Which one can be directly solidified from gaseous state without entering into liquid state?
Helium
Oxygen
Carbon dioxide
None of these
- The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 >…
- __________ metal is used as a bearing liner material.
- The leaching solvent used in Baeyer's process for the purification of bauxite is
- Nickel is a __________ material.
- Thermistors are used in __________ devices.
- Which of the following mainly decides the current to be employed is arc welding?
- The swift cup test evaluates the following property of a sheet metal.
- Drills are usually made of
- Heating of ferromagnetic materials to a temperature above Curie temperature makes it
- Pick out the wrong statement.
- Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.
- The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic…
- Which of the following forces does not act on a fluid at rest?
- According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear…
- The refrigerant freon-12 is chemically
- The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D…
- Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
- Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.
- Pick out the wrong statement.
- While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________…
- Normalising of a casting does not
- Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
- __________ the exhaust gas is an indication of the incomplete combustion of fuel.
- Function of fusible plug in a boiler is to
- __________ circuit is most commonly used to measure strain with the help of a strain gauge.
- Lap joints are preferred over butt joints in soldering/brazing, because these joints are
- Out of the following, the joint produced by __________ has the lowest strength.
- Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with…
- Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
- Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium