Related Questions
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4
Angular displacement can be measured suitably by a
B. Linear variable differential transducer (LVDT)
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4
When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
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4
__________ of hard alloy and tool steel is done to make it easily machinable.
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4
The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by
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4
The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
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4
'Amortization' in respect of financial obligation of a company means the
A. Liquidation of financial obligations on instalment basis
B. Commitment of financial obligation on priority
C. Liquidation of all the obsolete equipments of the company
D. Modernisation of the plant equipments
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4
Which of the following materials has the maximum shrinkage allowance?
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4
Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are:
A. Nickel, cobalt & chromium
B. Tungsten, chromium & cobalt
C. Manganese, chromium & cobalt
D. Tungsten, molybdenum & nickel
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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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4
Basicity of the slag in Indian blast furnace is in the range of
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4
Pick out the wrong statement.
A. Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar
B. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise
C. Most of the hydrocarbons are non-polar
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4
For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by
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4
Dielectric
A. Is an electrical insulating material
B. Of low resistivity is preferred
C. Should have high thermal conductivity
D. Need not defy the corrosive action of chemicals
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4
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?
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4
Potable water means the water used for
D. Evaporation to produce steam
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4
Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process?
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4
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be
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4
Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8
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4
Which of the following mainly decides the current to be employed is arc welding?
C. Voltage across the arc
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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
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4
Pressure required to increase the density of water by about 1% is __________ atmosphere.
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4
A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to
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4
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
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4
The elastic strain in copper is due to the
A. Motion of dislocations
B. Stretching of atomic bonds
C. Breakage of atomic bonds
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4
__________ is a special constituent of chlorophyll without which photosynthesis is not possible.
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Joining of thin foils is preferred to be done by
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Boiler tube size is specified by its thickness and __________ diameter.
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Evaporative cooling process employs a combination of cooling and humidification in which the
A. Sensible heat is added
B. Sensible heat is removed and the latent heat is added
C. Latent heat is removed
D. Sensible heat is added and latent heat is removed
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4
A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons.
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The escape velocity of a body on earth which is independent of its mass is about __________ km/second.