Cemented carbide tools are not found to be suitable for cutting
Brass
Cast iron
Aluminium
Steel
Correct Answer :
D. Steel
Related Questions
Inconel contains
65% nickel, 15% chromium and 20% iron
68% nickel, 29% copper and 3% other constituents
80% nickel and 20% chromium
80% nickel, 14% chromium and 6% iron
Which of the following is an amorphous material?
Mica
Silver
Lead
Glass
The portion of the blast furnace below its widest cross-section is called
Hearth
Stack
Bosh
Throat
An example of amorphous material is
Zinc
Lead
Silver
Glass
Cartridge brass can be
Cold rolled into sheets
Drawn into wires
Formed into tube
Any one of these
Nodular cast iron is produced by adding ________ to the molten cast iron.
Nickel
Chromium
Copper
Magnesium
Phosphor bronze contains
0.5% of phosphorous
1% phosphorous
2.5% phosphorous
None of the above
Brass is an alloy of
Copper and zinc
Copper and tin
Copper, tin and zinc
None of these
Stress relaxation is the phenomenon
In which parts are not loaded
In which stress remains constant on increasing load
In which deformation tends to loosen the joint and produces a stress reduced
Stress reduces on increasing load
Shock resistance of steel is increased by adding
Nickel
Chromium
Nickel and chromium
Sulphur, lead and phosphorus
Following elements have face-centred cubic structure
Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
Mg, Zn, Ti, Zr, Br, Cd
A iron (below 910°C and between 1400 to 1539°C), W
All of the above
German silver contains
1% silver
2.5% silver
5% silver
10% silver
Duralumin contains
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
10% aluminium and 90% copper
90% magnesium and 9% aluminium with some copper
The purpose of heat treatment is to
Relieve the stresses set up in the material after hot or cold working
Modify the structure of the material
Change grain size
Any one of these
Corundum contains more than 95%
Steel
Al2O3
SiO2
MgO
Induction hardening is basically a
Carburising process
Surface hardening process
Core hardening process
None of these
The metallic structure of mild steel is
Body centred cubic
Face centred cubic
Hexagonal close packed
Cubic structure
The alloy used for making electrical resistances and heating elements is
Nichrome
Invar
Magnin
Elinvar
Hardness of lower bainite (tempered martensite) is about
RC 65
RC 48
RC 57
RC 80
The hardness and tensile strength in austenitic stainless steel can be increased by
Hardening and cold working
Normalising
Martempering
Full annealing
The cupola is used to manufacture
Pig iron
Cast iron
Wrought iron
Steel
Which is false statement about normalizing? Normalizing is done to
Refine grain structure
Reduce segregation in casting
Improve mechanical properties
Induce stresses
The surface hardness of the following order is achieved by nitriding operation
600 VPN
1500 VPN
1000 to 1100 VPN
250 VPN
The temperature required for full annealing in hypereutectoid steel is
30°C to 50°C above upper critical temperature
30°C to 50°C below upper critical temperature
30°C to 50°C above lower critical temperature
30°C to 50°C below lower critical temperature
Normalising of steel is done to
Refine the grain structure
Remove strains caused by cold working
Remove dislocations caused in the internal structure due to hot working
All of the above
In basic Bessemer process, the furnace is lined with
Silica bricks
A mixture of tar and burnt dolomite bricks
Both (A) and (B)
None of these
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
Chromium
Nickel
Vanadium
Cobalt
The composition of silver solder is
Silver, copper, zinc
Silver, tin, nickel
Silver, lead, zinc
Silver, copper, aluminium
Which of the following elements does not impart hardness to steel?
Copper
Chromium
Nickel
Silicon
Which of the following is the binding material in cemented carbides?
Cobalt
Nickel
Vanadium
Iron