A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

Question

A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

A. 50

B. 100

C. 150

D. 200

Correct Answer :

B. 100

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Yield strength of a material is determined by the __________ test.

A. Creep

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Which of the following is preferred for riveting?

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Good design of the casing of a centrifugal pump aims at minimising the

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Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

A. Cold

B. Work

C. Age

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The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

A. Two

B. Four

C. Six

D. Eight

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__________ test can be termed as the semidestructive test.

A. Impact

D. Charpy

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Thermal efficiency of an internal combustion engine is around __________ percent.

A. 8

B. 35

C. 65

D. 80

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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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Hydro-cyclone is a

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'Ice point' is designated on Fahrenheit temperature scale by

A. 0°

B. 32°

C. 62°

D. 212°

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A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient.

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Compressed dry air is used as the cutting fluid, while machining

A. Steel

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Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

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

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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

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

B. Lucite

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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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A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

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Silicon crystal can be converted to p-type semiconductor by doping with

C. Carbon

D. Boron

Discuss this answer

A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is

A. Lead

B. Glass

C. Mica

D. Silver

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

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The swift cup test evaluates the following property of a sheet metal.

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

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Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

A. More

B. Less

C. Same

Discuss this answer

The surface tension of a liquid, at critical temperature is

B. Zero

Discuss this answer

Shampoos are commercially not available in the form of

A. Powder

Discuss this answer

Which of the following is the most wear resistant grade of carbide used for the cutting tools?

Discuss this answer

Answer 1

A. Number of electrons

Answer 2

B. Oxidation number

Answer 3

C. Number of ions

Answer 4

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

Answer 5

A. Induce stresses in it

Answer 6

B. Refine its grain structure

Answer 7

C. Reduce segregation

Answer 8

D. Improve its mechanical properties

Answer 9

B. Tension

Answer 10

C. Compression

Answer 11

D. Endurance

Answer 12

A. Lap joint

Answer 13

B. Butt joint

Answer 14

C. Either (A) or (B)

Answer 15

D. Neither (A) nor (B)

Answer 16

A. Cavitation

Answer 17

B. Frictional losses

Answer 18

C. Kinetic energy loss

Answer 19

D. Static head

Answer 20

D. Induction

Answer 21

A. Pressure & temperature

Answer 22

B. Pressure & specific volume

Answer 23

C. Temperature & specific volume

Answer 24

D. Temperature only

Answer 25

B. Torsion

Answer 26

C. Hardness

Answer 27

D. Aluminium

Answer 28

A. Crusher

Answer 29

B. wet classifier

Answer 30

C. Dry classifier

Answer 31

D. Magnetic separator

Answer 32

A. Independent of

Answer 33

B. Inversely proportional to

Answer 34

C. Directly proportional to

Answer 35

D. None of these

Answer 36

B. Cast iron

Answer 37

C. Aluminium

Answer 38

D. None of these

Answer 39

A. Burning

Answer 40

B. Intensive oxidation

Answer 41

C. Evaporation

Answer 42

D. None of these

Answer 43

A. Spherical

Answer 44

B. Nodular

Answer 45

C. Irregular

Answer 46

D. No preferred shape

Answer 47

A. Wetness

Answer 48

B. Mass flow rate

Answer 49

C. Both 'a' & 'b'

Answer 50

D. Neither 'a' nor 'b'

Answer 51

A. Styrofoam

Answer 52

C. Perspex

Answer 53

D. Plexiglass

Answer 54

A. Increase

Answer 55

B. Decrease

Answer 56

C. Remain unaffected

Answer 57

D. May increase or decrease; depends on the thickness of each layer

Answer 58

A. Phosphorous

Answer 59

B. Nitrogen

Answer 60

A. Plasticiser: increases the polymer strength

Answer 61

B. Heat stabiliser: increases the maximum service temperature

Answer 62

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

Answer 63

D. Lubricants: increases the flexibility of polymers

Answer 64

A. Stretchability

Answer 65

B. Drawability

Answer 66

C. Bendability

Answer 67

D. None of these

Answer 68

A. 0.7-1.0

Answer 69

B. 1.1-1.4

Answer 70

C. 1.5 - 1.8

Answer 71

D. 2.0 - 2.5

Answer 72

D. Either more or less; depends on the climatic conditions

Answer 73

A. Indeterminate

Answer 74

C. Infinity

Answer 75

D. Same as that at any other temperature

Answer 76

B. Gaseous mixture

Answer 77

C. Solution

Answer 78

D. Emulsion

Answer 79

A. Aluminium carbide

Answer 80

B. Tungsten carbide

Answer 81

C. Nickel carbide

Answer 82

D. Iron carbide

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

An oxidation process is accompanied with decrease in the

Normalising of a casting does not

Yield strength of a material is determined by the __________ test.

Which of the following is preferred for riveting?

Good design of the casing of a centrifugal pump aims at minimising the

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

Internal energy of a gas obeying Van-Der- Waals equation of state, [p + (a/v²)] (V - b) = RT, depends upon its

The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

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Compressed dry air is used as the cutting fluid, while machining

Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

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

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

A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

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A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is

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

The swift cup test evaluates the following property of a sheet metal.

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

Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

The surface tension of a liquid, at critical temperature is

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Which of the following is the most wear resistant grade of carbide used for the cutting tools?

Also checkout

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

An oxidation process is accompanied with decrease in the

Normalising of a casting does not

Yield strength of a material is determined by the __________ test.

Which of the following is preferred for riveting?

Good design of the casing of a centrifugal pump aims at minimising the

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

Internal energy of a gas obeying Van-Der- Waals equation of state, [p + (a/v2)] (V - b) = RT, depends upon its

The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

__________ test can be termed as the semidestructive test.

Thermal efficiency of an internal combustion engine is around __________ percent.

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

Hydro-cyclone is a

'Ice point' is designated on Fahrenheit temperature scale by

A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient.

Compressed dry air is used as the cutting fluid, while machining

Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.

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

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

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

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

A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will

Silicon crystal can be converted to p-type semiconductor by doping with

A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is

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

The swift cup test evaluates the following property of a sheet metal.

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

Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be

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Internal energy of a gas obeying Van-Der- Waals equation of state, [p + (a/v²)] (V - b) = RT, depends upon its