Related Questions
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Density in the solid state is slightly less than that in its liquid state, in case of
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4
Ammonia leakage in the refrigeration system is detected by
A. Sulphur stick, which on detection gives white smoke
B. Using chemical reagents
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4
According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is
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4
The activity co-efficient of the solute in a dilute solution
A. Decreases with the increase of concentration of the solute
B. Increases with the increase of concentration of the solute
D. Is unity at infinite dilution
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4
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
High speed steel tools retain their hardness upto a temperature of __________ °C.
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4
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be
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4
The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element.
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4
The trace metal present in insulin is
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4
Hydrogen can be
A. Used in I.C. engines as fuel
B. Liquefied & stored under cryogenic conditions
C. Produced by electrolysis of water
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4
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.
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4
Pick out the wrong statement.
A. Lead can creep under its own weight at room temperature
B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement
C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal
D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase
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4
Titanium is added to molten aluminium alloys before casting for the purpose of
B. Increasing corrosion resistance
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4
Unit of surface tension in S.I. unit is
B. Joule/
C. Newton/
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4
Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
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4
Oxyacetylene reducing flame is used while carrying out welding on
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4
__________ property of a material is determined by the Herbert Pendulum device.
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4
In a good rimming steel
A. Carbon and silicon should be low
B. Silicon should be low but carbon should be high
C. Both silicon & carbon should be high
D. Silicon should be high but carbon should be low
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4
The order of a chemical reaction
A. Can be determined only experimentally
B. Can be determined from the stoichiometry of the reaction
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4
Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
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4
Compressed dry air is used as the cutting fluid, while machining
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One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m- 1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
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4
The process of removal of scale formed during hot rolling of steel is termed as
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4
Photographic plates are coated with
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4
In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).
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4
Primary designation of steel is based on its
A. Hardness & tensile strength
D. Alloying elements content
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4
If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
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__________ stress cannot be sustained by a fluid in equilibrium.
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Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
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4
During sensible heating of humid air
A. Relative humidity increases
B. Dew point remains constant
C. Dry bulb & wet bulb temperature increases