Related Questions

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth's early life and solidified into hard rock's called
A granite
B basalt
C igneous rocks
D sedimentary rocks
This is a solid shape that fits inside the mold and forms a hole in a cooled cast metal or molten plastic object:
A Core
B Cavity
C Prototype
D Hole mold
Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.
A Electromagnetic
B Axial flow
C Diaphragm
D Reciprocating
If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
A ARC
B Short ARC
C ARC length
D ARC blow
Which is the most commonly used molten metal for cooling of nuclear reactors?
A Zinc
B Sulphur
C Sodium
D Manganese
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?
A Silicon
B Sulphur
C Manganese
D Phosphorus
Which of the following welding method uses a pool of molten metal?
A Carbon arc welding
B Submerged arc welding
C TIG arc welding
D MIG arc welding
In a _______, the molten metal is poured and allowed to solidify while the mould is revolving.
A Die casting method
B Slush casting method
C Permanent mould casting method
D Centrifugal casting method
In order to deliver molten metal from pouring basin to gate, a ________ is used.
A Riser
B Sprue
C Core
D None of these
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

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