Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

Question

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

A. 0.5

B. 1

C. 1/3

D. 2.5

Correct Answer :

D. 2.5

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A. 25

B. 35

C. 55

D. 75

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A. Steel

B. Glass

C. Rubber

D. Brass

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The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.

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Dislocations are __________ defects.

A. Point

B. Line

C. Volume

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Which of the following is an acidic constituent of B.F. slag?

A.

B. FeO

C. MgO

D. CaO

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The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

A. 159

B. 1837

C. 2537

D. 10000

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A. Rain

C. Storm

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Brinell Hardness Number (BHN) for talc is approximately in the range of

A. 1-5

B. 20-30

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Which one of the following is incombustible?

A. H2

B. CCl4

C. C2H2

D. S

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Fire refining process is employed in case of

A. Tin

B. Copper

C. Zinc

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Which of the following rays has the least wavelength?

D. X-rays

Discuss this answer

Answer 1

A. Brine (sea water)

Answer 2

B. Diamond

Answer 3

C. Distilled water

Answer 4

A. Close the surface porosity

Answer 5

B. Break the continuity of columnar grains

Answer 6

C. Flatten the weldment

Answer 7

D. Introduce texture in the weld

Answer 8

A. Styrofoam

Answer 9

C. Perspex

Answer 10

D. Plexiglass

Answer 11

A. Immobility of dislocation

Answer 12

B. Strain-ageing

Answer 13

C. Increase in Young's modulus

Answer 14

D. Strain hardening

Answer 15

A. Combustion with air

Answer 16

B. Gravitational pull by earth

Answer 17

C. Friction with earth's atmosphere

Answer 18

D. Loss in weight of the satellite

Answer 19

A. Soluble in solid state

Answer 20

B. Insoluble in liquid state

Answer 21

C. Insoluble in both solid & liquid state

Answer 22

D. Soluble in liquid state

Answer 23

A. Evaporative capacity

Answer 24

B. Evaporation efficiency

Answer 25

C. Thermal efficiency

Answer 26

D. Steam load

Answer 27

D. None of these

Answer 28

A. Tungsten

Answer 29

B. Zirconium

Answer 30

C. Molybdenum

Answer 31

D. Tantalum

Answer 32

A. Thermosetting polymers

Answer 33

B. High carbon steels

Answer 34

C. Brasses

Answer 35

D. Borosilicate glasses

Answer 36

A. Wet bulb temperature increases

Answer 37

B. Dry bulb temperature remains constant

Answer 38

C. Dew point temperature increases

Answer 39

D. Dry bulb temperature increases

Answer 40

A. Molybdenum

Answer 41

B. Chromium

Answer 42

C. Vanadium

Answer 43

D. Silicon

Answer 44

A. Brake linings

Answer 45

B. Bearings

Answer 46

C. Carbide tool tips

Answer 47

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

Answer 48

A. Emissivity of pipe surface

Answer 49

B. Diameter & length of the pipe

Answer 50

C. Temperature of hot pipe surface & that of air in the room

Answer 51

D. None of these

Answer 52

A. Is at rest & has zero viscosity

Answer 53

B. Is frictionless

Answer 54

C. Fluid layer has no motion relative to an adjacent layer of fluid

Answer 55

D. is incompressible & frictionless

Answer 56

B. Cold wave

Answer 57

D. Fair weather

Answer 58

A. Ferrous

Answer 59

B. Ceramic

Answer 60

C. Cemented carbide

Answer 61

D. Non-ferrous cast alloy cutting tool

Answer 62

A. Nuclear fission

Answer 63

B. Nuclear fusion

Answer 64

C. A combination of both nuclear fission & fusion

Answer 65

D. None of these

Answer 66

A. Conduction

Answer 67

B. Convection

Answer 68

C. Radiation

Answer 69

D. Both 'a' & 'b'

Answer 70

A. Strain rate is increased

Answer 71

B. Grain size is increased

Answer 72

C. Prior cold deformation is increased

Answer 73

D. Not affected by any of the above parameters

Answer 74

C. 100-150

Answer 75

D. 200-250

Answer 76

A. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

Answer 77

B. Approximately 80% of the aluminium deposited on the cathode comes from cryolite

Answer 78

C. Sodium is deposited along with aluminium, but is immediately vaporised

Answer 79

D. Anode effect sets in when the cryolite concentration goes below 40%.

Answer 80

A. Nitrogen oxides

Answer 81

B. Hydrocarbons

Answer 82

C. Both 'a' & 'b'

Answer 83

D. Carbon monoxide

Answer 84

D. Aluminium

Answer 85

A. Ultraviolet rays

Answer 86

B. Infrared rays

Answer 87

C. Cosmic rays

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

Correct Answer :

Show all Chemical Engineering Basics MCQ

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Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene welding is __________ Nm3.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

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A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.

Dislocations are __________ defects.

__________ has the highest melting point out of the following.

A form of stress corrosion failure termed as 'season cracking' is generally observed in

Which of the following is an acidic constituent of B.F. slag?

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?

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Nickel and __________ are the alloying element added in steel to increase its toughness.

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

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

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Sudden fall of atmospheric pressure by a large amount is an indication of the

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The phenomenon occurring during explosion of a hydrogen bomb is

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

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Which one of the following is incombustible?

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