A. Retained austenite
B. Martensite formation
C. Relatively high sulphur content in the base metal
D. Sufficient hydrogen present in the welding arc
Correct Answer: Martensite formation ✔
Last Updated: February 08, 2019
Related MCQs
- Which of the following forces does not act on a fluid at rest ?
- On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal?
- In connection with corrosion of metals, passivation is the process that__________?
- Tempering of a material does not improve its__________?
- Heat flow across a hollow sphere of inner radius ‘r1’ and outer radius ‘r2’ is directly proportional to__________?
- Plasma is__________?
- Materials having resistivity ranging from 1 to 100 ohm. cm is termed as__________?
- Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel ?
- The most important requirement for aluminium industry is the availability of cheap __________?
- Which of the following is a boiler accessory i.e., not a boiler mounting ?
- What is the value of included angle of a triangular notch for maximum discharge ?
- Diamagnetic materials__________?
- The hardenability of steel decreases with__________?
- For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?
- Brittleness induced due to the presence of sulphur in steel can be reduced by adding__________?
- Closeness of packing is maximum in case of __________ crystal lattice?
- In the Bayer’s process, bauxite is digested under pressure using __________?
- __________ of hard alloy and tool steel is done to make it easily machinable ?
- At 100% relative humidity, the dew point temperature of moist air is__________?
- In a neutral solution__________?
- Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion ?
- Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
- Maximum permissible air velocity in pipelines is about __________ metre/second ?
- Resilience of a bolt can be increased by increasing its __________?
- __________ temperature remains constant during adiabatic saturation process of unsaturated air ?
- The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is__________?
- Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent ?
- Work done by a/an __________ process is determined by ∫p. dv ?
- In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) ?
- Induced draft fans provided in large thermal power plant boilers have __________ blades?
- Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?
- Wood is a/an __________ material ?
- In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that ?
- Steel balls are manufactured by__________?
- __________ are normally subjected to sub-zero treatment?
- Auto collimator is used to check__________?
- __________ fluid force is not considered in the Navier-Stokes equation?
- The most important consideration in value engineering is the__________?
- Which of the following is not an explosive ?
- ‘Ice point’ is designated on Fahrenheit temperature scale by__________?
- Maximum consumption of limestone is in the __________ industry?
- Dies for wire drawing are generally made of__________?
- Which of the following is an undesirable property of slag produced during the Pyrometallurgical method of metal extraction from its ore ?
- Copper deposits are found in India at the following location ?
- Out of the following, the joint produced by __________ has the lowest strength?
- Aluminium is extracted from__________?
- If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor?
- Metalloids__________?
- Use of flux during soldering is done to__________?
- __________ is the most suitable lubricant for drawing mild steel wires?
- Fog is an example of colloidal system of__________?