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

Question

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

A. Spherical

B. Nodular

C. Irregular

D. No preferred shape

Share this question with your friends

Show all Chemical Engineering Basics MCQ

Comment

The material used for coating the welding electrode is termed as the

A. Flux

B. Slag

C. Protective layer

D. Binder

Discuss this answer

Which of the following materials has the poorest electrical conductivity?

A. Carbon

B. Aluminium

C. Silver

D. Stainless steel

Discuss this answer

Use of flux during soldering is done to

A. Increase fluidity of solder by lowering its melting temperature

B. Prevent oxide formation

C. Wash away surplus solder

D. Full up the joint gap

Discuss this answer

Laser is a device to produce

A. Gamma rays

B. Microwaves

C. A beam of white light

D. A beam of coherent light

Discuss this answer

Window panes of aeroplanes are normally made of

A. Perspex (PMMA)

B. Teflon (PTFE)

C. Bakelite (phenol formaldehyde)

D. Polystyrene

Discuss this answer

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

A. Full annealing

B. Bright annealing

C. Patenting

D. None of these

Discuss this answer

Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

A. Sorbite

B. Bainite

C. Martensite

D. Troostite

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

Heating of ferromagnetic materials to a temperature above Curie temperature makes it

A. Insulator for heat & electricity transmission

B. Ferritic

C. Behave like paramagnetic materials

D. Superconductor

Discuss this answer

Leakage in a cooking gas cylinder is detected by

A. Radio-isotopes

B. Pouring soap solution on the surface and locating the gas bubbles

C. Halide torch

D. Pungent smell of mercaptans present in the gas

Discuss this answer

Which of the following is an ore dressing operation?

A. Classification

B. Smelting

C. Roasting

D. None of these

Discuss this answer

Milk is fat dispersed in water. It is an example of

A. Suspension

B. Emulsion

C. Gel

D. Solution

Discuss this answer

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

A. Ammonium hydroxide

B. Sodium carbonate

C. Sodium hydroxide

D. Ammonium carbonate

Discuss this answer

Electrometallurgy is not involved in the extraction of __________ from its ore.

A. Aluminium

B. Tin

C. Lead

D. Both (B) & (C)

Discuss this answer

__________ joint is mostly used for joining pipes carrying water at low pressure.

A. Nipple

B. Socket

C. Union

D. Bell and spigot

Discuss this answer

__________ iron is produced by the annealing of white cast iron.

A. Malleable

B. Nodular

C. Ductile

D. Grey

Discuss this answer

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

A. Manganese

B. Silicon

C. Carbon

D. Vanadium

Discuss this answer

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

Discuss this answer

Temper brittleness of a material can be fairly detected by the __________ test.

A. Fatigue

B. Notched bar impact

C. Tensile

D. Hardness

Discuss this answer

Brazing filler metal used for joining steel plates

A. Melts below the melting points of base metals

B. Melts below 300°C

C. Is copper phosphorous alloy

D. Is copper

Discuss this answer

Corona discharge is related to the operation of a/an

A. Induction motor

B. Electrostatic precipitator

C. Fast breeder reactor

D. Magneto hydrodynamic generator (MHD)

Discuss this answer

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

A. Cresylic acid

B. Xanthaies

C. Pine oil

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

Discuss this answer

With increase in compression ratio, the volumetric efficiency of air compressor

A. Increases

B. Decreases

C. Remain same

D. May increase or decrease (depends on the suction pressure)

Discuss this answer

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

A. 5

B. 10

C. 20

D. 35

Discuss this answer

Lead is poured into the joint between two __________ pipes.

A. Mild steel

B. Concrete

C. Cast iron

D. Asbestos cement

Discuss this answer

Rain drops falling through atmospheric air attain limited terminal velocity, because of

A. Upward thrust due to air

B. Viscous force exerted by air

C. Surface tension effects of water

D. Force of gravity

Discuss this answer

Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________ respectively.

A. 70 & 30

B. 30 & 70

C. 50 & 50

D. 90 & 10

Discuss this answer

The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

A. Greater than

B. Less than

C. Equal to

D. Unpredictable; depends on the bubble size

Discuss this answer

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

A. More

B. Equal

C. Less

D. Double

Discuss this answer

Photographic plates are coated with

A. Silver nitrate

B. Silver halide

C. Calcium silicate

D. Metallic silver

Discuss this answer

Accepted Answer

A. Spherical

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

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

The material used for coating the welding electrode is termed as the

Which of the following materials has the poorest electrical conductivity?

Use of flux during soldering is done to

Laser is a device to produce

Window panes of aeroplanes are normally made of

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

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

Heating of ferromagnetic materials to a temperature above Curie temperature makes it

Leakage in a cooking gas cylinder is detected by

Which of the following is an ore dressing operation?

Milk is fat dispersed in water. It is an example of

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

Electrometallurgy is not involved in the extraction of __________ from its ore.

__________ joint is mostly used for joining pipes carrying water at low pressure.

__________ iron is produced by the annealing of white cast iron.

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

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

Temper brittleness of a material can be fairly detected by the __________ test.

Brazing filler metal used for joining steel plates

Corona discharge is related to the operation of a/an

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

With increase in compression ratio, the volumetric efficiency of air compressor

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

Lead is poured into the joint between two __________ pipes.

Rain drops falling through atmospheric air attain limited terminal velocity, because of

Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________ respectively.

The pressure outside a bubble/droplet of liquid is __________ the internal pressure.

The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is

Photographic plates are coated with

Also checkout