Maraging steels derive their strength from the following mechanism:
Maraging steels derive their strength from the following mechanism:
The total frictional resistance to fluid flow does not depend upon the
The total frictional resistance to fluid flow does not depend upon the
Angular displacement can be measured suitably by a
Angular displacement can be measured suitably by a
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.
A controller action in which there is a con-tinous relation between the values of controlled variable and the rate of change of conrolled output signal is called the __________ action.
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then
Which of the following will resist maxi-mum shock & vibration without cracking?
Which of the following will resist maxi-mum shock & vibration without cracking?
Specific heat of an ideal gas depends upon its
Specific heat of an ideal gas depends upon its
Which of the following is a boiler accessory i.e., not a boiler mounting ?
Which of the following is a boiler accessory i.e., not a boiler mounting ?
Carbon is present in the form of __________ in grey cast iron.
Carbon is present in the form of __________ in grey cast iron.
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
Castability of aluminium is increased by the addition of __________ in it.
Castability of aluminium is increased by the addition of __________ in it.
The most important material handling system in an integrated steel plant is the
The most important material handling system in an integrated steel plant is the
Free oxygen is removed from boiler feed water, because it
Free oxygen is removed from boiler feed water, because it
On increasing the yield strength of a steel from 450 to 650 MPa, its __________ will increase.
On increasing the yield strength of a steel from 450 to 650 MPa, its __________ will increase.
__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
In a casting, cold shut defect is caused by
In a casting, cold shut defect is caused by
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be
Which of the following phenomenon/ phenomena is/are diffusion controlled ?
Which of the following phenomenon/ phenomena is/are diffusion controlled ?
The weight of a body at the centre of the earth is
The weight of a body at the centre of the earth is
Which of the following is an example of stress corrosion ?
Which of the following is an example of stress corrosion ?
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
Pick out the wrong statement.
Pick out the wrong statement.
With increase in steam pressure, its specific volume decreases
With increase in steam pressure, its specific volume decreases
When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
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
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
Ignition of fuel in a diesel engine is by
Ignition of fuel in a diesel engine is by
Swaging is a/an __________ operation.
Swaging is a/an __________ operation.
Brinell Hardness Number (BHN) for talc is approximately in the range of
Brinell Hardness Number (BHN) for talc is approximately in the range of
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
Lead is poured into the joints between two __________ pipes.
Lead is poured into the joints between two __________ pipes.
Copper is not present as an alloying constituent in
Copper is not present as an alloying constituent in
Which of the following is not a characteristic observed in material failure by fatigue fracture ?
Which of the following is not a characteristic observed in material failure by fatigue fracture ?
Atomic __________ of an element is a whole number.
Atomic __________ of an element is a whole number.
Routing in production, planning & control is concerned with the
Routing in production, planning & control is concerned with the
Which of the following is a unit of time ?
Which of the following is a unit of time ?
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
Hydrogen in liquid steels is dissolved
Hydrogen in liquid steels is dissolved
Rankine cycle comprises of two isothermal and two __________ processes.
Rankine cycle comprises of two isothermal and two __________ processes.
Kinematic viscosity of water as compared to that of air is
Kinematic viscosity of water as compared to that of air is
Coke is added in the blast furnace to
Coke is added in the blast furnace to
Which of the following is not used as a fuel in rocket propellaht ?
Which of the following is not used as a fuel in rocket propellaht ?
The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by
The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by
A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/seC₂ is
A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/seC₂ is
Milk is fat dispersed in water. It is an example of
Milk is fat dispersed in water. It is an example of
__________ forces do not act in case of fluids.
__________ forces do not act in case of fluids.
Which of the following welding processes employs the highest welding temperature ?
Which of the following welding processes employs the highest welding temperature ?
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.
If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
Alloys having more than 80% copper are generally more
Alloys having more than 80% copper are generally more
Frost formation on the evaporator tubes in the domestic refrigerators
Frost formation on the evaporator tubes in the domestic refrigerators
Blast furnace slag is mainly molten
Blast furnace slag is mainly molten
Cold chiesel & hammers are made of
Cold chiesel & hammers are made of
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
Pick out the wrong statement
Pick out the wrong statement
Gantt charts are used for streamlining the
Gantt charts are used for streamlining the
__________ is the most suitable lubricant for drawing mild steel wires?
__________ is the most suitable lubricant for drawing mild steel wires?
First empirical temperature scale conceived is the __________ temperature scale.
First empirical temperature scale conceived is the __________ temperature scale.
Powder metallurgy process does not make metal powder by
Powder metallurgy process does not make metal powder by
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
Laser welding is widely employed in the __________ industries.
Laser welding is widely employed in the __________ industries.
Salvage value is the most flexible criteria for analysing a financial investment. 'Salvaging' means
Salvage value is the most flexible criteria for analysing a financial investment. 'Salvaging' means
The best criterion for analysing an economic investment is the
The best criterion for analysing an economic investment is the
Chlorine acts as a bleaching agent only in the presence of
Chlorine acts as a bleaching agent only in the presence of
Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.
Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.
Steel produced from phosphatic iron is __________ in nature.
Steel produced from phosphatic iron is __________ in nature.
Toughness of a material is measured by the
Toughness of a material is measured by the
Pick out the wrong statement about a fast breeder reactor.
Pick out the wrong statement about a fast breeder reactor.
__________ test can be termed as the semi-distructive test.
__________ test can be termed as the semi-distructive test.
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?
For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?
For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?
Isotropic materials have the same __________ in all directions.
Isotropic materials have the same __________ in all directions.
Air refrigeration cycle is used in the air crafts, because of
Air refrigeration cycle is used in the air crafts, because of
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.
The velocity of sound in air is independent of changes in its
The velocity of sound in air is independent of changes in its
Thermal efficiency of an internal combustion engine is around __________ percent.
Thermal efficiency of an internal combustion engine is around __________ percent.
The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T₁ and T₂ is given by
The efficiency of a Carnot heat engine operating between absolute temperatures T₁ and T₂ (when, T₁ > T₂) is given by (T₁ - T₂)/T₁. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T₁ and T₂ is given by
__________ iron is produced by the annealing of white cast iron.
__________ iron is produced by the annealing of white cast iron.
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?
Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.
Dies for wire drawing are generally made of
Dies for wire drawing are generally made of
Pick out the wrong statement.
Pick out the wrong statement.
The stress at which a metal fails by fatigue lies
The stress at which a metal fails by fatigue lies
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.
Paint spray gun works on the principle of
Paint spray gun works on the principle of
The phenomenon of strain-ageing is generally experienced with
The phenomenon of strain-ageing is generally experienced with
Materials having __________ lattice structure are usually the most ductile.
Materials having __________ lattice structure are usually the most ductile.
Function of feed check valve in a boiler is to
Function of feed check valve in a boiler is to
During sensible cooling of air, its wet bulb temperature
During sensible cooling of air, its wet bulb temperature
Lead is poured into the joint between two __________ pipes.
Lead is poured into the joint between two __________ pipes.
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
In the Bayer's process, bauxite is digested under pressure using
In the Bayer's process, bauxite is digested under pressure using
Fatigue resistance of a material is measured by the
Fatigue resistance of a material is measured by the
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the
In extrusion of metals, which of the following statement is true ?
In extrusion of metals, which of the following statement is true ?
The ratio of coil diameter to wire diameter of a spring is called the spring
The ratio of coil diameter to wire diameter of a spring is called the spring
Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.
Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.
Surface tension is due to the __________ forces.
Surface tension is due to the __________ forces.
