Related Questions
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The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
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4
For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
A. 100% indirect reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction
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4
Which of the following does not have a sharp melting point?
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4
High endurance limit of carburised machine parts is because of the fact that carburisation
A. Suppresses any stress concentration produced in the parts
B. Enhances the yield point of the material
C. Introduces a compressive layer on the surface
D. Produces a better surface finish
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4
Working of linear variable differential transducer (LVDT) is based on the principle of variable
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4
Liquor poisoning generally occurs due to the presence of __________ in it.
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4
The majority charge carriers in p-type silicon are
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__________ is used as a material of construction for the blade of power saw.
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Isotropic materials have the same __________ in all directions.
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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
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4
Austempering process results in the formation of __________ structure.
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Wood is a/an __________ material.
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In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).
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4
Carbon supply in pack carburising process is in the form of
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4
Capacity & power requirement for an air compressor working at high altitude compared to sealevel will be
D. Either more or less; depends on the climatic conditions
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4
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
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4
Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
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4
Absolute zero pressure can be attained at a temperature of
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4
Carbon is present in the form of __________ in grey cast iron.
B. Nodular aggregates of graphite
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4
Which of the following is used to produce draught in the locomotive boilers?
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4
Gross national product (GNP) means the total value of __________ in a country.
C. Earning of the citizens
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4
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
B. Evaporation efficiency
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The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
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4
In chemical dehumidification process
A. Wet bulb temperature increases
B. Dry bulb temperature remains constant
C. Dew point temperature increases
D. Dry bulb temperature increases
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Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?
A. Emissivity of pipe surface
B. Diameter & length of the pipe
C. Temperature of hot pipe surface & that of air in the room
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4
Pick out the wrong conversion of absolute & kinematic viscosities.
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4
For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
A. Voltage sensitive null
B. Voltage sensitive deflected
C. Current sensitive deflected
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4
Electrochemical corrosion can occur, only if __________ is present in contact with metal.
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__________ is the most important element, which controls the physical properties of steel.
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Liquid nitrogen containers can be made from
A. Ferritic stainless steel
D. Austenitic stainless steel