Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

Question

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

A.

B.

C.

D.

Correct Answer :

A.

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Pick out the wrong statement.

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Case hardening is not done by

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Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about

A. 1

B. 10

C. 25

D. 50

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X-rays are

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Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

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Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.

D. Any

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Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

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Normalising does not __________ of a metal.

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For preparation of porous bearings by powder metallurgy, preferred particle shape is

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

Discuss this answer

Thermit welding is categorised as the __________ welding.

A. Forge

B. Fusion

D. Arc

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Cast iron contains __________ percent carbon.

A. 2.5

B. 3.75

C. 4.75

D. 5.25

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Shaft/rotor speed is most accurately measured by a

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An alloy of Fe - 0.4 % C is

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Fibrous fracture is normally encountered in the __________ materials.

A. Hard

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Lead is poured into the joints between two __________ pipes.

B. Steel

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Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

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Colour comparator is used to measure the

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Magnetic permeability of iron is increased by its

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Filler material used in welding should have __________ as compared to the parent metal to be welded.

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Preheating before welding is done to

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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

Discuss this answer

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?

A. Tin

B. Lead

C. Zinc

D. Glass

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With increase in temperature, the electrical conductivity of semiconductors

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Unbreakable crockeries are made from __________ polymers.

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For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

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Brazing is the joining of metals

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Wrought iron is not

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Pick out the wrong statement.

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Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?

Discuss this answer

Answer 1

A. The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S

Answer 2

B. For a helical spring, deflection is proportional to D³ (D = mean coil diameter) or d⁴ (d = wire diameter)

Answer 3

C. Crushing load or columns is less than the buckling load

Answer 4

D. Modulus of resilience is proportional to (stress at elastic limit)²

Answer 5

A. Nitriding

Answer 6

B. Hot dipping

Answer 7

C. Electroplating

Answer 8

D. Both b & c

Answer 9

A. Positively charged

Answer 10

B. Negatively charged

Answer 11

C. Neutral

Answer 12

D. Of higher wavelength than visible light

Answer 13

A. Wood's metal

Answer 14

B. Babbitt metal

Answer 15

C. Monel metal

Answer 16

D. Duralumin

Answer 17

A. Horizontal

Answer 18

B. Vertical

Answer 19

C. Inclined

Answer 20

D. None of these

Answer 21

A. Improve machinability & tensile strength

Answer 22

B. Remove internal stresses

Answer 23

C. Refine the structure

Answer 24

D. Remove strains caused by cold working

Answer 25

A. Spherical

Answer 26

B. Nodular

Answer 27

C. Irregular

Answer 28

D. No preferred shape

Answer 29

A. Cementite

Answer 30

B. Austenite

Answer 31

C. Martensite

Answer 32

D. Pearlite

Answer 33

C. Resistance

Answer 34

A. Frequency counter

Answer 35

B. Tachometer

Answer 36

C. Strobometer

Answer 37

D. Speedometer

Answer 38

A. Cast iron

Answer 39

B. Hypo-eutectoid steel

Answer 40

C. Hyper-eutectoid steel

Answer 41

D. Eutectoid steel

Answer 42

B. Elastic

Answer 43

C. Ductile

Answer 44

D. Brittle

Answer 45

A. Cast iron

Answer 46

C. Concrete

Answer 47

D. Plastic

Answer 48

A. Concentration

Answer 49

B. Velocity

Answer 50

C. Temperature

Answer 51

D. None of these

Answer 52

A. pH value

Answer 53

B. Electrode potential

Answer 54

C. Colour intensity

Answer 55

D. None of these

Answer 56

A. Decarburising

Answer 57

B. Alloying with cobalt

Answer 58

C. Purification

Answer 59

D. Alternate heating & cooling

Answer 60

A. Lower melting temperature

Answer 61

B. Same melting temperature

Answer 62

C. Same composition

Answer 63

D. Both 'b' & 'c'

Answer 64

A. Make the plate softer

Answer 65

B. Burn oil & grease sticking to plate surfaces

Answer 66

C. Avoid plate distortion

Answer 67

D. Prevent cold cracks

Answer 68

A. Increases

Answer 69

B. Decreases

Answer 70

C. Remain constant

Answer 71

D. Either (A) or (B), depends on the type of semi-conductor

Answer 72

A. Polystyrene

Answer 73

B. Melamine

Answer 74

C. Polystyrene

Answer 75

D. Polyurethane

Answer 76

A. Increases

Answer 77

B. Decreases

Answer 78

C. Remain constant

Answer 79

D. Increases to a maximum before decreasing

Answer 80

A. Without melting the base metal

Answer 81

B. With a non-ferrous filler

Answer 82

C. Both (A) & (B)

Answer 83

D. Neither (A) nor (B)

Answer 84

A. Ductile & resistant to corrosion/rusting

Answer 85

B. Weldable easily

Answer 86

C. Having uniform strength in all directions

Answer 87

D. Having maximum tensile strength along the lines of slag distribution

Answer 88

A. Lead can creep under its own weight at room temperature

Answer 89

B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement

Answer 90

C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal

Answer 91

D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

Answer 92

A. Nitrogen oxides

Answer 93

B. Hydrocarbons

Answer 94

C. Both 'a' & 'b'

Answer 95

D. Carbon monoxide

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Pick out the wrong statement.

Case hardening is not done by

Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about

X-rays are

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.

Atomic __________ is a whole number for an element.

Normalising does not __________ of a metal.

For preparation of porous bearings by powder metallurgy, preferred particle shape is

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

Thermit welding is categorised as the __________ welding.

Cast iron contains __________ percent carbon.

Shaft/rotor speed is most accurately measured by a

An alloy of Fe - 0.4 % C is

Fibrous fracture is normally encountered in the __________ materials.

Lead is poured into the joints between two __________ pipes.

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

Colour comparator is used to measure the

Magnetic permeability of iron is increased by its

Filler material used in welding should have __________ as compared to the parent metal to be welded.

Preheating before welding is done to

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

In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?

With increase in temperature, the electrical conductivity of semiconductors

Unbreakable crockeries are made from __________ polymers.

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

Brazing is the joining of metals

Wrought iron is not

Pick out the wrong statement.

Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?

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