1975. Trough of an apron conveyor is made of
Lead lined concrete vessel
Wood
Metal
Either B or C
✅ The correct answer is option D.
1978. Valves in pipe size of 2″ and under are normally made of
Wrought iron
Brass
Bronze
Monel
✅ The correct answer is option B.
1981. Wrought iron is a suitable material of construction for handling __________ solutions.
Dilute acidic
Concentrated acidic
Alkalis & alkaline
None of these
✅ The correct answer is option C.
1984. Duralumin is an alloy of
Aluminium, copper and manganese
Aluminium, nickel and silicon
Aluminium and nickel
None of these
✅ The correct answer is option A.
1987. Addition of tungsten to steel imparts
Magnetic properties
Cutting hardness
Corrosion resistance
Ductility
✅ The correct answer is option B.
1952. Babbit metal is not a
Tin base alloy
White metal
Lead base alloy
Pure metal
✅ The correct answer is option D.
1955. Presence of high phosphorous in cast iron increases its
Fluidity
Melting point
Shrinkage
Tensile strength
✅ The correct answer is option A.
1958. Invar used in thermocouples is an alloy of nickel and
Iron
Copper
Chromium
Lead
✅ The correct answer is option A.
1960. Which of the following is not a non-ferrous alloy?
Meehanite
Magnalium
Gun metal
Muntz metal
✅ The correct answer is option A.
1962. Light weight metallic alloy used in aircraft industry is
Aluminium
High silicon (14%) iron
Duralumin
Phosphor bronze
✅ The correct answer is option C.