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.Management Sciences
Category: Materials and Construction
Alpha iron is stable ______________ °C?
0
A. Above 1403
B. Upto 910
C. Above 1800
D. Between 910 & 1403
18-4-1 high speed steel contains 18%, 4% and 1% respectively of____________________?
A. Tungsten, vanadium and chromium
B. Tungsten, chromium and vanadium
C. Vanadium, chromium and tungsten
D. Chromium, tungsten and vanadium
Which of the following is not a non-ferrous alloy ?
A. Meehanite
B. Magnalium
C. Gun metal
D. Muntz metal
Nickel and copper are the basic constituents of__________________?
A. Hastelloy
B. Monel metal
C. German silver
D. Inconel
Addition of tungsten to steel imparts___________________?
A. Magnetic properties
B. Cutting hardness
C. Corrosion resistance
D. Ductility
Hardening of steel is not possible unless it is heated ______________ critical point?
A. Above the highest
B. Above the lowest
C. Between the first & second
D. Between the second & third
Which of the following has the highest compressive strength ?
A. Wrought iron
B. Cast iron
C. Mild steel
D. High carbon steel
Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?
A. Plain carbon steel
B. Stainless steel
C. Rubber or durmet-20 lined
D. Lead
An alloy of iron containing 4% carbon is called________________?
A. High carbon steel
B. Wrought iron
C. Mild steel
D. None of these
Silicon percentage in iron castings to have maximum hardness should be about__________________?
A. 0.3
B. 0.5
C. 0.8
D. 2.5
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