Acetylene gas holder is made of__________________?
A. Copper
B. Cast iron
C. Steel
D. Monel metal
Materials and Construction
Babbitt metals used for making bearings are _________________?
Babbitt metals used for making bearings are _________________?
A. Tin or lead based alloys
B. Short of antifrictional properties
C. Having homogenous microstructure
D. Yellow metals
Carbon percentage is the same in cast iron and_________________?
Carbon percentage is the same in cast iron and_________________?
A. Wrought iron
B. Pig iron
C. Mild steel
D. High silicon (14%) iron
Nickel (56%) and molybdenum (17%) alloys are called________________?
Nickel (56%) and molybdenum (17%) alloys are called________________?
A. Monel
B. Hastelloy C
C. Inconel
D. Bronzes
Specify the material of construction suitable for handling concentrated HNO3 at 100°C ?
Specify the material of construction suitable for handling concentrated HNO3 at 100°C ?
A. High silicon iron, Kel-F and Teflon
B. Tin and wood
C. Silicone rubber
D. Stainless steel
Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?
Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?
A. Tungsten steel
B. Molybdenum steel
C. Nickel-chrome steel
D. Cobalt steel
Heavy duty bearings are usually made of___________________?
Heavy duty bearings are usually made of___________________?
A. White metal
B. Phosphorous bronze
C. Monel
D. Zinc
Pure nickel is___________________?
Pure nickel is___________________?
A. Ferromagnetic above its curie point (i.e., 415°C)
B. Having h.c.p. crystal lattice
C. Ferromagnetic at room temperature
D. Not resistant to oxidation at high temperature
White metal is an alloy of___________________?
White metal is an alloy of___________________?
A. Lead, tin and cadmium
B. Copper, tin and zinc
C. Copper and lead
D. None of these
German silver used for decorative purposes contains maximum percentage of___________________?
German silver used for decorative purposes contains maximum percentage of___________________?
A. Silver
B. Copper
C. Zinc
D. Nickel