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

Question

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

A. 8

B. 35

C. 65

D. 80

Correct Answer :

B. 35

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The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

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The leaching solvent used in Baeyer's process for the purification of bauxite is

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Lead pencil contains

C. Lead

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The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system

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With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

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Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.

A. 80-120

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Adhesives

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The trace metal present in insulin is

A. Cu

B. Zn

C. Fe

D. Ni

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Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

Discuss this answer

In chemical dehumidification process

Discuss this answer

Preheating before welding is done to

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Property responsible for the talcum powder to cling to the skin is the

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The rolling process cannot be used to produce

A. Plates

B. Rods

C. Tubes

D. Wires

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Friction factor for fluid flow in pipe does not depend upon the

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Highest cutting speed is achieved by the __________ tool material.

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The 'laughing gas' is

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Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

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What is the value of entropy at 273°K?

A. 0

B. 1

C. ∞

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__________ is the most important element, which controls the physical properties of steel.

C. Carbon

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at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of at 1173 K?

A. 1.0

B. 1.3

C. 2.3

D. 3.3

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Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

A. Nickel

B. Cobalt

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A pycnometer is used for the measurement of

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The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

Discuss this answer

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

A. 7

B. 10

C. 12

D. 17

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Unit of viscosity in CGS system is

A.

B.

C.

D.

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Cast iron contains __________ percent carbon.

A. 2.5

B. 3.75

C. 4.75

D. 5.25

Discuss this answer

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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Which one can be directly solidified from gaseous state without entering into liquid state?

A. Helium

B. Oxygen

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Steel balls are manufactured by

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'Ice point' is designated on Fahrenheit temperature scale by

A. 0°

B. 32°

C. 62°

D. 212°

Discuss this answer

Answer 1

A. Decreasing the surface area of the electrodes

Answer 2

B. Increasing the concentration of zinc sulphate solution

Answer 3

C. Increasing the surface area of the electrodes

Answer 4

D. Increasing the concentration of copper sulphate solution

Answer 5

A. Ammonium hydroxide

Answer 6

B. Sodium carbonate

Answer 7

C. Sodium hydroxide

Answer 8

D. Ammonium carbonate

Answer 9

A. Graphite

Answer 10

B. Lead sulphide

Answer 11

D. Both (B) & (C)

Answer 12

A. Is as light as possible

Answer 13

B. Has very high C.O.P.

Answer 14

C. Employs minimum quantity of refrigerant

Answer 15

D. Consumer minimum horse power

Answer 16

A. Supercharging

Answer 17

B. Wall temperature

Answer 18

C. Compression ratio

Answer 19

D. Engine speed

Answer 20

B. 200-300

Answer 21

C. 600-800

Answer 22

D. 1000-1100

Answer 23

A. Cant be used in the form of pressure sensitive tapes

Answer 24

B. Cant join two dissimilar metals

Answer 25

C. Cure instantaneously after application on a surface

Answer 26

D. None of these

Answer 27

A. Parallel flow with equal heat capacities

Answer 28

B. Counter flow with equal heat capacities

Answer 29

C. Counter flow with unequal heat capacities

Answer 30

D. Parallel flow with unequal heat capacities

Answer 31

A. Wet bulb temperature increases

Answer 32

B. Dry bulb temperature remains constant

Answer 33

C. Dew point temperature increases

Answer 34

D. Dry bulb temperature increases

Answer 35

A. Make the plate softer

Answer 36

B. Burn oil & grease sticking to plate surfaces

Answer 37

C. Avoid plate distortion

Answer 38

D. Prevent cold cracks

Answer 39

A. Capillary action

Answer 40

B. Adhesion

Answer 41

C. Cohesion

Answer 42

D. Surface tension

Answer 43

A. Pipe length

Answer 44

B. Pipe roughness

Answer 45

C. Fluid density & viscosity

Answer 46

D. Mass flow rate of fluid

Answer 47

A. High speed steel

Answer 48

B. Carbide

Answer 49

C. Cast alloy

Answer 50

D. Plain carbon steel

Answer 51

A. Nitrous oxide

Answer 52

B. Nitric oxide

Answer 53

C. Nitrogen trioxide

Answer 54

D. Nitrogen pentoxide

Answer 55

A. Hexagonal close, packed (hcp)

Answer 56

B. Face centred cubic (fcc)

Answer 57

C. Body centred cubic (bcc)

Answer 58

D. Simple cubic

Answer 59

D. None of these

Answer 60

A. Manganese

Answer 61

B. Silicon

Answer 62

D. Vanadium

Answer 63

C. Vanadium

Answer 64

D. Platinum

Answer 65

A. Flow rate of molten metal

Answer 66

B. Specific gravity of a liquid

Answer 67

C. Composition of alloys

Answer 68

D. Concentration of a solution

Answer 69

A. 3171P_a

Answer 70

B. 3567P_a

Answer 71

C. 1.01 × 10⁵P_a

Answer 72

D. 5000P_a

Answer 73

C. Carbon dioxide

Answer 74

D. None of these

Answer 75

A. Sintering

Answer 76

B. Casting

Answer 77

C. Cold heading

Answer 78

D. Spinning

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

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The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

The leaching solvent used in Baeyer's process for the purification of bauxite is

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With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

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at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of at 1173 K?

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

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The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

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Cast iron contains __________ percent carbon.

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

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'Ice point' is designated on Fahrenheit temperature scale by

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

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The leaching solvent used in Baeyer's process for the purification of bauxite is

Lead pencil contains

The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system

With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.

Adhesives

The trace metal present in insulin is

Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

In chemical dehumidification process

Preheating before welding is done to

Property responsible for the talcum powder to cling to the skin is the

The rolling process cannot be used to produce

Friction factor for fluid flow in pipe does not depend upon the

Highest cutting speed is achieved by the __________ tool material.

The 'laughing gas' is

Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

What is the value of entropy at 273°K?

__________ is the most important element, which controls the physical properties of steel.

at 1173E; at equilibrium, what will be the number of moles of CO gas required to reduce one mole of at 1173 K?

Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is

A pycnometer is used for the measurement of

The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

Unit of viscosity in CGS system is

Cast iron contains __________ percent carbon.

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

Which one can be directly solidified from gaseous state without entering into liquid state?

Steel balls are manufactured by

'Ice point' is designated on Fahrenheit temperature scale by

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The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by

The fugacity of liquid water at 298 K is approximately 3171 P_a. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be