Mem Chapter No. 4
- 1.1) The addition of which of the following improves machining of copper?
- A.
A. Sulphur
- B.
B. Vanadium
- C.
C. Tin
- D.
D. Zinc
- 2.2). A solder consists of
- A.
A. Lead and tin
- B.
B. Tin and white metal
- C.
C. Zinc and lead
- D.
D. Zinc and tin
- E.
E. Tin and antimony
- 3.3). Persence of lead in brass improves
- A.
A. Machining properties
- B.
B. Hardenability
- C.
C. Ductility
- D.
D. Malleability
- E.
E. Fatigue resistance
- 4.4). Brass in an alloy of
- A.
A. Copper and tin
- B.
B. Copper and zinc
- C.
C. Copper and lead
- D.
D. Copper and nickel
- E.
E. Copper and aluminium
- 5.5). Bronze is an alloy
- A.
A. Copper, lead and tin
- B.
B. Copper, zinc and tin
- C.
C. Copper, zinc and tin
- D.
D. Zinc, nickel and tin
- E.
E. Nickel, aluminium and copper
- 6.6) Babbit metal is an alloy of
- A.
A. Tin, antimony and copper
- B.
B. Tin, antimony and lead
- C.
C. Tin, copper and lead
- D.
D. Tin, zinc and copper
- E.
E. Lead, zinc and copper
- 7.7) Bell metal is an alloy of
- A.
A. Coper, tin, lead and zinc
- B.
B. Copper, antimony, aluminium and zinc
- C.
C. Copper, lead and tin
- D.
D. Copper and tin
- E.
E. Copper and lead
- 8.8). Fusible plug for boilers consists of
- A.
A. Lead, tin and mercury
- B.
B. Copper, lead and tin
- C.
C. Zinc, copper and lead
- D.
D. Bismuth, lead and tin
- E.
E. Zinc, bismuth and tin
- 9.9). White metal contains
- A.
A. Lead and bismuth
- B.
B. Mercury and zinc
- C.
C. Lead and zinc
- D.
D. Lead and copper
- E.
E. Copper, zinc and mercury
- 10.10). Major constituent of phosphor bronze is
- A.
A. Zinc
- B.
B. Copper
- C.
C. Lead
- D.
D. Aluminium
- E.
E. Phosphorous
- 11.11) Constantan is an alloy containing
- A.
A. Copper and zinc
- B.
B. Copper and nickel
- C.
C. Lead and zinc
- D.
D. Zinc and nickel
- E.
E. Lead and copper
- 12.12). Alpha brass is a (an)
- A.
A. Inermediate phase
- B.
B. Interstitial compound
- C.
C. Substitutional solid solution
- D.
D. None of the above
- 13.13). Silicon when added to copper increases its
- A.
A. Machinability
- B.
B. Brittleness
- C.
C. Malleability
- D.
D. Hardness
- E.
E. Electrical conductivity
- 14.14) In Muntz metal, if 1% of tin is added it forms _____ ANSWER: naval brass
- A.
A. admiralty brass
- B.
B. naval brass
- C.
C. both a. and b.
- D.
d. none of the above
- 15.15) What is the composition of cartridge brass?
- A.
A. 50 % Cu and 50 % Zn
- B.
B. 60 % Cu and 40 % Zn
- C.
C. 70 % Cu and 30 % Zn
- D.
D. 20 % Cu and 80 % Zn
- 16.16) Which of the following cold working operations are suitable for a brass?
- A.
A. Cold rolling
- B.
B. Deep drawing
- C.
C. Both a. and b.
- D.
D. None of the above
- 17.17) A bearing material should not possess the characteristic of high ______.
- A.
A. coefficient of friction
- B.
B. hardness
- C.
C. melting point
- D.
D. thermal conductivity
- 18.18. An alloy which does not contain copper is
- A.
(a) Bronze
- B.
(b) Magnalium
- C.
(c) Brass
- D.
(d) Bell metal
- 19.19) Which of the following is not a property of copper alloy?
- A.
A. High electrical conductivity
- B.
B. High thermal conductivity
- C.
C. High strength
- D.
D. None of the above
- 20.20) Copper when alloyed with zinc is known as
- A.
A. Brass
- B.
B. Bronze
- C.
C. Babbits
- D.
D. All of the above
- 21.21) Brass is an alloy of Answer: Option A
- A.
A. copper and zinc
- B.
B. copper and tin
- C.
C. copper, tin and zinc
- D.
D. none of these
- 22.22) Which of the following has a fine gold colour and is used for imitation jewellery?
- A.
A. Silicon bronze
- B.
B. Aluminium bronze
- C.
C. Gun metal
- D.
D. Babbit metal
- 23.23) Brass is an alloy of Answer:
- A.
A. copper and zinc
- B.
B. copper and tin
- C.
C. copper, tin and zinc
- D.
D. none of these
- 24.24) Which of the following has a fine gold colour and is used for imitation jewellery?
- A.
A. Silicon bronze
- B.
B. Aluminium bronze
- C.
C. Gun metal
- D.
D. Babbit metal
- 25.25) Cartidge brass can be
- A.
A. cold rolled into sheets
- B.
B. drawn into wires
- C.
C. formed into tube
- D.
D. any one of these
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