A. Makes it brittle
B. Increases its strength
C. Increases its hardness
D. Is desirable
Presence of nitrogen in steel___________________? Read More »
Materials and Construction A. Solid solution hardening
B. Screw dislocation
C. Strain ageing
D. Twinning
A. Silica
B. Fireclay
C. Silicon carbide
D. Corundum
Beehive coke ovens are made of ________________ bricks? Read More »
Materials and Construction A. High silicon iron, silicon rubber, Kel-F and Teflon
B. Mild steel and stainless steel
C. Cast iron, tin and aluminium
D. Copper, nickel and Monel
A. Dilute HCl
B. Acetic acid
C. Concentrated H2SO4
D. None of these
A. Is used as an alloying element for both ferrous & non-ferrous alloys
B. Is paramagnetic below 415° C (its Curie temperature)
C. Diamagnetic
D. Has a body centred cubic (bcc) crystal lattice structure
Nickel as a material of construction__________________? Read More »
Materials and Construction A. Price
B. Corrosion resistance
C. Thermal conductivity
D. Abundant availability
A. Fluorine (dry or wet)
B. Sulphuric acid
C. Phosphoric acid
D. None of these
Glass is corroded by________________? Read More »
Materials and Construction A. 6
B. 5
C. 3
D. 2
How many atoms are there per unit cell in a body centred cubic lattice system ? Read More »
Materials and Construction A. Mild steel
B. Phosphorous bronze
C. White metal alloys
D. None of these
Bush bearings are made of______________________? Read More »
Materials and Construction