The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Question

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

A. 2-5

B. 18-20

C. 12-15

D. 6-12

Correct Answer :

A. 2-5

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Nusselt number/Biot number varies

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The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

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A. Glass

C. Brine

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Case hardening of a material is

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Wood is a/an __________ material.

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Cascade control is

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Addition of silicon to cast iron

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In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

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Chromium molybdenum steel cannot be welded using __________ welding.

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The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.

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Most of the phosphorous present in the blast furnace burden enters into

C. Slag

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Which of the following can be manufactured using powder metallurgy techniques?

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On being hit with a hammer, __________ will readily fracture.

A. Brass

D. Lead

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Fibrous fracture is normally encountered in the __________ materials.

A. Hard

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Pick out the wrong conversion of absolute & kinematic viscosities.

Discuss this answer

Resilience of a bolt can be increased by increasing its

A. Length

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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach

B. Froude

D. Euler

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Dielectric

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Which of the following heat treatment processes is usually applied to castings?

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Transformer cores are normally made from

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Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Discuss this answer

Milk is fat dispersed in water. It is an example of

C. Gel

Discuss this answer

Maximum permissible air velocity in pipelines is about __________ metre/second.

A. 5

B. 10

C. 20

D. 40

Discuss this answer

Oxyacetylene reducing flame is used while carrying out welding on

Discuss this answer

To improve the machinability of steel, it is generally subjected to

Discuss this answer

Answer 1

A. Inversely with thermal conductivity

Answer 2

B. Directly with heat transfer co-efficient

Answer 3

C. Directly with thermal conductivity

Answer 4

D. Inversely with the dimension of the solid

Answer 5

A. Cyaniding

Answer 6

B. Sherardizing

Answer 7

C. Spheroidising

Answer 8

D. None of these

Answer 9

A. Piercing

Answer 10

B. Spinning

Answer 11

C. Drawing

Answer 12

D. Extrusion

Answer 13

A. Fatigue strength

Answer 14

B. Creep strength

Answer 15

C. Resilience

Answer 16

D. Endurance limit

Answer 17

B. Diamond

Answer 18

D. Kerosene

Answer 19

A. Less than the wet bulb temperature

Answer 20

B. More than the wet bulb temperature

Answer 21

C. Equal to the wet bulb temperature

Answer 22

D. Equal to the ambient temperature

Answer 23

A. Period increases

Answer 24

B. Period decreases

Answer 25

C. Group increases

Answer 26

D. Both 'b' & 'c'

Answer 27

A. Nuclear fission

Answer 28

B. Nuclear fusion

Answer 29

C. A combination of both nuclear fission & fusion

Answer 30

D. None of these

Answer 31

A. Followed by tempering or carburising

Answer 32

B. Preceded by its tempering

Answer 33

C. Done to get a soft ductile interior with a very hard surface

Answer 34

D. Carried out to get extreme hardness in its core

Answer 35

A. Amorphous

Answer 36

B. Cellular

Answer 37

C. Homogeneous

Answer 38

D. Granular

Answer 39

A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller

Answer 40

B. Used when changes in process conditions cause serious upsets in the controlled variable

Answer 41

C. Useful to control flow from temperature

Answer 42

D. All 'a', 'b' & 'c'

Answer 43

A. Promotes graphite module formation

Answer 44

B. Improves its ductility

Answer 45

C. Does not promote graphite flakes formation

Answer 46

D. Increases the fluidity of molten metal

Answer 47

A. Stainless steel

Answer 48

B. Mild steel

Answer 49

C. High speed steel

Answer 50

D. High carbon steel

Answer 51

A. Thermit

Answer 52

B. Electrical resistance

Answer 53

C. Oxy-acetylene

Answer 54

D. Any of these

Answer 55

A. Fluidity

Answer 56

B. Basicity

Answer 57

C. Acidity

Answer 58

D. Viscosity

Answer 59

A. Hot metal

Answer 60

B. Flue gases

Answer 61

D. Refractory lining

Answer 62

A. Brake linings

Answer 63

B. Bearings

Answer 64

C. Carbide tool tips

Answer 65

D. All 'a', 'b' and 'c'

Answer 66

B. Mild steel

Answer 67

C. Cast iron

Answer 68

B. Elastic

Answer 69

C. Ductile

Answer 70

D. Brittle

Answer 71

A. 1 stoke = 1 cm²/sec

Answer 72

B. 1 N.sec/m² = 10 paise

Answer 73

C. 1 stoke = 1 m²/sec

Answer 74

D. 1 m²/sec = 10⁴ stokes

Answer 75

B. Shank diameter

Answer 76

C. Head diameter

Answer 77

D. None of these

Answer 78

C. Reynolds

Answer 79

A. Is an electrical insulating material

Answer 80

B. Of low resistivity is preferred

Answer 81

C. Should have high thermal conductivity

Answer 82

D. Need not defy the corrosive action of chemicals

Answer 83

A. Tempering

Answer 84

B. Annealing

Answer 85

C. Normalising

Answer 86

D. Carburising

Answer 87

A. Soft ferrites

Answer 88

B. High purity iron

Answer 89

C. Grain oriented Fe-Si alloy

Answer 90

D. Al-Ni-Co alloy

Answer 91

A. 10 atm-1

Answer 92

B. 105 atm-1

Answer 93

C. 10 (dimensionless)

Answer 94

D. 105 (dimensionless)

Answer 95

A. Suspension

Answer 96

B. Emulsion

Answer 97

D. Solution

Answer 98

A. Alloy steel

Answer 99

B. Grey cast iron

Answer 100

C. Mild steel

Answer 101

D. High carbon steel

Answer 102

A. Spheroidising

Answer 103

B. Tempering

Answer 104

C. Normalising

Answer 105

D. Annealing

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Correct Answer :

Show all Chemical Engineering Basics MCQ

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Nusselt number/Biot number varies

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

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Which of the following heat treatment processes is usually applied to castings?

Transformer cores are normally made from

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

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Also checkout

The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Correct Answer :

Show all Chemical Engineering Basics MCQ

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Nusselt number/Biot number varies

The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?

Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

Out of the following the refractive index is the highest for

At 100% relative humidity, the dew point temperature of moist air is

Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same

The phenomenon occurring during explosion of a hydrogen bomb is

Case hardening of a material is

Wood is a/an __________ material.

Cascade control is

Addition of silicon to cast iron

In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

Chromium molybdenum steel cannot be welded using __________ welding.

The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.

Most of the phosphorous present in the blast furnace burden enters into

Which of the following can be manufactured using powder metallurgy techniques?

On being hit with a hammer, __________ will readily fracture.

Fibrous fracture is normally encountered in the __________ materials.

Pick out the wrong conversion of absolute & kinematic viscosities.

Resilience of a bolt can be increased by increasing its

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

Dielectric

Which of the following heat treatment processes is usually applied to castings?

Transformer cores are normally made from

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Milk is fat dispersed in water. It is an example of

Maximum permissible air velocity in pipelines is about __________ metre/second.

Oxyacetylene reducing flame is used while carrying out welding on

To improve the machinability of steel, it is generally subjected to

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The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.