The majority charge carriers in p-type silicon are

Question

The majority charge carriers in p-type silicon are

B. Ions

D. Holes

Correct Answer :

D. Holes

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Cupola produces __________ iron.

A. Pig

B. Cast

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The majority charge carriers in p-type silicon are

B. Ions

D. Holes

Discuss this answer

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Discuss this answer

Gratings is associated with the measurement of

Discuss this answer

Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

Discuss this answer

The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

A.

B.

C.

D.

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Discuss this answer

Methyl orange indicator turns

Discuss this answer

Steel & cast iron pipes are produced by __________ casting.

A. Slush

B. Die

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Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A. 1/k

B. k

C. k²

D. 1/k²

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A. Length

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Which of the following materials has the least scrap value?

C. Brass

D. Copper

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Natural water contains approximately __________ percent of heavy water.

A. 0.015

B. 0.71

C. 1.2

D. 3.5

Discuss this answer

Closeness of packing is maximum in case of __________ crystal lattice.

Discuss this answer

Function of fusible plug in a boiler is to

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Unbreakable crockeries are made from __________ polymers.

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Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Discuss this answer

Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of

A. Paper

B. Cloth

C. Lead

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Encyclopaedia of Chemical Technology has been

Discuss this answer

For efficient performance of a blast furnace, the extent of reduction of Wustite (F_eO) should be

Discuss this answer

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

Discuss this answer

Pick out the wrong statement about nucleate boiling.

Discuss this answer

Vernier calipers cannot be used to measure the

Discuss this answer

In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

Discuss this answer

Pick out the wrong statement.

Discuss this answer

Broaching tools are usually made of

Discuss this answer

The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.

A. Hard

B. Soft

Discuss this answer

Answer 1

A. Free electrons

Answer 2

C. Conduction electrons

Answer 3

C. Wrought

Answer 4

D. Carbon free

Answer 5

A. High fusibility & fluidity

Answer 6

B. High thermal conductivity

Answer 7

C. Low density

Answer 8

D. High chemical activity

Answer 9

A. Nickel, cobalt & chromium

Answer 10

B. Tungsten, chromium & cobalt

Answer 11

C. Manganese, chromium & cobalt

Answer 12

D. Tungsten, molybdenum & nickel

Answer 13

A. Free electrons

Answer 14

C. Conduction electrons

Answer 15

A. 0.7-1.0

Answer 16

B. 1.1-1.4

Answer 17

C. 1.5 - 1.8

Answer 18

D. 2.0 - 2.5

Answer 19

A. Linear displacement

Answer 20

B. Concavity/convexity

Answer 21

C. Surface texture

Answer 22

D. Flatness

Answer 23

A. Diminishing balance

Answer 24

B. Sinking fund

Answer 25

C. Multiple straight line

Answer 26

D. Sum of the years digit

Answer 27

A. Thermal power

Answer 28

B. Hydroelectric power

Answer 29

C. Nuclear-fusion power

Answer 30

D. Solar power

Answer 31

A. Orange yellow in alkaline medium

Answer 32

B. Orange yellow in acidic medium

Answer 33

C. Colourless in acidic medium

Answer 34

D. Colourless in basic medium

Answer 35

C. Investment

Answer 36

D. True centrifugal

Answer 37

B. Shank diameter

Answer 38

C. Head diameter

Answer 39

D. None of these

Answer 40

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

Answer 41

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

Answer 42

C. Useful to control flow from temperature

Answer 43

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

Answer 44

A. Aluminium

Answer 45

B. Stainless steel

Answer 46

A. Face centred

Answer 47

B. Simple cubic

Answer 48

C. Body centred

Answer 49

D. None of these

Answer 50

A. Drain out water and sludge from the boiler during repair

Answer 51

B. Put off fire in the furnace when water level in the boiler falls to unsafe limit

Answer 52

C. Guard the boiler in case of abnormal rise in steam pressure

Answer 53

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

Answer 54

A. Polystyrene

Answer 55

B. Melamine

Answer 56

C. Polystyrene

Answer 57

D. Polyurethane

Answer 58

A. Retained austenite

Answer 59

B. Martensite formation

Answer 60

C. Relatively high sulphur content in the base metal

Answer 61

D. Sufficient hydrogen present in the welding arc

Answer 62

D. Aluminium

Answer 63

A. Authored by Kirk Othmer

Answer 64

B. Edited by Perry and Chilton

Answer 65

C. Edited by Kirk Othmer

Answer 66

D. Authored by Perry and Chilton

Answer 67

A. 100% indirect reduction

Answer 68

B. 100% direct reduction

Answer 69

C. 50-60% indirect reduction

Answer 70

D. 30-40% indirect reduction

Answer 71

A. Scratch

Answer 72

B. Indentation

Answer 73

C. Dynamic

Answer 74

D. Rebound

Answer 75

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface

Answer 76

B. Surface temperature is greater than the saturation temperature of the liquid

Answer 77

C. Heat transfer from the surface of the liquid is less than that in film boiling

Answer 78

D. The temperature is less than that of film boiling

Answer 79

A. I.D. & O.D. of the shaft

Answer 80

B. Thickness of parts

Answer 81

C. Depth of holes

Answer 82

D. Clearance between two mating surfaces

Answer 83

A. t = 15 - 0.0065 h

Answer 84

B. t = 15 + 0.0065 h

Answer 85

C. t = 0.0035 h - 15

Answer 86

D. t = 15 - 0.0035 h

Answer 87

A. Cold cracking of a weld is due to the presence of hydrogen gas in the weld

Answer 88

B. True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively

Answer 89

C. Phosphorous can be easily recovered in the iron blast furnace

Answer 90

D. High residual stress at the surface is beneficial for fatigue properties of a material

Answer 91

A. Cermets

Answer 92

B. High speed steel

Answer 93

C. Tungsten carbide

Answer 94

D. Stellite

Answer 95

C. Silicon carbide

Answer 96

D. Aluminium oxide

The majority charge carriers in p-type silicon are

Correct Answer :

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Also checkout

The majority charge carriers in p-type silicon are

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Cupola produces __________ iron.

Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore?

Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are:

The majority charge carriers in p-type silicon are

Basicity of the slag in Indian blast furnace is in the range of

Gratings is associated with the measurement of

Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.

The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

Which of the following is an unconventional source of energy?

Methyl orange indicator turns

Steel & cast iron pipes are produced by __________ casting.

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Resilience of a bolt can be increased by increasing its

Cascade control is

Which of the following materials has the least scrap value?

Natural water contains approximately __________ percent of heavy water.

Closeness of packing is maximum in case of __________ crystal lattice.

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Unbreakable crockeries are made from __________ polymers.

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

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In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)

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