A. Melts below the melting points of base metals
B. Melts below 300°C
C. Is copper phosphorous alloy
D. Is copper
Correct Answer: Melts below the melting points of base metals ✔
Last Updated: February 11, 2019
Related MCQs
- The activity of pure hydrogen gas at 1000°C and 5 atm pressure__________?
- Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ?
- __________ metal is used as a bearing liner material?
- Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C?
- The ‘laughing gas’ is__________?
- Heat transfer by __________ is almost absent in case of fluidised bed drying operation?
- What is the range of tempering temperature (°C) for most of the materials ?
- Boiler draught of 10 mm water column is equivalent to__________?
- Surface tension of a liquid__________?
- Gas turbine normally employs a constant __________ cycle?
- Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method?
- An example of unsteady non uniform flow is the flow of liquid under pressure through a__________?
- A material subjected __________ must have high resilience?
- A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place__________?
- Lead is added to 60:40 brass primarily to improve__________?
- Glass reacts with__________?
- Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of__________?
- Which one can be directly solidified from gaseous state without entering into liquid state ?
- Cold heading or upsetting is categorised as the __________ process ?
- The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm.mole, its fugacity at 300 K would be__________?
- The most abundant metal present in the earth’s crust is__________?
- A material being tested for endurance strength is subjected to the __________ load ?
- Notched bar test is used for testing the __________ of a material?
- The unit of gc is __________?
- One of the methods of purification of leach liquor is ion exchange, which involves__________?
- Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh ?
- Silicon percentage in acid resistant cast iron is about __________?
- The atmospheric temperature during melting of ice/snow (in the atmosphere)__________?
- __________ is not a case hardening process ?
- Calorific value of __________ are almost same?
- Identify the correct statement with reference to the extractive metallurgy of aluminium ?
- The main charge in blast furnace is usually__________?
- Speed of a submarine in deep sea & that of an aeroplane is measured by a/an__________?
- Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel?
- In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of__________?
- Removal of non-condensable from steam or other vapour is termed as the __________ process?
- __________ cannot increase the fatigue strength of a material?
- Production of a hollow product by inflation of a tube or parison is called the __________ process?
- Coarse grained steels have__________?
- Unbreakable crockeries are made from __________ polymers?
- A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________?
- Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?
- Hot & cold working of material causes its __________ deformation?
- Thermit welding is categorised as the __________ welding ?
- Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and __________?
- As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint ?
- Often earing defects are found during deep drawing operation, because the __________?
- Plants produce carbohydrates from the CO2 present in the atmosphere by__________?
- . The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam?
- __________ is not a heat treatment process ?
- __________ is not used as the control rod material in a nuclear reactor ?