Related Questions
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4
Boiling point of water gets lowered at high altitudes (e.g., hills), because
B. Atmospheric pressure is low
C. Atmospheric pressure is high
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4
Out of the following, the joint produced by __________ has the lowest strength.
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4
The following thermocouple may be used for measuring temperature upto 1873°K.
C. Platinum-platinum rhodium
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4
In case of simple harmonic motion, displacement is proportional to the
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4
'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and
C. Light hydrocarbon gases (e.g. butane or propane)
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4
The refrigerant freon-12 is chemically
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4
Shaft/rotor speed is most accurately measured by a
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4
The best guide to judge the general quality of water is the measurement of its
B. Electrical conductivity
D. Dissolved oxygen content
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4
L.D. (Linz-Donawitz) converter is used in the production of
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4
Most important property of steels for use in automobile bodies is the
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4
The co-ordination number in simple cubic structure is
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The rolling process cannot be used to produce
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While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
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Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.
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Heat release during phase change is observed in case of a/an
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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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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
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4
Pick out the wrong statement.
A. Copper is the metal having the highest electronic conductivity
B. Hardenability & Weldability of metals are inversely related
C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials
D. Glass transition temperature applies to 'polymers' but not to 'glasses'
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4
__________ is not a case hardening process.
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4
Pick out the wrong statement.
A. Seam welding, projection welding & spot welding are the classification of electrical resistance welding
B. Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded)
C. In spot welding, two pieces to be joined are overlapped and placed between two electrodes
D. Mild steel sheet cannot be spot welded
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The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
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Cold heading or upsetting is categorised as the __________ process.
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4
Ceramic compounds as compared to metallic compounds
B. Resist greater tensile stress at room temperature
C. Have higher melting temperature
D. Are better conductor of electricity at higher temperature
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A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.
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4
Gratings is associated with the measurement of
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4
Percentage of argon (by volume) in dry atmospheric air is about
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Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
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4
The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
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4
As the fluid flow rate increases, the float of the Rotameter
B. Rotates at higher speed
C. Rotates at lower speed
D. Drops down in the tube
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4
The main constituent of bones is