1721. Titanium metal
Exists in three allotropic forms
Can not be welded
Is used in oceanographic and space exploration applications
None of these
✅ The correct answer is option C.
1724. Perspex is nothing but
Acrylic sheet
An elastomer
An alloy of lead and tin
Aluminium foil clad with bakelite
✅ The correct answer is option A.
1727. Ammonium chloride solution is stored/ treated in __________ vessels/pipes.
Plain carbon steel
Stainless steel
Rubber or durmet-20 lined
Lead
✅ The correct answer is option C.
1730. The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability?
Lead
Copper
Aluminium
Wrought iron
✅ The correct answer is option A.
1733. Cast iron is a __________ material.
Brittle
Ductile
Tough
Malleable
✅ The correct answer is option A.
1736. Phenol is not shipped in
Nickel lined steel tank cars
Galvanised or tin lined drums
Boxed glass carboys
Cast iron containers
✅ The correct answer is option D.
1739. Purity of electrical grade aluminium should be ≥ __________ percent.
95
99.5
85
90
✅ The correct answer is option B.
1741. Fatigue strength of a material increases by
Having notches in the specimen
Rise in temperature
Under stressing the specimen
Having scratches on the surface
✅ The correct answer is option C.
1743. Carbon content in plain carbon steel is __________ percent.
0.1 to 0.15
0.35 to 0.45
0.65 to 0.80
0.85 to 1.2
✅ The correct answer is option B.
1745. Concrete tank can be used to store
Alum
Ferrous sulphate
Sulphuric acid
Saturated brine
✅ The correct answer is option D.