Cermets are used for making (A) Cutting tools (B) Abrasives (C) Both (A) & (B) (D) Neither (A) nor (B)

Cermets are used for making
(A) Cutting tools
(B) Abrasives
(C) Both (A) & (B)
(D) Neither (A) nor (B)
by

1 Answer

Answer :

(C) Both (A) & (B)
by

Related questions

Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451 b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40% retained on a 20 mesh c) either (a) or (b) * d) d) neither (a) or (b)

Description : Surface preparation for Metallising the abrasives used for final cleaning is a) Chilled iron grit G.24, as defined in BS : 2451 b) Washed salt free angular silica sand of mesh size 12 to 30 with a minimum of 40% retained on a 20 mesh c) either (a) or (b) * d) d) neither (a) or (b)

Last Answer : c) either (a) or (b) *

Reaction of calcium carbide with water produces a gas, which is used (A) As an illuminant (B) For metal cutting/welding(C) Both (A) & (B)(D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

Broaching tools are usually made of (A) Cermets (B) High speed steel (C) Tungsten carbide (D) Stellite

Description : Broaching tools are usually made of (A) Cermets (B) High speed steel (C) Tungsten carbide (D) Stellite

Last Answer : Option B

High purity nitrogen is used in (A) Making protective gas (95% N2 + 5% H2 ) for annealing of cold rolled steel strip coils (B) Fire fighting purposes (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (D) All the above

Non-ferrous alloys used for making cutting tools need not have high (A) Abrasion resistance (B) Toughness (C) Red hardness (D) Cutting speed

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Last Answer : (C) Red hardness

Which one of the following statements about self-regulatory programmes is FALSE? A)they are usually less expensive than governmental ones VU Cafeteria B)their guidelines are generally more realistic and operational C)nongovernmental ones have neither the tools nor the authority to enforce guidelines D)the guidelines are generally stricter than governmental ones

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The function of gypsum addition during cement making is to (A) Increase the density of cement (B) Decrease the cement setting rate (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (B) Decrease the cement setting rate

Contact dermatitis, which of the following are common irritants? A. Water (Missed. B. temperature extremes (Missed. C. Frictional abrasives (Missed. D. Nickel Ans: D 123. Atopic eczema induces lichenification A. True B. False

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Last Answer : Ans: A

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of (A) 90% tungsten carbide and 10% cobalt (B) 70% aluminium oxide & 30% silica (C) 30% nickel, 15% chromium & 55% tungsten (D) 65% tungsten & 35% zirconium

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Last Answer : Option A

Which of the following is not used as the ceramic material in ‘cermets’? (A) Silicides (B) Oxides (C) Carbides (D) Nitrides

Description : Which of the following is not used as the ceramic material in ‘cermets’? (A) Silicides (B) Oxides (C) Carbides (D) Nitrides

Last Answer : (D) Nitrides

Cermets are __________ materials. (A) Refractory (B) Reinforced (C) Abrasive (D) Fully metallic

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Last Answer : (A) Refractory

Combination of metals and ceramics are called (A) Metalloy (B) Cermets (C) Pellets (D) Non-crystalline ceramics

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Last Answer : (B) Cermets

In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet? (A) Zirconia (B) Alumina (C) Bakelite (D) Tungsten carbi

Description : In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet? (A) Zirconia (B) Alumina (C) Bakelite (D) Tungsten carbi

Last Answer : Option D

Which of the following is not used as a bearing material? (A) Copper-lead alloys (B) Babbitts (C) Bronzes (D) Cermets

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Last Answer : Option D

Drills are usually made of (A) Cermets (B) High speed steel (C) Alloy steel (D) Tungsten carbide

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Last Answer : Option B

The entrained concrete is used in lining walls and roofs for making (A) Heat insulated (B) Sound insulated (C) Neither (a) nor (b) (D) Both (a) and (b)

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Last Answer : Answer: Option D

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Last Answer : (C) Both (A) & (B)

Starting material for the production of SBR is (A) Ethyl alcohol (B) Ethylene (C) Both (A) & (B) (D) Neither (A) nor (B)

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Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex? (A) Ammonium alum (B) Potassium alum(C) Both ‘a’ & ‘b’(D) Neither ‘a’ nor ‘b

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Last Answer : (B) In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive

Aniline point is the (A) Characteristic property of diesel & lubricating oils (B) Measure of aromatic content of oil (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) and (B

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Last Answer : (C) Both ‘a’ & ‘b

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Last Answer : (C) Both (A) & (B)

Horsepower required for a roll crusher is directly proportional to its (A) Reduction ratio (B) Capacity(C) Both (A) & (B)(D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond's law, Rittinger's law and Kick's law) depend upon the (A) Feed material (B) Type of crushing machine (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

The grinding in a hammer crusher takes place due to the (A) Attrition (B) Impact (C) Both (A) & (B) (D) Neither (A) nor (B

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Last Answer : (C) Both (A) & (B)

The mechanism of size reduction by a hammer mill is by impact and attrition between the (A) Grinding element & the housing (B) Feed particles (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) and (B)

Additives used for promoting the flocculation of particles is a/an (A) Electrolyte (B) Surface active agent (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration. (A) Rate(B) Pressure(C) Both (A) & (B)(D) Neither (A) nor (B

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Last Answer : (C) Both (A) & (B)

Width and speed of a conveyor belt depends upon the __________ of the material. (A) Lump size (B) Bulk density (C) Both (A) & (B) (D) Neither (A) nor (B

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Size reduction of moulding powders, waxes, resins & gums are done in a __________ mill. (A) Cage (B) Hammer (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

Close circuit grinding by a ball mill with air sweeping employs a (A) Classifier (B) Cyclone separator between mill & classifier (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

Use of baffles in agitators help in minimising the __________ tendency. (A) Swirling (B) Vortexing (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Use of baffles in agitators help in minimising the __________ tendency. (A) Swirling (B) Vortexing (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

The important dimensional group involved in the power requirement calculation in mixing operation is the __________ number. (A) Reynold's (B) Froude (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The important dimensional group involved in the power requirement calculation in mixing operation is the __________ number. (A) Reynold's (B) Froude (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Use of grinding aids results in the (A) Enhanced production rate (B) Finer products (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Use of grinding aids results in the (A) Enhanced production rate (B) Finer products (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (D) Neither (A) nor (B)

Toothed roll crushers achieve size reduction by (A) Tearing (shear) and compression (B) Impact and attrition (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Toothed roll crushers achieve size reduction by (A) Tearing (shear) and compression (B) Impact and attrition (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Separation of isotopes is generally done using a/an __________ centrifuge. (A) Ultra (B) Disk-bowl (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (A) Ultra

Filtration capacity of a rotary drum vacuum filter depends upon the (A) Cake thickness (B) Characteristics of the feed slurry (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Filtration capacity of a rotary drum vacuum filter depends upon the (A) Cake thickness (B) Characteristics of the feed slurry (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

With increase in carbide/graphite ratio in cast iron, its (A) Hardness & brittleness increases (B) Ductility decreases (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) and (B)

Galvanising (i.e., zinc coating) of steel sheets is done to (A) Prevent its rusting by contact with corrosive atmosphere (B) Protect the base metal by cathodic protection (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)

Corrosion involves exchange of electrons in __________ corrosion. (A) Chemical (B) Electrochemical (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Corrosion involves exchange of electrons in __________ corrosion. (A) Chemical (B) Electrochemical (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

The damage/deterioration of metals by the __________ action of fluids is called 'erosion'. (A) Abrasive (B) Corrosive (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The damage/deterioration of metals by the __________ action of fluids is called 'erosion'. (A) Abrasive (B) Corrosive (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (A) Abrasive

Age hardening' of duralumin is due to (A) Copper (B) Magnesium (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Age hardening' of duralumin is due to (A) Copper (B) Magnesium (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Dry bulb temperature of unsaturated air is more than its __________ temperature. (A) Dew point (B) Wet bulb (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Description : Dry bulb temperature of unsaturated air is more than its __________ temperature. (A) Dew point (B) Wet bulb (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Last Answer : (C) Both 'a' & 'b

Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution. (A) Degree of ideality (B) Viscosity (C) Both 'a '& 'b' (D) Neither 'a' nor 'b'

Description : Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution. (A) Degree of ideality (B) Viscosity (C) Both 'a '& 'b' (D) Neither 'a' nor 'b'

Last Answer : (C) Both 'a '& 'b

In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase. (A) Gas (B) Liquid (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (B) Liquid

Gaseous diffusion co-efficient increases with increase in the (A) Pressure (B) Temperature (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (B) Temperature

Heat load in a cooling tower (A) Means the amount of heat thrown away (KCal/hr.) by the cooling tower (B) Is equal to the number of kg, of water circulated times the cooling range (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (C) Both (A) & (B)