Related Questions

A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
A increase
B decrease
C remain unaffected
D have its shape changed
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
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
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
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
In permanent mould casting method
A Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
B Molten metal is poured and allowed to solidify while the mould is revolving
C Molten metal is forced into mould under high pressure
D None of the above
A uniformly loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
A One-fourth
B One-third
C One-half
D Twice
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
A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will
A Sink to bottom
B Float over fluid
C Partly immersed
D Be fully immersed with top surface at fluid surface
A metal with specific gravity of o floating in a fluid of same specific gravity a will
A sink to bottom
B float over fluid
C partly immersed
D be fully immersed with top surface at fluid surface

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