The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?
(A) 60 – 100
(B) 400 – 700
(C) 1200 -1500
(D) 2000 – 2300
Which of the following does not have a sharp melting point ?
(A) Thoria
(B) Glass
(C) Ice
(D) Pig iron
The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is ______________ BTU/hr?
(A) 100
(B) 200
(C) 1000
(D) 2000
For preparation of porous bearings by powder metallurgy, preferred particle shape is___________________?
(A) Spherical
(B) Nodular
(C) Irregular
(D) No preferred shape
_______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?
(A) Beryllium
(B) Zirconia
(C) Alumina
(D) Magnesia
Cobalt – 60 is used as a source of _____________ in medical therapy & industrial radiography?
(A) X-rays
(B) γ-rays
(C) α-rays
(D) β-rays
__________________ is used for tying the steel columns to concrete foundation?
(A) Grouting
(B) Eyebolt
(C) Anchor bolts
(D) Refractory castables
Alloys having more than 80% copper are generally more______________________?
(A) Abrasion resistant
(B) Corrosion resistant
(C) Prone to season cracking
(D) Machinable
Friction factor for fluid flow in pipe does not depend upon the________________?
(A) Pipe length
(B) Pipe roughness
(C) Fluid density & viscosity
(D) Mass flow rate of fluid
A material in which the atoms are arranged regularly in some directions but not in others, is termed as ‘mesomorphous material’; an example of which is_________________?
(A) Lead
(B) Glass
(C) Mica
(D) Silver