Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

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Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

A. 9,100

B. 13,000

C. 7,000

D. 2,550

Correct Answer :

A. 9,100

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B. Fusion

D. Arc

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A. Boiler

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A. 0.5

B. 3

C. 10

D. 25

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A. V

B. V/2

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D. 3V

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Blast furnace slag is mainly molten

A. Sand

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Which one of the following is incombustible?

A. H2

B. CCl4

C. C2H2

D. S

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A. 768

B. 908

C. 1400

D. 1539

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A. 0

B. ∞

C. 1

D. 0.5

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Answer 1

A. Atomisation

Answer 2

B. Grinding/milling

Answer 3

C. Hammering

Answer 4

D. Electrolytic deposition

Answer 5

A. Ultraviolet radiation

Answer 6

B. High atmospheric temperature

Answer 7

C. High ambient temperature

Answer 8

D. Damp atmosphere

Answer 9

A. Rises in the tube

Answer 10

B. Rotates at higher speed

Answer 11

C. Rotates at lower speed

Answer 12

D. Drops down in the tube

Answer 13

A. Linear displacement

Answer 14

B. Concavity/convexity

Answer 15

C. Surface texture

Answer 16

D. Flatness

Answer 17

C. Resistance

Answer 18

B. K + S + K₂Cr₂O₇

Answer 19

C. S + K₂Cr₂O₇ + White P

Answer 20

D. None of these

Answer 21

A. Viscous force

Answer 22

B. Gravity force

Answer 23

C. Hydrostatic force

Answer 24

D. Surface tension force

Answer 25

B. Condenser

Answer 26

C. Evaporator

Answer 27

D. All (A), (B) & (C)

Answer 28

A. A site, where cooling towers are located nearby

Answer 29

B. A site, where open coal yard in located nearby

Answer 30

C. An air conditioned room maintained at a temperature of 18°C

Answer 31

D. An outside atmosphere at 10°C

Answer 32

A. Its high melting temperature

Answer 33

B. Chances of cracking

Answer 34

C. Oxide film formation

Answer 35

D. Chromium carbide formation

Answer 36

A. CCl₂F₂

Answer 37

B. CCl₃F

Answer 38

C. CClF₃

Answer 39

D. CCl₄F

Answer 40

A. Mild steel

Answer 41

B. Concrete

Answer 42

C. Cast iron

Answer 43

D. Asbestos cement

Answer 44

B. Magnesium silicate

Answer 45

C. Calcium silicate

Answer 46

D. Iron pyrite

Answer 47

A. Composition

Answer 48

B. Temperature

Answer 49

C. Both (A) & (B)

Answer 50

D. Neither (A) nor (B)

Answer 51

A. Electrolytic reduction

Answer 52

B. Calcium reduction

Answer 53

C. Magnesium reduction

Answer 54

D. Thermal dissociation

Answer 55

A. Providing support for the tubes

Answer 56

B. Improving heat transfer

Answer 57

C. Both 'a' & 'b'

Answer 58

D. Preventing the fouling of tubes & stagnation of shell side fluid

Answer 59

A. Negative charge

Answer 60

B. Positive charge

Answer 61

C. Zero charge

Answer 62

D. Positive or negative charge depending upon the nature of the cell

Answer 63

A. 0.01 to 0.10

Answer 64

B. 0.2 to 0.4

Answer 65

C. 0.5 to 0.7

Answer 66

D. 0.8 to 1.0

Answer 67

A. Cementite

Answer 68

B. Austenite

Answer 69

C. Martensite

Answer 70

D. Pearlite

Answer 71

A. Degradation of energy

Answer 72

B. Decrease in system pressure

Answer 73

C. Increase in the availability of energy

Answer 74

D. Increase in the temperature

Answer 75

A. Aluminium carbide

Answer 76

B. Tungsten carbide

Answer 77

C. Nickel carbide

Answer 78

D. Iron carbide

Answer 79

A. Temperature - entropy

Answer 80

B. Temperature - pressure

Answer 81

C. Enthalpy - entropy

Answer 82

D. Enthalpy-pressure

Answer 83

A. Cermets

Answer 84

B. High speed steel

Answer 85

C. Tungsten carbide

Answer 86

D. Stellite

Answer 87

A. Solid dispersed in gas

Answer 88

B. Solid dispersed in liquid

Answer 89

C. Liquid dispersed in gas

Answer 90

D. Gas dispersed in liquid

Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

Correct Answer :

Show all Chemical Engineering Basics MCQ

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Also checkout

Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Powder metallurgy process does not make metal powder by

Exposure to __________ accelerates the degradation of plastics.

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Gratings is associated with the measurement of

Thermit welding is categorised as the __________ welding.

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Which of the following forces does not act on a fluid at rest?

Heat release during phase change is observed in case of a/an

Air intake for an air compressor should be preferably taken from

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The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

The refrigerant freon-12 is chemically

Lead is poured into the joint between two __________ pipes.

'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel)

Blast furnace slag is mainly molten

Which one of the following is incombustible?

Diffusion co-efficient of a metal in a solid solution depends upon its

Titanium is produced by __________ of Ti Cl4.

Baffles provided on the shell side of a shell and tube heat exchanger are meant for

The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.

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Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel.

Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

Increase in the entropy of a system represents the

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