Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Question

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

A. 5

B. 10

C. 20

D. 35

Correct Answer :

C. 20

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A psychrometer does not measure the __________ temperature of moist air.

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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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Stresses encountered in the metal forming processes are less than the __________ of the material.

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Out of the following, the most malleable material is

A. Copper

D. Lead

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An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.

Discuss this answer

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Discuss this answer

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

Discuss this answer

Joule-Thomson co-efficient is the ratio of

Discuss this answer

Boiler tube size is specified by its thickness and __________ diameter.

B. Inside

C. Mean

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The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)

A. 2300 J

B. 4600 J

C. 230 J

Discuss this answer

Direct conversion of thermal energy to electrical energy is facilitated by the

Discuss this answer

Which of the following is not a dielectric material?

Discuss this answer

Lead pencil contains

C. Lead

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Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

A. 5

B. 1.25

C. 2.5

D. 3.75

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

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Which of the following has the highest value of refractive index?

D. Glass

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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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Addition of __________ to steel does not impart hardness.

A. Nickel

B. Copper

Discuss this answer

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

A. 0.5

B. 3

C. 10

D. 25

Discuss this answer

Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

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The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

Discuss this answer

Joining of thin foils is preferred to be done by

B. X-rays

Discuss this answer

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

A. Same

Discuss this answer

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

Discuss this answer

Carbon is present in the form of __________ in grey cast iron.

C. Flakes

Discuss this answer

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

A. Less

B. More

C. Equal

Discuss this answer

Pick out the correct statement.

Discuss this answer

Moist climate is the most favourable factor in the site selection far a

Discuss this answer

Basic open hearth furnace (BOF) is not used for producing __________ steel.

A. Killed

Discuss this answer

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

Discuss this answer

Answer 1

A. Dew point

Answer 2

B. Dry bulb

Answer 3

C. Wet bulb

Answer 4

D. None of these

Answer 5

A. Fracture strength

Answer 6

B. Yield strength

Answer 7

C. Elastic limit

Answer 8

D. Limit of proportionality

Answer 9

B. Aluminium

Answer 10

C. Wrought iron

Answer 11

A. Adiabatic

Answer 12

B. Isothermal

Answer 13

C. Isentropic

Answer 14

D. Isochoric

Answer 15

A. Linearly

Answer 16

B. Exponentially

Answer 17

C. Logarithmically

Answer 18

D. Inversely

Answer 19

A. Occurs higher in the electro-chemical series of metals

Answer 20

B. Is exemplified by magnesium plate

Answer 21

C. Is much cheaper than the cathodic base material to be guarded against corrosion

Answer 22

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

Answer 23

A. Pressure change to temperature change occuring during adiabatic compression of a gas

Answer 24

B. Pressure change to temperature change occuring during adiabatic throttling of a gas

Answer 25

C. Temperature change to pressure change occuring during adiabatic compression of a gas

Answer 26

D. Temperature change to pressure change occuring during adiabatic throttling of a gas

Answer 27

A. Outside

Answer 28

D. None of these

Answer 29

D. 2.3 × 10⁶ J

Answer 30

A. Fuel cells

Answer 31

B. Photo voltaic cell

Answer 32

C. Magneto hydrodynamic generator

Answer 33

D. None of these

Answer 34

A. Cotton, silk and paper

Answer 35

B. Asbestos, glass, porcelain and mica

Answer 36

C. Rubber and polymeric resins

Answer 37

D. All refractory materials

Answer 38

A. Graphite

Answer 39

B. Lead sulphide

Answer 40

D. Both (B) & (C)

Answer 41

A. Less than the wet bulb temperature

Answer 42

B. More than the wet bulb temperature

Answer 43

C. Equal to the wet bulb temperature

Answer 44

D. Equal to the ambient temperature

Answer 45

A. Brine (sea water)

Answer 46

B. Diamond

Answer 47

C. Distilled water

Answer 48

C. Chromium

Answer 49

D. Silicon

Answer 50

A. Radiation

Answer 51

B. Conduction

Answer 52

C. Convection

Answer 53

D. Both (B) & (C)

Answer 54

A. 7 and 30

Answer 55

B. 10 and 50

Answer 56

C. 2 and 50

Answer 57

D. 13 and 55

Answer 58

A. Gamma rays

Answer 59

C. Microwaves

Answer 60

D. Gas welding

Answer 61

B. Slightly less

Answer 62

C. Slightly more

Answer 63

D. Much more

Answer 64

A. Retained austenite

Answer 65

B. Martensite formation

Answer 66

C. Relatively high sulphur content in the base metal

Answer 67

D. Sufficient hydrogen present in the welding arc

Answer 68

A. Spheroids

Answer 69

B. Nodular aggregates of graphite

Answer 70

D. Cementite

Answer 71

D. Unpredictable

Answer 72

A. Materials exhibiting high elasticity obey Hooke's law

Answer 73

B. The elastic behaviour of rubber under compression is the same as its behaviour under tension

Answer 74

C. The damping capacity of a material is due to its plastic deformation

Answer 75

D. The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations

Answer 76

A. Steel plant

Answer 77

B. Textile factory

Answer 78

C. Petroleum refinery

Answer 79

D. Coke oven battery

Answer 80

B. Rimming

Answer 81

C. High alloy

Answer 82

D. None of these

Answer 83

A. Cementite

Answer 84

B. Austenite

Answer 85

C. Martensite

Answer 86

D. Pearlite

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

A psychrometer does not measure the __________ temperature of moist air.

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

Stresses encountered in the metal forming processes are less than the __________ of the material.

Out of the following, the most malleable material is

An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

Joule-Thomson co-efficient is the ratio of

Boiler tube size is specified by its thickness and __________ diameter.

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)

Direct conversion of thermal energy to electrical energy is facilitated by the

Which of the following is not a dielectric material?

Lead pencil contains

Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

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

Which of the following has the highest value of refractive index?

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

Addition of __________ to steel does not impart hardness.

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

Joining of thin foils is preferred to be done by

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

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

Carbon is present in the form of __________ in grey cast iron.

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

Pick out the correct statement.

Moist climate is the most favourable factor in the site selection far a

Basic open hearth furnace (BOF) is not used for producing __________ steel.

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

Also checkout

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

A psychrometer does not measure the __________ temperature of moist air.

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

Stresses encountered in the metal forming processes are less than the __________ of the material.

Out of the following, the most malleable material is

An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

Joule-Thomson co-efficient is the ratio of

Boiler tube size is specified by its thickness and __________ diameter.

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1)

Direct conversion of thermal energy to electrical energy is facilitated by the

Which of the following is not a dielectric material?

Lead pencil contains

Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be

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

Which of the following has the highest value of refractive index?

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

Addition of __________ to steel does not impart hardness.

The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.

Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively

Joining of thin foils is preferred to be done by

The delivery pressure of boiler feed water pump compared to the boiler steam pressure is

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

Carbon is present in the form of __________ in grey cast iron.

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

Pick out the correct statement.

Moist climate is the most favourable factor in the site selection far a

Basic open hearth furnace (BOF) is not used for producing __________ steel.

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

Also checkout

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : C_p of copper is 23 J K^-1mole^-1)