'Cryogenics' is concerned with the generation & use of low temperature in the range of
0°K to 123°K
0°C to - 123°C
0°C to - 273°C
0°K to 273°K
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- Blast furnace slag is mainly molten
- Larger length & diameter water pipes are made by
- As the fluid flow rate increases, the float of the Rotameter
- In a neutral solution
- High endurance limit of carburised machine parts is because of the fact that carburisation
- A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
- Pick out the correct statement.
- Stainless steel is welded with difficulty because of
- In the blast furnace, incorporation of water vapour in the blast gives the following effect.
- The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
- Out of the following, the most malleable material is
- Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts…
- Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other…
- The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
- Which of the following is the most suitable material of construction for the condenser tubes, where…
- Wrought iron does not have
- Maximum hardenability of steel depends upon its
- The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
- __________ has a negative co-efficient of linear expansion.
- Plasma is
- Joule-Thomson co-efficient is the ratio of
- For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship…
- Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the…
- In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates,…
- Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
- Damage to metal surface by mechanical action is called
- Which of the following is the most wear resistant grade of carbide used for the cutting tools?
- Oxide layer formed on the non-ferrous metal surface after its annealing is
- Optical activity is a/an __________ property.
- Which of the following if present in iron ore, enhances its value?