_____________ moulding process cannot be used for thermoplastic plastics?
A. Compression
B. Extrusion
C. Injection
D. None of these
Materials and Construction
Which of the following metals in not used for coating of the base metal to guard it against corrosion ?
Which of the following metals in not used for coating of the base metal to guard it against corrosion ?
A. Lead
B. Cadmium
C. Magnesium
D. Aluminium
Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?
Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?
A. Bismuth
B. Arsenic
C. Antimony
D. Both B. and C.
Muntz metal is a/an alloys of____________________?
Muntz metal is a/an alloys of____________________?
A. Magnesium & tin
B. Ferrous material
C. Lead & tin
D. Copper & zinc
Hastelloy comprises of____________________?
Hastelloy comprises of____________________?
A. Copper and tin
B. Copper and nickel
C. Molybdenum and nickel
D. Lead and tin
Carbon content in steel is ___________________ percent?
Carbon content in steel is ___________________ percent?
A. 0.1-2
B. 4-6
C. 2-4
D. 0.001-0.01
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
A. Cast iron
B. Steel
C. Nickel
D. Karbate
Iron alloyed with carbon upto 2% is called___________________?
Iron alloyed with carbon upto 2% is called___________________?
A. Pig iron
B. Wrought iron
C. High carbon steel
D. None of these
Mild steel is a/an ______________ steel?
Mild steel is a/an ______________ steel?
A. Low carbon
B. Medium carbon
C. High carbon
D. High alloy
Amount of energy that a material can absorb before its fracture is a measure of its _________________?
Amount of energy that a material can absorb before its fracture is a measure of its _________________?
A. Toughness
B. Resilience
C. Malleability
D. Ductility