______________ can replace tungsten in high speed steel ?
A. Chromium
B. Vanadium
C. Cobalt
D. Molybdenum
Materials and Construction
Which of the following is not an alloy of tin ?
Which of the following is not an alloy of tin ?
A. White-bearing metal
B. Pewter type metal
C. Soft solder
D. German silver
When the steel is subjected to normalising, its ______________ decreases?
When the steel is subjected to normalising, its ______________ decreases?
A. Yield point
B. Ductility
C. Ultimate tensile strength (UTS)
D. None of these
Concentrated HCl at 30°C can be stored in a vessel made of ________________________?
Concentrated HCl at 30°C can be stored in a vessel made of ________________________?
A. PTFE and porcelain
B. Cast iron and aluminium
C. Stainless steel and high silicon cast iron
D. None of these
German silver in an alloy of________________?
German silver in an alloy of________________?
A. Copper, nickel and zinc
B. Copper, aluminium and silver
C. Silver, zinc and aluminium
D. Silver, nickel and zinc
Work hardening of a material ________________?
Work hardening of a material ________________?
A. Decreases its tensile strength
B. Decreases its ductility
C. Increases its ductility
D. Does not affect its ductility
Which of the following is a non-magnetic material ?
Which of the following is a non-magnetic material ?
A. Cobalt
B. Zinc
C. Nickel
D. None of these
18/8 steel is a/an __________ stainless steel ?
18/8 steel is a/an __________ stainless steel ?
A. Austenitic
B. Ferritic
C. Martensitic
D. None of these
Tin vessels are corroded by____________________?
Tin vessels are corroded by____________________?
A. Anhydrous ammonia
B. Aromatic solvents
C. Synthetic detergent solution
D. None of these
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?
A. Dilute HCI
B. Acetic acid
C. Concentrated H2SO4
D. None of these