Which of the following rays has the least wavelength?

Question

Which of the following rays has the least wavelength?

A. Ultraviolet rays

B. Infrared rays

C. Cosmic rays

D. X-rays

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Fatigue resistance of a material is measured by the

A. Elastic limit

B. Ultimate tensile strength

C. Young's modulus

D. Endurance limit

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Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

A. 10 atm-1

B. 105 atm-1

C. 10 (dimensionless)

D. 105 (dimensionless)

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A jig is used while __________ a hole.

A. Boring

B. Counter boring

C. Drilling

D. Enlarging

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Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

A. 9 : 1

B. 17 : 1

C. 23 : 1

D. 29 : 1

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Pick out the wrong statement.

A. The X-rays cannot be deflected by electric field unlike cathode rays

B. The intensity of X-rays can be measured by ionisation current produced due to the ionisation of gas by X-rays

C. The quality of X-rays can be controlled by varying the anode-cathode voltage

D. Crystal structure of a material can be studied by an electron microscope

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The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

A. Water alkalinity & leakage

B. Hydrazine addition during feed water treatment

C. Release of non-condensable gas from water in the boiler

D. Scale formation

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The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

A. Fatigue strength

B. Creep strength

C. Resilience

D. Endurance limit

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Addition of silicon to cast iron

A. Promotes graphite module formation

B. Improves its ductility

C. Does not promote graphite flakes formation

D. Increases the fluidity of molten metal

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Steel is welded using the __________ flame.

A. Carburising

B. Neutral

C. Oxidising

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

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Tesla metre per ampere (T. m/A) is the unit for the measurement of

A. Magnetic susceptibility

B. Magnetic moment

C. Permeability of free space

D. Flux density

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Which of the following fastening devices has its both ends threaded?

A. Bolt

B. Stud

C. Set screw

D. Split nut

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Blow off cock is provided in steam boiler to

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

B. Drain out water and sludge during its repair

C. Regulate the supply of water in boiler

D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit

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Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.

A. Decreases

B. Increases

C. Remain same

D. May increase or decrease

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

A. Dew point

B. Dry bulb

C. Wet bulb

D. None of these

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Multistage compression of air as compared to single stage compression offers the advantage of

A. Power saving per unit weight of air delivered

B. Moisture elimination in the inter-stage cooler

C. Increased volumetric efficiency

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

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Chromium molybdenum steel cannot be welded using __________ welding.

A. Thermit

B. Electrical resistance

C. Oxy-acetylene

D. Any of these

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Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.

A. 723

B. 959

C. 1147

D. 1493

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An ideal material for making cooking vessels should have

A. High heat capacity

B. Low heat capacity

C. High thermal conductivity

D. Both (B) and (C)

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Which of the following can be manufactured using powder metallurgy techniques?

A. Brake linings

B. Bearings

C. Carbide tool tips

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

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The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

A. Runner

B. Cylinder

C. Mold

D. None of these

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Annealing of cast iron

A. Softens it to facilitate machining

B. Decreases the free carbon

C. Increases the strength

D. None of these

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The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

A. Red

B. Extended

C. Super

D. Extreme

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

A. Diminishing balance

B. Sinking fund

C. Multiple straight line

D. Sum of the years digit

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M10 index of coke indicates its

A. Compressive strength

B. Hardness

C. Abrasion resistance

D. Impact strength

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For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

A. 30,000 J

B. 60,000 J

C. 90,000 J

D. 2,40,000 J

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Earing is a defect found in steels after the following metal working operation.

A. Extrusion

B. Rolling

C. Deep drawing

D. Wire drawing

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

A. Capillary action

B. Adhesion

C. Cohesion

D. Surface tension

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Unbreakable crockeries are made from __________ polymers.

A. Polystyrene

B. Melamine

C. Polystyrene

D. Polyurethane

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

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

B. Is exemplified by magnesium plate

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

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

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At the point of boundary layer separation in fluid flow, the

A. Shear stress is maximum

B. Velocity gradient is flat

C. Density variation is maximum

D. Shear stress is zero

Discuss this answer

Accepted Answer

C. Cosmic rays

Which of the following rays has the least wavelength?

Correct Answer :

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Related Questions

Fatigue resistance of a material is measured by the

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

A jig is used while __________ a hole.

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

Pick out the wrong statement.

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

Addition of silicon to cast iron

Steel is welded using the __________ flame.

Tesla metre per ampere (T. m/A) is the unit for the measurement of

Which of the following fastening devices has its both ends threaded?

Blow off cock is provided in steam boiler to

Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.

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

Multistage compression of air as compared to single stage compression offers the advantage of

Chromium molybdenum steel cannot be welded using __________ welding.

Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.

An ideal material for making cooking vessels should have

Which of the following can be manufactured using powder metallurgy techniques?

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

Annealing of cast iron

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

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

M10 index of coke indicates its

For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

Earing is a defect found in steels after the following metal working operation.

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

Unbreakable crockeries are made from __________ polymers.

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

At the point of boundary layer separation in fluid flow, the

Also checkout

Which of the following rays has the least wavelength?

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Fatigue resistance of a material is measured by the

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

A jig is used while __________ a hole.

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

Pick out the wrong statement.

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

Addition of silicon to cast iron

Steel is welded using the __________ flame.

Tesla metre per ampere (T. m/A) is the unit for the measurement of

Which of the following fastening devices has its both ends threaded?

Blow off cock is provided in steam boiler to

Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the pressure of steam.

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

Multistage compression of air as compared to single stage compression offers the advantage of

Chromium molybdenum steel cannot be welded using __________ welding.

Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.

An ideal material for making cooking vessels should have

Which of the following can be manufactured using powder metallurgy techniques?

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

Annealing of cast iron

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

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

M10 index of coke indicates its

For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

Earing is a defect found in steels after the following metal working operation.

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

Unbreakable crockeries are made from __________ polymers.

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

At the point of boundary layer separation in fluid flow, the

Also checkout

For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be