1964. Hot working of lead is carried out at
75° C
373° K
150° C
Room temperature
✅ The correct answer is option D.
1966. The carbonating tower used in Solvay process of soda ash manufacture is made of
Cast iron
Stainless steel
Karbate
Lead lined steel
✅ The correct answer is option A.
1968. Vycor, a widely used material for making ‘thermal wells’ in temperature measurement, is a
Cermet
Glass
Thermosetting plastic
Metallic alloy
✅ The correct answer is option B.
1970. The temperature at which new grains are formed in the metal is called the __________ temperature.
Eutectic
Recrystallisation
Upper critical
Lower critical
✅ The correct answer is option B.
1972. Zinc is not used
For producing zinc base die casting alloys
In its oxide form as pigments
As anode for corrosion prevention in boiler
As an alloying element in various bronzes
✅ The correct answer is option D.
1974. Dielectric strength of a material is
Its energy stroage capacity
A magnetic property
Its capacity to resist the flow of current
Its capacity to withstand high voltage
✅ The correct answer is option D.
1976. Presence of silicon in steel
Is in the form of free Si
Indicates that steel is not deoxidised properly
Decreases the blow holes formation tendency in castings
None of these
✅ The correct answer is option C.
1979. Constituents of stellite are
Zinc, copper and nickel
Cobalt, chromium and tungsten
Zinc, aluminium and nickel
Nickel, cobalt and vanadium
✅ The correct answer is option B.
1982. Liquid ammonia is shipped in __________ containers.
Steel
Aluminium
Glass
Lead lined
✅ The correct answer is option C.
1985. In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of
Stainless steel
Cast iron
Lead lined steel
Rubber lined steel
✅ The correct answer is option B.