure at a point in a fluid is not the same in all directions, when the fluid viscous and:-

cold

static

Moving

hot

21 / 25

A fluid whose apparent viscosity increases with shear is termed as the ____________ fluid:-

Viscous

Newtonion

Dilatent

22 / 25

___________ has the maximum compression ratio:-

Blower

Vacuum pump

Compressor

23 / 25

When the Mach number is in between __________________ the flow is called super sonic flow:-

4 and 6

1 and 6

2.5 and 4

1 and 2.5

24 / 25

In case of a centrifugal pump,the theoretical head developed is dependent on the __________ impeller:-

speed of

fluid velocity of leaving

all of them

diameter of

25 / 25

Hydraulic radius is the ratio of;-

Both a, b

flow area to wetted parameter

None

Wetted parameter to flow area

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