Tuesday, August 25, 2009

Mechanical Engineering Board Exam Questions Part 3






Source: Machinery's Handbook
Topic: Strength of Materials, Springs and Wire Ropes


Answers in RED.

1. These washer type springs can sustain relatively large loads with small deflections, and the loads and deflections can be increased by stacking the springs.
a. Volute springs
b. Torsion bars
c. Belleville
d. Flat springs

2. These springs are often used on army tanks and heavy field artillery, and seldom find additional uses because of their high cost, long production time, difficulties in manufacture, and unavailability of a wide range of materials and sizes
a. Volute springs
b. Torsion bars
c. Belleville
d. Flat springs

3. These springs are often used to overcome operating space limitations in various products such as electric switches and relays.
a. Volute springs
b. Torsion bars
c. Belleville
d. Flat springs

4.The ______ of a wire rope is the direction of the helical path in which the strands are laid and, similarly, the lay of a strand is the direction of the helical path in which the wires are laid.
a. lay
b. Strand Construction
c. stranding
d. ley

5. In ______, the wires and strands are laid in the same direction.
a. regular lay
b. alternate lay
c. lang lay
d. double lay


6. In a wire rope designation 6 X 7, the first number stand for.
a. nominal diameter of the wire rope (in mm)
b. diameter of each strand (in mm)
c. wires per strand,
d. number of strands

7. 6 X 7 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

8. 6 X 19 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

9. 8 X 19 class of wire rope is also known as...
a.Standard Hoisting Rope
b.Extra Flexible Hoisting Rope
c.Standard Coarse Laid Rope
d. Special Flexible Hoisting Rope

10. _____ type of wire rope core is used for small ropes such as sash cord and aircraft cord.
a. Asbestos cores
b. Fiber
c. Cotton
d. wire-strand core

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