Engineering Materials Questions

1-Aluminium Bronze is also known as :
(a) Muntz metal
(b) White metal
(c) Duraluminium
(d) Imitation gold

2-In case of power screws, what is the combination of materials used for the screw and the nut?
(a) Cast iron screw and mild steel nut
(b) Carbon steel screw and phosphor bronze nut
(c) Cast iron screw and cast iron nut
(d) Aluminium screw and alloy steel nut

3-The percentage of phosphorous in phosphor bronze is
(a) 0.1                (b) 1
(c) 11.1               (d) 98

4-Gunmetal, which is used in journal bearings, contains
(a) 88% Cu, 10% Sn, 2% Zn
(b) 80% Cu, 10% Zn, 10% Al
(c) 85% Cu, 5% Mg, 10% Al
(d) 85% Cu, 5% Sn, 10% Pb

5-Admirality Brass is used for
(a) Condenser Tubes
(b) Rivets
(c) Piston rods
(d) Utensils

6-Monel metal is an alloy of
(a) Iron and carbon
(b) Copper and zinc
(c) Aluminium and copper
(d) Copper and nickel

7-Babbit is an alloy of
(a) Sn, Cu, Sb and Pb
(b) Sn and Cu
(c) Sn, Cu and Pb
(d) Sn, Cu and Sb

8-Babbit lining is used on brass/bronze bearings to
(a) Increase bearing resistance
(b) Increase compressive strength
(c) Provide anti-friction properties
(d) Increase wear resistance
.
9-Why are babbit alloys used for bearing material?
(a) They have excellent embeddability
(b) They are relatively stronger than other bearing materials
(c) They do not lose strength with increase in temperature
(d) They have high fatigue strength

10-Babbitt are used for
(a) Gears          (b) Bearings
(c) Bolts            (d) Clutch liners

11-Tin base white metals are used where the bearings are subjected to
(a) Large surface wear
(b) Elevated temperatures.
(c) Light load and pressure
(d) High pressure and load
.
12-Columbium is a :
(a) Nuclear material
(b) Automobile material
(c) Film material
(d) Foam material

13-Duralumin Alloy contains aluminium and copper in the ratio of
%Al %Cu
(a) 94 4
(b) 90 8
(c) 88 10
(d) 86 12