A. Hardness
B. Toughness
C. Tensile strength
D. Wear resistance
Shock resisting steels should possess high___________________? Read More »
Materials and Construction A. Bromine
B. Dry chlorine & dry fluorine
C. Nitric acid (95% and fuming)
D. Phosphoric acid (95%) & sulphuric acid (95% and fuming)
A. Tensile strength
B. Softness & flexibility
C. Acid resistance
D. Alkali resistance
Plasticisers are added to polymers to improve their____________________? Read More »
Materials and Construction A. Sulphuric acid (10%)
B. Sea water
C. Hydrochloric acid
D. None of these
Graphite is corroded by_________________? Read More »
Materials and Construction A. Rubber
B. Acrylics
C. Lead
D. Plastics
Creep is not exhibited at low temperature by _____________________? Read More »
Materials and Construction A. Manganese
B. Carbon
C. Phosphorous
D. Silicon
A. Mainly tin (85%) and lead
B. Saw dust and iron dust mixture
C. Zinc and aluminium
D. Copper and aluminium
Babbitt metal (used for making bearings) comprises of__________________? Read More »
Materials and Construction A. Has very low strength
B. Cannot be heated
C. Is broken by small temperature changes
D. All A., B. and C.
Acid proof stoneware_________________? Read More »
Materials and Construction A. Aluminium
B. High silicon (14%) iron
C. Duralumin
D. Phosphor bronze
Light weight metallic alloy used in aircraft industry is________________? Read More »
Materials and Construction A. Wrought iron
B. High speed steel
C. Cast iron
D. Pig iron
Which one contains the least percentage of carbon ? Read More »
Materials and Construction