Unbreakable crockeries are made from __________ polymers.
Polystyrene
Melamine
Polystyrene
Polyurethane
- Ferromagnetic materials owe their properties to __________ inner sub-shells.
- Constituents of stellite are
- Dew point temperature always gives an indication of the __________ of the moist air.
- Joule-Thomson co-efficient is the ratio of
- Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at…
- Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect…
- Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil,…
- Which of the following phenomenon/ phenomena is/are diffusion controlled?
- Yield strength of a material is determined by the __________ test.
- 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable…
- A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C…
- Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air…
- Out of the following, the joint produced by __________ has the lowest strength.
- __________ metal is used as a bearing liner material.
- A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure…
- The cathode in an electrochemical cell always carries
- Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
- Fibrous fracture is normally encountered in the __________ materials.
- The noble metals
- Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
- The rolling process cannot be used to produce
- Which of the following alloying elements is present in maximum percentage in high speed steel?
- In the acid Bessemer process, the hot metal should have the following composition.
- The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer…
- Particle nature of cathode rays is proved due to the fact that they
- Machinability of hard alloys and tool steels is improved by
- If a solid is compressed adiabatically in its elastic range, its __________ remains constant
- Main constituent of bone ash is
- Which of the following is preferred for riveting?
- Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is