What is the range of tempering temperature (°C) for most of the materials?
75-100
200-300
350-450
500-600
- Softening of hardened steel is done by its
- Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
- Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while…
- Spark plug is provided in a/an
- Which of the following is not used as a bearing material?
- Thermit welding is categorised as the __________ welding.
- Pick out the wrong statement.
- Pick out the correct statement.
- Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil,…
- Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
- Diamagnetic materials
- Colour comparator is used to measure the
- Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
- During sensible heating of humid air
- The material used for coating the welding electrode is termed as the
- The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where,…
- Filler material used in welding should have __________ as compared to the parent metal to be welded.
- About __________ ton of coke is required in a cupola to produce one ton of casting.
- A dummy activity is used in PERT network to describe the
- __________ remains constant during the adiabatic cooling of moist air.
- Which of the following materials has the poorest electrical conductivity?
- Neutrons are present in all atoms except that of
- What is the percentage of chromium in 18-4-1 high speed steel?
- Thermistors are used in __________ devices.
- The most suitable material for die casting is
- Which of the following is the largest quantum of pressure?
- Cassiterite is an ore of
- Shampoos are commercially not available in the form of
- The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.
- Increasing sulphur content in pig iron tends to make it