Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

Question

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach

B. Froude

D. Euler

Correct Answer :

A. Mach

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Water-tube boiler is the one, in which

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Dryness fraction of dry steam is

A. 0

B. ∞

C. 1

D. 0.5

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The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm².

A. 273.15

B. 225.65

C. 100.03

D. 373.15

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In TIG welding, thoriated tungsten electrodes are used, because it

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Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

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The normal stress is the same in all directions at a point in a fluid, only when the fluid

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Air-petrol ratio for maximum power generation in spark ignition engine is about

A. 6 : 1

B. 12 : 1

C. 18 : 1

D. 24 : 1

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Pick out the wrong statement.

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The most abundant metal present in the earth's crust is;

A. Iron

B. Copper

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__________ cannot increase the fatigue strength of a material.

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In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

Discuss this answer

Case hardening of a material is

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Chlorine acts as a bleaching agent only in the presence of

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When an isolated thermodynamic system executes a process,

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Which of the following is not an explosive?

A. TNT

B. CMC

C. RDX

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Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

A. 15

B. 25

C. 10

D. 30

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The 'laughing gas' is

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Dry saturated steam can be converted into superheated steam by

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__________ test is the appropriate test to determine whether a material is ductile or brittle.

A. Impact

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Reduction in the grain size reduces the __________ of the material.

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

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Work study deals with the __________ study.

A. Time

B. Motion

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Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

A. +4000

B. -4000

C. 10000

D. -10000

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The difference between gross & net calorific values of fuel is due to the

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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

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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

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Drossing is a __________ operation.

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Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

C. Slip

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The noble metals

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Name the safety device used to protect the boiler, when the water level falls below a minimum level.

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Answer 1

C. Reynolds

Answer 2

A. Water passes through tubes and flue gases around it

Answer 3

B. Tube carrying hot flue gases are immersed in a pool of water

Answer 4

C. Tubes are placed in vertical position

Answer 5

D. None of these

Answer 6

A. Has higher current carrying capacity

Answer 7

B. Has better electron emissivity

Answer 8

C. Is stronger than ordinary tungsten

Answer 9

D. Is easy to prepare

Answer 10

A. Manganese

Answer 11

B. Phosphorous

Answer 12

C. Magnesium

Answer 13

D. Chromium

Answer 14

A. Is at rest & has zero viscosity

Answer 15

B. Is frictionless

Answer 16

C. Fluid layer has no motion relative to an adjacent layer of fluid

Answer 17

D. is incompressible & frictionless

Answer 18

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

Answer 19

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

Answer 20

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

Answer 21

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

Answer 22

C. Titanium

Answer 23

D. Aluminium

Answer 24

A. Grain refining

Answer 25

B. Grain coarsening

Answer 26

C. Surface hardening

Answer 27

D. Shot peening

Answer 28

A. Mechanical

Answer 29

B. Overall

Answer 30

C. Volumetric

Answer 31

D. Impeller

Answer 32

A. Followed by tempering or carburising

Answer 33

B. Preceded by its tempering

Answer 34

C. Done to get a soft ductile interior with a very hard surface

Answer 35

D. Carried out to get extreme hardness in its core

Answer 36

A. Dry air

Answer 37

B. Pure oxygen

Answer 38

C. Moisture

Answer 39

D. Sunlight

Answer 40

A. Work is done

Answer 41

B. Heat transfer takes place

Answer 42

C. Mass flow occurs across the boundary of the system

Answer 43

D. No chemical reaction takes place within the system

Answer 44

D. Lead azide

Answer 45

A. Nitrous oxide

Answer 46

B. Nitric oxide

Answer 47

C. Nitrogen trioxide

Answer 48

D. Nitrogen pentoxide

Answer 49

A. Increasing its cross-sectional area of flow

Answer 50

B. Passing it through a pressure reducing valve

Answer 51

C. Forcing it downwards through a vertical tube

Answer 52

D. None of these

Answer 53

B. Cupping

Answer 54

C. Hardness

Answer 55

D. Tensile

Answer 56

A. Fatigue resistance

Answer 57

B. Tensile strength

Answer 58

C. Creep resistance

Answer 59

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

Answer 60

A. Stretchability

Answer 61

B. Drawability

Answer 62

C. Bendability

Answer 63

D. None of these

Answer 64

C. Both (A) & (B)

Answer 65

D. Neither (A) nor (B)

Answer 66

A. Sensible heat carried away by the flue gases

Answer 67

B. Heat carried away by the steam from the moisture content of the fuel

Answer 68

C. Heat lost by radiation

Answer 69

D. Heat carried away by steam from the combustion of hydrogen in the fuel

Answer 70

D. Unpredictable

Answer 71

A. Smelting

Answer 72

B. Dressing

Answer 73

C. Roasting

Answer 74

D. Dressing

Answer 75

A. Fracture

Answer 76

B. Dislocation

Answer 77

D. Twinning

Answer 78

A. Are exemplified by Na, K and Li

Answer 79

B. Do not resist corrosion very strongly

Answer 80

C. Are the lowermost in the electro-chemical series of metals

Answer 81

D. None of these

Answer 82

A. Blow down valve

Answer 83

B. Blow off cock

Answer 84

C. Fusible plug

Answer 85

D. Safety valve

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Water-tube boiler is the one, in which

Dryness fraction of dry steam is

The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm².

In TIG welding, thoriated tungsten electrodes are used, because it

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Air-petrol ratio for maximum power generation in spark ignition engine is about

Pick out the wrong statement.

The most abundant metal present in the earth's crust is;

__________ cannot increase the fatigue strength of a material.

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

Case hardening of a material is

Chlorine acts as a bleaching agent only in the presence of

When an isolated thermodynamic system executes a process,

Which of the following is not an explosive?

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

The 'laughing gas' is

Dry saturated steam can be converted into superheated steam by

__________ test is the appropriate test to determine whether a material is ductile or brittle.

Reduction in the grain size reduces the __________ of the material.

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

Work study deals with the __________ study.

Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

The difference between gross & net calorific values of fuel is due to the

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

Drossing is a __________ operation.

Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

The noble metals

Name the safety device used to protect the boiler, when the water level falls below a minimum level.

Also checkout

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Water-tube boiler is the one, in which

Dryness fraction of dry steam is

The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.

In TIG welding, thoriated tungsten electrodes are used, because it

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Air-petrol ratio for maximum power generation in spark ignition engine is about

Pick out the wrong statement.

The most abundant metal present in the earth's crust is;

__________ cannot increase the fatigue strength of a material.

In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).

Case hardening of a material is

Chlorine acts as a bleaching agent only in the presence of

When an isolated thermodynamic system executes a process,

Which of the following is not an explosive?

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.

The 'laughing gas' is

Dry saturated steam can be converted into superheated steam by

__________ test is the appropriate test to determine whether a material is ductile or brittle.

Reduction in the grain size reduces the __________ of the material.

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

Work study deals with the __________ study.

Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

The difference between gross & net calorific values of fuel is due to the

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

Drossing is a __________ operation.

Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.

The noble metals

Name the safety device used to protect the boiler, when the water level falls below a minimum level.

Also checkout

The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm².

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.