Oxygen cylinders used for autogenous (cutting/welding) purposes are
Seamless & made of steel
Heat treated before use
Made by sand casting
Welded steel cylinders
- A steam pipe is intended to be insulated with two layers of insulating materials of different thermal…
- With increase in annealing temperature, the following defect density decreases.
- Material of construction of foundry crucible is
- Young's modulus of a material is the measure of its
- Silicon crystal can be converted to p-type semiconductor by doping with
- Out of the following, which will fracture most readity, when hit with a hard hammer?
- Austempering process results in the formation of __________ structure.
- Work done by a/an __________ process is determined by ∫p. dv
- __________ is the most suitable lubricant for drawing mild steel wires?
- Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
- Leakage in a cooking gas cylinder is detected by
- The materials which fracture even at small strains are termed as brittle, while those materials which…
- Which of the following alloying elements is present in maximum percentage in high speed steel?
- Identify the correct statement.
- Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air…
- At absolute zero temperature, for any reaction involving condensed phases
- Maximum permissible sulphur content in steel is __________ percent.
- Cold chisel & hammers are made of
- Pick out the wrong statement.
- Nickel and __________ are the alloying element added in steel to increase its toughness.
- For grinding of softer materials, the grinding wheel should have __________ grain size.
- Hardening of steel is not possible, unless it is heated __________ critical point.
- Fatigue limit improvement by over stressing the metal by successively increasing the load is called…
- X-rays are
- The majority charge carriers in p-type silicon are
- Magnesium is present in
- The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic…
- Production of a hollow product by inflation of a tube or parison is called the __________ process.
- Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical…
- Which of the following metals reacts violently with water?