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)

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)
by

1 Answer

Answer :

(A) Abrasive
by

Related questions

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)

Description : 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)

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

The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids (A) Having high viscosities (B) Moving at low velocities (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids (A) Having high viscosities (B) Moving at low velocities (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Diaphragm valves are used for handling __________ fluids. (A) Corrosive (B) Viscous (C) Non-Newtonian (D) Solid suspended

Description : Diaphragm valves are used for handling __________ fluids. (A) Corrosive (B) Viscous (C) Non-Newtonian (D) Solid suspended

Last Answer : (A) Corrosive

In industrial operations fluids with temperature less than __________ are set as the limit for waste heat recovery because of the risk of condensation of corrosive liquids a. 80C b. 100C c. 120C d. 200C

Description : In industrial operations fluids with temperature less than __________ are set as the limit for waste heat recovery because of the risk of condensation of corrosive liquids a. 80C b. 100C c. 120C d. 200C

Last Answer : 100C

Extreme Pressure (EP) additives cause ______ wear in the bearing parts. (a) abrasive (b) corrosive (c) pitting (d) fatigue

Description : Extreme Pressure (EP) additives cause ______ wear in the bearing parts. (a) abrasive (b) corrosive (c) pitting (d) fatigue

Last Answer : (b) corrosive

Extreme pressure causes ______ wear in the bearing parts. a) Abrasive b) Corrosive c) Pitting d) All of the mentioned

Description : Extreme pressure causes ______ wear in the bearing parts. a) Abrasive b) Corrosive c) Pitting d) All of the mentioned

Last Answer : b) Corrosive

Brazing is the joining of metals (A) Without melting the base metal (B) With a non-ferrous filler (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Brazing is the joining of metals (A) Without melting the base metal (B) With a non-ferrous filler (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : Option C

Hydrochloric acid is __________ corrosive to common metals. (A) Least (B) Not (C) Mildly (D) Highly

Description : Hydrochloric acid is __________ corrosive to common metals. (A) Least (B) Not (C) Mildly (D) Highly

Last Answer : (D) Highly

The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as – (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : (2) Corrosion Explanation: Corrosion can be defined as the deterioration of materials by chemical processes.

Excessive camber on pavements may cause (A) Deterioration of central portion (B) Slip of the speedy vehicles towards the edges (C) Erosion of the berms (D) All the above

Description : Excessive camber on pavements may cause (A) Deterioration of central portion (B) Slip of the speedy vehicles towards the edges (C) Erosion of the berms (D) All the above

Last Answer : Answer: Option D

The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Description : The deterioration of a metal by an electrochemical process is commonly termed as (1) Erosion (2) Corrosion (3) Passivation (4) Abrasion

Last Answer : Corrosion

Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by (A) Natural aeration of water stream (B) Photosynthetic action of algae (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by (A) Natural aeration of water stream (B) Photosynthetic action of algae (C) Both (A) & (B) (D) Neither (A) nor (B)

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

In connection with corrosion of metals, passivation is the process that (A) Intensifies deterioration (B) Changes the composition of the metal (C) Inhibits further deterioration (D) None of these

Description : In connection with corrosion of metals, passivation is the process that (A) Intensifies deterioration (B) Changes the composition of the metal (C) Inhibits further deterioration (D) None of these

Last Answer : (C) Inhibits further deterioration

Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Damage to metal surface by mechanical action is called (A) Pitting (B) Corrosion (C) Erosion (D) None of these

Description : Damage to metal surface by mechanical action is called (A) Pitting (B) Corrosion (C) Erosion (D) None of these

Last Answer : Option C

If the market share of a company is increasing 1. It is a sign of progress 2. The company must take the action to arrest the trend 3. both 1 & 2 4. neither 1 nor 2 5. None of these

Description : If the market share of a company is increasing 1. It is a sign of progress 2. The company must take the action to arrest the trend 3. both 1 & 2 4. neither 1 nor 2 5. None of these

Last Answer : It is a sign of progress

If the market share of a company is increasing 1. It is a sign of progress 2. The company must take the action to arrest the trend 3. Both 1 & 2 4. Neither 1 nor 2 5. None of these

Description : If the market share of a company is increasing 1. It is a sign of progress 2. The company must take the action to arrest the trend 3. Both 1 & 2 4. Neither 1 nor 2 5. None of these

Last Answer : It is a sign of progress

In nuclear reactions, __________ number is conserved. (A) Mass (B) Atomic (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In nuclear reactions, __________ number is conserved. (A) Mass (B) Atomic (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Description : 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

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

Description : 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

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

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)

Description : 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)

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)

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

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

Last Answer : (A) Ultra

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)

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)

Description : 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)

Last Answer : (B) Liquid

In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase. (A) Liquid (B) Gas (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase. (A) Liquid (B) Gas (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (B) Gas

The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model. (A) Plug (B) Perfectly mixed (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model. (A) Plug (B) Perfectly mixed (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (A) Plug

The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model. (A) Plug (B) Perfectly mixed (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model. (A) Plug (B) Perfectly mixed (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (B) Perfectly mixed

Packed column distillation is limited to the column __________ metres. (A) Height < 6 (B) Diameter < 0.6 (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Packed column distillation is limited to the column __________ metres. (A) Height < 6 (B) Diameter < 0.6 (C) Both (A) & (B) (D) Neither (A) nor (B)

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

In case of constant underflow extraction operation, the __________ atall solute concentration.(A) Solids are drained to the same extent(B) Ratio of the insoluble to solution is constant(C) Both (A) & (B)(D) Neither (A) nor (B)

Description : In case of constant underflow extraction operation, the __________ atall solute concentration. (A) Solids are drained to the same extent (B) Ratio of the insoluble to solution is constant (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Nusselt number (for forced convection heat transfer) is a function of the __________ number. (A) Prandtl (B) Reynolds (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Nusselt number (for forced convection heat transfer) is a function of the __________ number. (A) Prandtl (B) Reynolds (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Kirchoff’s law applies to __________ radiation. (A) Total (B) Monochromatic (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Kirchoff’s law applies to __________ radiation. (A) Total (B) Monochromatic (C) Both (A) & (B) (D) Neither (A) nor (B)

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

. A perfect black body is a perfect __________ of radiation. (A) Absorber (B) Emitter (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : . A perfect black body is a perfect __________ of radiation. (A) Absorber (B) Emitter (C) Both (A) & (B) (D) Neither (A) nor (B)

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

With increase in the oxygen content of the coal, its __________ decreases. (A) Calorific value (B) Caking power (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : With increase in the oxygen content of the coal, its __________ decreases. (A) Calorific value (B) Caking power (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Very __________ coals are completely devoid of cokability i.e., it is non-coking. (A) Young (B) Mature (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Description : Very __________ coals are completely devoid of cokability i.e., it is non-coking. (A) Young (B) Mature (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

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

Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

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

The rate of shear versus the shear stress curves are time dependent for __________ fluid. (A) Thixotropic (B) Rheopectic (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The rate of shear versus the shear stress curves are time dependent for __________ fluid. (A) Thixotropic (B) Rheopectic (C) Both (A) & (B) (D) Neither (A) nor (B)

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

. A Rotameter works on the principle of __________ pressure drop. (A) Constant(B) Variable(C) Both (A) & (B)(D) Neither (A) nor (B)

Description : . A Rotameter works on the principle of __________ pressure drop. (A) Constant (B) Variable (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (A) Constant

Velocity head on sudden enlargement in a horizontal pipe is converted into __________ head. (A) Elevation (B) Pressure (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Velocity head on sudden enlargement in a horizontal pipe is converted into __________ head. (A) Elevation (B) Pressure (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (B) Pressure

With increase in temperature, the equilibrium __________ rises in case of endothermic reaction. (A) Constant (B) Conversion (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : With increase in temperature, the equilibrium __________ rises in case of endothermic reaction. (A) Constant (B) Conversion (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (B) Conversion

Design of heterogamous catalytic reactor involves consideration of __________ steps. (A) Only chemical (B) Only physical (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Design of heterogamous catalytic reactor involves consideration of __________ steps. (A) Only chemical (B) Only physical (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Signal normally used to study non-ideal flow by stimulus response technique is __________ input. (A) Pulse (B) Step (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Signal normally used to study non-ideal flow by stimulus response technique is __________ input. (A) Pulse (B) Step (C) Both (A) & (B) (D) Neither (A) nor (B)

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

The single parameter model proposed for describing non-ideal flow is the __________ model. (A) Tank in series (B) Dispersion (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : The single parameter model proposed for describing non-ideal flow is the __________ model. (A) Tank in series (B) Dispersion (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Chemical kinetics can predict the __________ of a chemical reaction. (A) Rate (B) Feasibility (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Chemical kinetics can predict the __________ of a chemical reaction. (A) Rate (B) Feasibility (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (A) Rate

In a CSTR __________ varies with time. (A) Reaction rate (B) Concentration (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In a CSTR __________ varies with time. (A) Reaction rate (B) Concentration (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Sodium bisulphite is used for __________ water. (A) Deaeration (B) Dechlorination (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Sodium bisulphite is used for __________ water. (A) Deaeration (B) Dechlorination (C) Both (A) & (B) (D) Neither (A) nor (B)

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

If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'

Description : If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'

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