Related Questions

The casting method adopted for ornaments and toys of nonferrous alloys, is
A Permanent mould casting
B Slush casting
C Die casting
D Centrifugal casting
This is used in applications for nonferrous construction:
A Copper tubing
B Steel pipe
C PVC pipe
D Iron tubing
The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
A Ceramic
B Stellite
C Diamond
D Cemented carbide
Which metal oxide is an amphoteric oxide?
A iron
B aluminium
C sodium
D potassium
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
Which metal does not undergo corrosion due to the formation of oxide layer?
A Copper
B Iron
C Aluminium
D Zinc
নিম্নের কোন oxide টিকে উভধর্মী oxide বলে?
A CaO
B MgO
C ZnO
D CuO
The formation of oxide film on a metal due to atmospheric exposure reduces its
A Toughness
B Stiffness
C Creep limit
D All of the above
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
A lower pair
B higher pair
C self-closed pair
D force-closed pair
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above

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