Pick out the wrong statement about the machinability of metals. Machinability of a metal

Question

Pick out the wrong statement about the machinability of metals. Machinability of a metal

A. Decreases with increase in strain hardening tendencies

B. Decreases with increase in hardness, in general

C. Depend on the composition, microstructure and physical & mechanical properties

D. Decreases with increases in tensile strength & decrease in grain size

Share this question with your friends

Show all Chemical Engineering Basics MCQ

Comment

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

A. Red

B. Extended

C. Super

D. Extreme

Discuss this answer

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

A. 2-5

B. 18-20

C. 12-15

D. 6-12

Discuss this answer

Steel is welded using the __________ flame.

A. Carburising

B. Neutral

C. Oxidising

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

Discuss this answer

Nickel is a __________ material.

A. Ferromagnetic

B. Semi-conductor

C. Paramagnetic

D. Ferroelectric

Discuss this answer

Isotropic materials have the same __________ in all directions.

A. Induced stresses

B. Density

C. Elastic properties

D. Thermal properties

Discuss this answer

Shampoos are commercially not available in the form of

A. Powder

B. Gaseous mixture

C. Solution

D. Emulsion

Discuss this answer

Superheating of steam is done at constant

A. Enthalpy

B. Entropy

C. Pressure

D. Volume

Discuss this answer

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

A. Spherical

B. Nodular

C. Irregular

D. No preferred shape

Discuss this answer

The value of for air & most common gases can be safely assumed to be

A. 0.8

B. 1

C. 1.4

D. 1.8

Discuss this answer

The phenomenon occurring during explosion of a hydrogen bomb is

A. Nuclear fission

B. Nuclear fusion

C. A combination of both nuclear fission & fusion

D. None of these

Discuss this answer

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

A. Decreasing the surface area of the electrodes

B. Increasing the concentration of zinc sulphate solution

C. Increasing the surface area of the electrodes

D. Increasing the concentration of copper sulphate solution

Discuss this answer

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

A. Impact

B. Cupping

C. Hardness

D. Tensile

Discuss this answer

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

A. Concentration

B. Velocity

C. Temperature

D. None of these

Discuss this answer

Spherical shape of mercury droplets is due to its

A. High viscosity

B. Low surface tension

C. High density

D. High surface tension

Discuss this answer

Addition of __________ to steel does not help in improving its machinability.

A. Sulphur

B. Silicon

C. Lead

D. Phosphorous

Discuss this answer

Which of the following properties of a solid is not dependent on crystal imperfection?

A. Ductility

B. Semi-conductivity

C. Melting point

D. Yield stress

Discuss this answer

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

Discuss this answer

The lightest non-inflammable gas is

A. H2

B. He

C. Ar

D. O2

Discuss this answer

Stresses encountered in the metal forming processes are less than the __________ of the material.

A. Fracture strength

B. Yield strength

C. Elastic limit

D. Limit of proportionality

Discuss this answer

Silicon percentage in the silicon steel used for electrical appliances/equipments is

A. 0.3-0.4

B. 12-14

C. 3-4

D. 20-25

Discuss this answer

Transformer cores are normally made from

A. Soft ferrites

B. High purity iron

C. Grain oriented Fe-Si alloy

D. Al-Ni-Co alloy

Discuss this answer

Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

A. Working

B. Bearing

C. Yield

D. None of these

Discuss this answer

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be

A. 9.5 : 1

B. 12.5 : 1

C. 15.5 : 1

D. 18.5 : 1

Discuss this answer

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

A. Wet bulb temperature=dry bulb temperature

B. Wet bulb temperature=dew point temperature

C. Saturation temperature=dew point temperature

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

Discuss this answer

Lead pencil contains

A. Graphite

B. Lead sulphide

C. Lead

D. Both (B) & (C)

Discuss this answer

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

A. Mach

B. Reynolds

C. Froude

D. Weber

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

At absolute zero temperature, for any reaction involving condensed phases

A. Δ G° = 0 , Δ H° = 0

B. Δ H° = 0 , Δ S° = 0

C. Δ S° = 0 , Δ E° = 0

D. Δ S° = 0 , Δ Cp° = 0

Discuss this answer

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)

Discuss this answer

Work done by a/an __________ process is determined by ∫p. dv

A. Adiabatic

B. Quasi-static

C. Isothermal

D. Isentropic

Discuss this answer

Accepted Answer

D. Decreases with increases in tensile strength & decrease in grain size

Pick out the wrong statement about the machinability of metals. Machinability of a metal

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Steel is welded using the __________ flame.

Nickel is a __________ material.

Isotropic materials have the same __________ in all directions.

Shampoos are commercially not available in the form of

Superheating of steam is done at constant

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

The value of for air & most common gases can be safely assumed to be

The phenomenon occurring during explosion of a hydrogen bomb is

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

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

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

Spherical shape of mercury droplets is due to its

Addition of __________ to steel does not help in improving its machinability.

Which of the following properties of a solid is not dependent on crystal imperfection?

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 lightest non-inflammable gas is

Stresses encountered in the metal forming processes are less than the __________ of the material.

Silicon percentage in the silicon steel used for electrical appliances/equipments is

Transformer cores are normally made from

Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

Lead pencil contains

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

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

At absolute zero temperature, for any reaction involving condensed phases

An ideal material for making cooking vessels should have

Work done by a/an __________ process is determined by ∫p. dv

Also checkout

Pick out the wrong statement about the machinability of metals. Machinability of a metal

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

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

The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Steel is welded using the __________ flame.

Nickel is a __________ material.

Isotropic materials have the same __________ in all directions.

Shampoos are commercially not available in the form of

Superheating of steam is done at constant

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

The value of for air & most common gases can be safely assumed to be

The phenomenon occurring during explosion of a hydrogen bomb is

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

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

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

Spherical shape of mercury droplets is due to its

Addition of __________ to steel does not help in improving its machinability.

Which of the following properties of a solid is not dependent on crystal imperfection?

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 lightest non-inflammable gas is

Stresses encountered in the metal forming processes are less than the __________ of the material.

Silicon percentage in the silicon steel used for electrical appliances/equipments is

Transformer cores are normally made from

Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

Lead pencil contains

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

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

At absolute zero temperature, for any reaction involving condensed phases

An ideal material for making cooking vessels should have

Work done by a/an __________ process is determined by ∫p. dv

Also checkout

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

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

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.