Important Paper ESE Mechanical Engineering
1. Which one of the following is the major alloying element in Invar?
(a) Aluminum
(b) Nickel
(c) Vanadium
(d) Copper
Answer: (b)
2. Liquid + solid (1) on cooling converting into solid (2) reaction is known as:
(a) Eutectoid reaction
(b) Eutectic reaction
(c) Peritectic reaction
(d) Peritectoid reaction
Answer: (c)
3. Structure of common glass is:
(a) Amorphous
(b) Partially crystalline
(c) Fully crystalline
(d) None of these
Answer: (d)
4. Injection moulding process used to produce thermoplastic matrix composites with fibre reinforcement normally gives:
(a) Short fibre composites
(b) Two layer structure composites
(c) Continuous fibre composites
(d) Single layer composites
Answer: (b)
5. ‘Whiskers’ are:
(a) Very thin metallic particles
(b) Very thin single crystals
(c) Very thin poly crystals
(d) Fiber particles of aspect ratio less than 10
Answer: (b)
6. Kevlar Epoxy composite is widely used in:
(a) Automobiles
(b) Aerospace
(c) Navy
(d) Interior decoration
Answer: (a)
7. Lead is widely used in:
(a) Transformers
(b) Switch gear
(c) Galvanized pipes
(d) Batteries
Answer: (d)
8. Solid material chemical bonds are:
(a) Ionic, molecular and fusion
(b) Covalent, fusion and fission
(c) Ionic, covalent and molecular
(d) Fission, molecular and ionic
Answer: (c)
9. Cleavage fracture is a form of:
(a) Brittle fracture
(b) Ductile fracture
(c) Elastic fracture
(d) Viscoelastic fracture
Answer: (a)
10. Admiralty brass is used for:
(a) Condenser tubes
(b) Rivets
(c) Piston rods
(d) Utensils
Answer: (a)
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