In which of the following welding methods, the molten metal is poured for joining the metals ?
(a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding
Description : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods : (A) Butt welding and Seam welding (B) Hydrogen shielding and Projection welding (C) Seam welding and Coated electrode welding (D) Coated electrode welding and Hydrogen shielding
Last Answer : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods : (A) Butt welding and Seam welding (B) Hydrogen shielding and Projection welding ... Seam welding and Coated electrode welding (D) Coated electrode welding and Hydrogen shielding
Description : In which case, molten metal is used to do welding? (i) Groove type (ii) spot type (iii) Plug type (iv) None
Last Answer : (iii) Plug type
Description : Brazing filler metal used for joining steel plates (A) Melts below the melting points of base metals (B) Melts below 300°C (C) Is copper phosphorous alloy
Last Answer : (A) Melts below the melting points of base metals
Description : Brazing is the joining of metals (A) Without melting the base metal (B) With a non-ferrous filler (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : Option C
Description : Electric welding equipment works best at A) Low voltage and low current B) Low Voltage and high current C) High voltage and low current D) High voltage and high current
Last Answer : Electric welding equipment works best at Low Voltage and high current
Description : The commonly used gases in tungsten arc welding are 1.Hydrogen and oxygen 2.Hydrogen and organ 3.Hydrogen and helium 4.Helium and argon
Last Answer : The commonly used gases in tungsten arc welding are Helium and argon
Description : For arc welding current range is usually (1) 10 to 15 A (2) 30 to 40 A (3) 50 to 100 A (4) 100 to 350 A
Last Answer : For arc welding current range is usually 100 to 350 A
Description : Spot welding is used for (1) Thin metal (3) Castings only (2) Rough and irregular surface (4) Thick sections
Last Answer : Spot welding is used for Thin metal
Description : The electrode rod used for welding uses a coating on it
Last Answer : The electrode rod used for welding uses a coating on it to give a vapour to serve as a shielding gas to protect the weld area from atmospheric contamination and to provide slag to protect the welded area
Description : The supply for arc welding is :
Last Answer : The supply for arc welding is : Low voltage, high current ac or dc voltage
Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous
Last Answer : (i) Aluminium oxide (slag). *
Description : Joining of thin foils is preferred to be done by (A) Gamma rays (B) X-rays (C) Microwaves (D) Gas welding
Description : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.
Last Answer : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.
Description : Dittus-Boelter equation cannot be used for molten metals mainly due to its very low (A) Prandtl number (B) Grashoff number (C) Thermal conductivity (D) Viscosity
Last Answer : (A) Prandtl number
Description : The Dittus-Boelter equation for convective heat transfer [(i.e. h = 0.023 (K/D) (Re) 0.8 (Pr) 0.4 ] cannot be used for (A) Low Reynold's number (B) Very low Grashoff number (C) Molten metals (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which of the following liquid metals has the highest thermal conductivity? (A) Molten sodium (B) Molten lead (C) Mercury (D) Molten potassium
Last Answer : (A) Molten sodium
Description : Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in ... is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin
Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury
Description : Which of the following metals can be obtained from its ore only by electrolysis of a molten salt ? w) cobalt x) chromium y) copper z) sodium
Last Answer : ANSWER: Z -- SODIUM
Description : Electrometallurgical methods of metal extraction is normally used for those metals (A) Whose oxide/ore is not reduced by carbon (B) Which fall in the category of alkali & alkaline earth metals (C) Which stands higher in the electrochemical series of the metal (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : X-rays can be used (1) for cutting and welding of metals. (2) to detect heart diseases. (3) to detect defects in precious stones and diamonds. (4) to detect gold under the earth.
Last Answer : (3) to detect defects in precious stones and diamonds. Explanation: X-rays are used to detect and photograph defects of internal structure of a body such as metals, machine parts, cracks in wood ... , etc. They can reveal inhomogeneities- such as inclusions, lattice defects, etc in gems and stones.
Description : Pick out the wrong statement. (A) LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals (B) The minimum temperature, at which a petroleum oil vapor catches ... about 30-50 Nm3 of gas (D) Maximum yield of naphthalene is obtained on distillation of crude oil
Last Answer : (B) The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point
Description : Low purity oxygen is used for (A) L.D. steel making (B) Cutting and welding of metals (C) Medicinal purposes (D) Chemical oxidation processes
Last Answer : (D) Chemical oxidation processes
Last Answer : to detect defects in precious stones and diamonds.
Description : Is the center of the Earth really molten metal?
Last Answer : answer:For the Skeptic this site is also for you and has some information. Thanks http://www.halfpasthuman.com/alsoaintwhatitusedtobe.html
Description : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as
Last Answer : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. ... Smelting B. Calcination C. Roasting D. Liquition
Description : In extractive metallurgy of lead, the reduction of the roasted ore to the molten metal by heating with coke is called
Last Answer : In extractive metallurgy of lead, the reduction of the roasted ore to the molten metal by heating with ... B. roasting C. calcination D. None of these
Description : Is Steel rod Be heated into a molten metal is example of a phase change?
Last Answer : Feel Free to Answer
Description : Which is the most commonly used molten metal for cooling of nuclear reactors? (A) Calcium (B) Sodium (C) Mercury (D) Zinc
Last Answer : (B) Sodium
Description : Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor
Last Answer : (B) Research reactor
Description : Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons
Last Answer : (A) Rapid heat transfer from the core
Description : Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor. (A) Homogeneous (B) Graphite moderated (C) Fast breeder (D) Enriched uranium (3% U-235) fuelled
Last Answer : (C) Fast breeder
Description : The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute
Last Answer : (A) Electromagnetic
Description : Which of the following is not used as a medium for high temperature heating ? (A) Dowtherm (B) Mercury (C) Liquid metal (e.g. molten sodium) (D) Fused salts (e.g., an eutectic mixture of 53% KNO3 , 40% NaNO2and 7% NaNO3 )
Last Answer : (B) Mercury
Description : Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) (A) V/A (B) V/A2 (C) V2/A (D) V2/A2
Last Answer : (D) V2/A2
Description : A pycnometer is used for the measurement of (A) Flow rate of molten metal (B) Specific gravity of a liquid (C) Composition of alloys (D) Concentration of a solution
Last Answer : Option B
Description : Dephosphorization of molten pig iron is favoured by (A) Oxidising and basic slag (B) Reducing and basic slag (C) High activity co-efficient of phosphorous in metal (D) Oxidising and neutral slag
Description : Uniform ramming of sand in green sand moulding process leads to (A) Reduced chance of gas porosity (B) Greater dimensional stability of the casting (C) Uniform flow of molten metal into the mould cavity (D) Less sand expansion type of casting defect
Description : Addition of silicon to cast iron (A) Promotes graphite module formation (B) Improves its ductility (C) Does not promote graphite flakes formation (D) Increases the fluidity of molten metal
Last Answer : Option D
Description : During pudding (A) Molten metal is kept clear of the fuel (B) Carbon is converted into carbonic acid gas (C) Silicon forms a slag (D) All the above
Last Answer : Answer: Option D
Description : Main advantage of 3-piece P F Mould is? (i) To overcome fin defect.* (ii) To prevent the flaw of molten metal (iii) To make proper weld size (iv) None to the above
Last Answer : (i) To overcome fin defect.*
Description : In electrical resistance welding, distortion results from the use of improper (A) Clamping methods (B) Electrodes (C) Current (D) Filler material
Last Answer : (A) Clamping methods
Description : If you poured fresh concrete for a patio and a critter walked through it would you just leave it be?
Last Answer : It depends on the critter. If the critter was a horse or a hippo, I think the sizes of the holes their feet would leave would be unsafely large. I'd definitely fill them in. If the quadruped was a cow ... the concrete. If I was able to do that, then I'd add some hearts and smiles to her artistry.
Description : Once a cup of hot coffee is poured how soon should you finish it?
Last Answer : Before the milk you put into it turns sour.
Description : Shouldn't the cream be poured in before the coffee?
Last Answer : Yes, I do that at home. But stirring or just walking to work with a cup in hand mixes it up easily enough.
Description : Can concrete be poured in the rain?
Last Answer : No, inadvisable.
Description : What is it about Root Beer that makes it so much frothier when poured?
Last Answer : Carbonation.
Description : A can of paint that you had just purchased at Wal Mart fell over on your back seat in the car and poured paint onto the seat. What would you do?
Last Answer : answer:I think what Walmart is doing for you is appropriate. Sure, the can should have been sealed better, but it wasn't their fault you placed the can on a seat where it could easily fall over. A more ... gone back to buy a new gallon. I would have placed the blame on myself. but that's just me
Description : What do you think should be the punishment for the "Hot Sauce Mom" who poured hot sauce in her 7 year old son's mouth and put him in a cold shower?
Last Answer : Someone larger, stronger, and in a position of authority over her should pour hot sauce into her mouth and scream in her face while she’s in a cold shower. Poetic justice.
Description : When poured onto cereal, what is milk?
Last Answer : answer:I've never thought about this before. It's always just been milk. I suppose I would go with a sauce. I think it loses the beverage category since you are using it to eat your ... You are technically putting it on top of your cereal (similar to using spaghetti sauce on spaghetti noodles).
Description : What is the thing which, Once poured out, Cannot be gathered again? -Riddles
Last Answer : Rain, or rainfall.