Cassiterite is an ore of

Question

Cassiterite is an ore of

A. Tin

B. Lead

Correct Answer :

A. Tin

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Comment

Screws are specified by their __________ diameters.

A. Minor

B. Major

C. Pitch

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The condition of diffraction from a crystal is given by

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The product out from a cupola is called

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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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Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

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Brazing is the joining of metals

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Addition of __________ to steel does not help in improving its machinability.

C. Lead

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Current employed in resistance welding ranges from __________ kVA/.

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The same volume of all gases is representative of their

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Pick out the correct combination about the role of various additives used in polymers.

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Which of the following materials has the poorest electrical conductivity?

A. Carbon

C. Silver

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__________ is not used as the control rod material in a nuclear reactor.

A. Cobalt

D. Boron

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

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Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8

A. °C

B. °F

C. °K

D. °R

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Tip of the match stick contains a mixture of

A. K + S

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Primary designation of steel is based on its

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Silicon percentage in the silicon steel used for electrical appliances/equipments is

B. 12-14

C. 3-4

D. 20-25

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

C. Slag

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The joint for soldering is supported by binding wire made of

B. Copper

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Brittleness induced due to the presence of sulphur in steel can be reduced by adding

D. Copper

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Nickel is a __________ material.

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Corrosion is

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Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?

A.

B.

C.

D.

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Which of the following is not a ferromagnetic material?

A. Nickel

B. Cobalt

D. Iron

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Silicon percentage in acid resistant cast iron is about

A. 4

B. 8

C. 14

D. 20

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Multistage compression of air as compared to single stage compression offers the advantage of

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The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

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There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

A. One

B. Two

C. Three

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Identify the false statement

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Which of the following is not used as a bearing material?

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Answer 1

C. Molybdenum

Answer 2

D. Chromium

Answer 3

D. None of these

Answer 4

A. nλ = 2d Sin θ

Answer 5

B. λ = d Sin 2θ

Answer 6

C. λ = 2d Sin 2θ

Answer 7

D. nλ = d Sin θ

Answer 8

A. Wrought iron

Answer 9

B. Pig iron

Answer 10

C. Cast iron

Answer 11

D. None of these

Answer 12

A. Re^0.5, Re^0.8

Answer 13

B. Re^0.8, Re^-0.5

Answer 14

C. Re^0.8, Re^0.5

Answer 15

D. Re^-0.8, Re^0.5

Answer 16

A. Without melting the base metal

Answer 17

B. With a non-ferrous filler

Answer 18

C. Both (A) & (B)

Answer 19

D. Neither (A) nor (B)

Answer 20

A. Sulphur

Answer 21

B. Silicon

Answer 22

D. Phosphorous

Answer 23

A. 1.2 to 2.5

Answer 24

B. 4.5 to 6.2

Answer 25

C. 7.5 to 8.5

Answer 26

D. 10.5 to 15.5

Answer 27

A. Specific gravities

Answer 28

B. Densities

Answer 29

C. Gas characteristic constants

Answer 30

D. Molecular weights

Answer 31

A. Plasticiser: increases the polymer strength

Answer 32

B. Heat stabiliser: increases the maximum service temperature

Answer 33

C. Fillers: Does not affect the property of polymer but increases its weight

Answer 34

D. Lubricants: increases the flexibility of polymers

Answer 35

B. Aluminium

Answer 36

D. Stainless steel

Answer 37

B. Hafnium

Answer 38

C. Cadmium

Answer 39

A. Viscous force

Answer 40

B. Gravity force

Answer 41

C. Hydrostatic force

Answer 42

D. Surface tension force

Answer 43

B. K + S + K₂Cr₂O₇

Answer 44

C. S + K₂Cr₂O₇ + White P

Answer 45

D. None of these

Answer 46

A. Hardness & tensile strength

Answer 47

B. Carbon content

Answer 48

C. Iron content

Answer 49

D. Alloying elements content

Answer 50

A. 0.3-0.4

Answer 51

A. Hot metal

Answer 52

B. Flue gases

Answer 53

D. Refractory lining

Answer 54

A. Mild steel

Answer 55

C. Soft iron

Answer 56

D. Stainless steel

Answer 57

A. Manganese

Answer 58

B. Magnesium

Answer 59

C. Vanadium

Answer 60

A. Ferromagnetic

Answer 61

B. Semi-conductor

Answer 62

C. Paramagnetic

Answer 63

D. Ferroelectric

Answer 64

A. A physical phenomenon

Answer 65

B. A chemical phenomenon

Answer 66

C. Same as erosion

Answer 67

D. An uncontrollable phenomenon

Answer 68

C. Aluminium

Answer 69

A. Power saving per unit weight of air delivered

Answer 70

B. Moisture elimination in the inter-stage cooler

Answer 71

C. Increased volumetric efficiency

Answer 72

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

Answer 73

B. Manganese

Answer 74

C. Both 'a' nor 'b'

Answer 75

D. Neither 'a' nor 'b'

Answer 76

D. None of these

Answer 77

A. Martensitic steels are less susceptible to pitting corrosion than austenitic steels

Answer 78

B. Pitting corrosion is usually very localised

Answer 79

C. Hydrogen embrittlement is facilitated by tensile stress

Answer 80

D. Stress corrosion cracking is facilitated by tensile stress

Answer 81

A. Copper-lead alloys

Answer 82

B. Babbitts

Answer 83

C. Bronzes

Answer 84

D. Cermets

Cassiterite is an ore of

Correct Answer :

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Related Questions

Screws are specified by their __________ diameters.

The condition of diffraction from a crystal is given by

The product out from a cupola is called

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?

Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

Brazing is the joining of metals

Addition of __________ to steel does not help in improving its machinability.

Current employed in resistance welding ranges from __________ kVA/.

The same volume of all gases is representative of their

Pick out the correct combination about the role of various additives used in polymers.

Which of the following materials has the poorest electrical conductivity?

__________ is not used as the control rod material in a nuclear reactor.

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

Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8

Tip of the match stick contains a mixture of

Primary designation of steel is based on its

Silicon percentage in the silicon steel used for electrical appliances/equipments is

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

The joint for soldering is supported by binding wire made of

Brittleness induced due to the presence of sulphur in steel can be reduced by adding

Nickel is a __________ material.

Corrosion is

Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?

Which of the following is not a ferromagnetic material?

Silicon percentage in acid resistant cast iron is about

Multistage compression of air as compared to single stage compression offers the advantage of

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

Identify the false statement

Which of the following is not used as a bearing material?

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