Maximum permissible sulphur content in steel is ______________ percent ?
(A) 0.015
(B) 0.055
(C) 0.505
(D) 0.805
A spring material should have low__________________?
(A) Elastic limit
(B) Deflection value
(C) Fatigue resistance
(D) None of these
A common disinfectant used in village wells for disinfection of water is __________________?
(A) Free chlorine
(B) Bromine
(C) Iodine
(D) Potassium permanganate
Which of the following is not an ore of copper ?
(A) Cryolite
(B) Azurite
(C) Chalcopyrite
(D) Malachite
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?
(A) Hard
(B) Soft
(C) Silicon carbide
(D) Aluminium oxide
Stainless steel is welded with difficulty because of____________________?
(A) Its high melting temperature
(B) Chances of cracking
(C) Oxide film formation
(D) Chromium carbide formation
_____________________ of grey cast iron produces white cast iron?
(A) Tempering
(B) Rapid heating
(C) Rapid cooling
(D) Slow cooling
Sudden fall of atmospheric pressure by a large amount is an indication of the_____________________?
(A) Rain
(B) Cold wave
(C) Storm
(D) Fair weather
Which of the following is not a charge material for cupola ?
(A) Limestone
(B) Iron scrap
(C) Iron ore
(D) Pig iron
Transformation range for ferrous material is the temperature interval during which ___________________ is formed during its heating?
(A) Cementite
(B) Austenite
(C) Martensite
(D) Pearlite