__________ cannot increase the fatigue strength of a material.

Question

__________ cannot increase the fatigue strength of a material.

A. Grain refining

B. Grain coarsening

C. Surface hardening

D. Shot peening

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In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

A. 20

B. 60

C. 120

D. ∞

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The hardenability of steel decreases with

A. Decrease in dislocation density

B. Increase in solutionising temperature

C. Increase in strength

D. Decrease in grain size

Discuss this answer

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

A. Wood's metal

B. Babbitt metal

C. Monel metal

D. Duralumin

Discuss this answer

The main constituent of bones is

A. CaF₂

B. Ca₃(PO₄)₂

C. CaCO₃

D. CaCl₂

Discuss this answer

Magnetic permeability of iron is increased by its

A. Decarburising

B. Alloying with cobalt

C. Purification

D. Alternate heating & cooling

Discuss this answer

Which of the following materials does not form adherent oxide film on surface?

A. Copper

B. Nickel

C. Aluminium

D. Gold & silver

Discuss this answer

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

A. Iron

B. Copper

C. Titanium

D. Aluminium

Discuss this answer

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

A. Critical

B. Breeder

C. Fertile

D. Heterogeneous

Discuss this answer

In inventory control theory, the economic order quantity (EOQ) is the

A. Lot size corresponding to break even analysis

B. Average level of inventory

C. Optimum lot size

D. None of these

Discuss this answer

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

Discuss this answer

Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost

A. Only

B. Plus variable cost

C. Plus overhead cost

D. Plus selling expenses

Discuss this answer

Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

A. SiO2

B. Al2O3

C. MnO2

D. P

Discuss this answer

Which of the following is used to produce draught in the locomotive boilers?

A. Chimney

B. Induced draught fan

C. Forced draught fan

D. Steam jet arrangement

Discuss this answer

The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.

A. Creep

B. Endurance

C. Fatigue

D. None of these

Discuss this answer

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

A. Air

B. Water

C. Mercury

D. Alcohol

Discuss this answer

Which of the, following is not associated with the functioning of a petrol engine?

A. Compression ignition system

B. Spark plug

C. Carburettor

D. Otto cycle

Discuss this answer

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

A. Spheroids

B. Nodular aggregates of graphite

C. Flakes

D. Cementite

Discuss this answer

Speisses is a mixture of the following:

A. Arsenides of heavy metals

B. Antimonides of heavy metals

C. Arsenides & antimonides of heavy metals

D. Iron, cobalt and nickel

Discuss this answer

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

A.

B.

C.

D.

Discuss this answer

Pick out the wrong statement.

A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'

B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials

C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces

D. Tungsten steel and alnico are not hard magnetic materials

Discuss this answer

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

A. Scratch

B. Indentation

C. Dynamic

D. Rebound

Discuss this answer

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

A. More

B. Less

C. Equal

D. Much more

Discuss this answer

According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.

A. 0.5

B. 2

C. √2

D. √3/2

Discuss this answer

Hydrogen can be

A. Used in I.C. engines as fuel

B. Liquefied & stored under cryogenic conditions

C. Produced by electrolysis of water

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

Discuss this answer

The refrigerant freon-12 is chemically

A. CCl₂F₂

B. CCl₃F

C. CClF₃

D. CCl₄F

Discuss this answer

Satellites burn off during re-entry to earth's atmosphere, because of the

A. Combustion with air

B. Gravitational pull by earth

C. Friction with earth's atmosphere

D. Loss in weight of the satellite

Discuss this answer

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

A. Specific fuel consumption is very low due to the use of heavy water

B. Fuel cost is much lower than that used in pressurised water or boiling water reactor

C. Heavy water is used both as coolant as well as moderator

D. Both 'b' & 'c'

Discuss this answer

Addition of __________ to steel does not impart hardness.

A. Nickel

B. Copper

C. Chromium

D. Silicon

Discuss this answer

Which of the following phenomenon will exhibit the minimum heat transfer?

A. Boiling

B. Forced convection in air

C. Free convection in air

D. Conduction in air

Discuss this answer

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

Discuss this answer

Accepted Answer

B. Grain coarsening

__________ cannot increase the fatigue strength of a material.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

The hardenability of steel decreases with

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

The main constituent of bones is

Magnetic permeability of iron is increased by its

Which of the following materials does not form adherent oxide film on surface?

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

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

In inventory control theory, the economic order quantity (EOQ) is the

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

Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost

Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

Which of the following is used to produce draught in the locomotive boilers?

The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

Which of the, following is not associated with the functioning of a petrol engine?

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

Speisses is a mixture of the following:

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

Pick out the wrong statement.

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.

Hydrogen can be

The refrigerant freon-12 is chemically

Satellites burn off during re-entry to earth's atmosphere, because of the

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

Addition of __________ to steel does not impart hardness.

Which of the following phenomenon will exhibit the minimum heat transfer?

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

Also checkout

__________ cannot increase the fatigue strength of a material.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

The hardenability of steel decreases with

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

The main constituent of bones is

Magnetic permeability of iron is increased by its

Which of the following materials does not form adherent oxide film on surface?

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

If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.

In inventory control theory, the economic order quantity (EOQ) is the

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

Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost

Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

Which of the following is used to produce draught in the locomotive boilers?

The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

Which of the, following is not associated with the functioning of a petrol engine?

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

Speisses is a mixture of the following:

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

Pick out the wrong statement.

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.

Hydrogen can be

The refrigerant freon-12 is chemically

Satellites burn off during re-entry to earth's atmosphere, because of the

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

Addition of __________ to steel does not impart hardness.

Which of the following phenomenon will exhibit the minimum heat transfer?

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

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