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- Question
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by
Options- A. dilute HCI
- B. acetic acid
- C. concentrated H2SO4
- D. none of these
- Correct Answer
- acetic acid
- 1. Addition of __________ in steel can help in increasing the depth of hardness.
Options- A. nickel
- B. chromium
- C. vanadium
- D. tungsten Discuss
- 2. Dielectric strength of a material is
Options- A. its energy stroage capacity.
- B. a magnetic property.
- C. its capacity to resist the flow of current.
- D. its capacity to withstand high voltage. Discuss
- 3. German silver used for decorative purposes contains maximum percentage of
Options- A. silver
- B. copper
- C. zinc
- D. nickel Discuss
- 4. Cast iron has very high
Options- A. compressive strength
- B. ductility
- C. shock resistance
- D. resistance to brittleness Discuss
- 5. Which of the following has the highest compressive strength?
Options- A. Wrought iron
- B. Cast iron
- C. Mild steel
- D. High carbon steel Discuss
- 6. Babbit metal used for bearings is a____base alloy.
Options- A. tin
- B. lead
- C. aluminium
- D. copper Discuss
- 7. Nickel (56%) and molybdenum (17%) alloys are called
Options- A. monel
- B. hastealloy C
- C. inconel
- D. bronzes Discuss
- 8. 18-4-1 high speed steel contains 18%, 4% and 1% respectively of
Options- A. tungsten, vanadium and chromium
- B. tungsten, chromium and vanadium
- C. vanadium, chromium and tungsten
- D. chromium, tungsten and vanadium Discuss
- 9. German silver in an alloy of
Options- A. copper, nickel and zinc.
- B. copper, aluminium and silver.
- C. silver, zinc and aluminium.
- D. silver, nickel and zinc. Discuss
- 10. Which of the following stainless steels is non-magnetic?
Options- A. Ferritic
- B. Martensitic
- C. Austenitic
- D. None of these Discuss
Materials and Construction problems
Search Results
Correct Answer: tungsten
Correct Answer: its capacity to withstand high voltage.
Correct Answer: copper
Correct Answer: compressive strength
Correct Answer: High carbon steel
Correct Answer: tin
Correct Answer: hastealloy C
Correct Answer: tungsten, chromium and vanadium
Correct Answer: copper, nickel and zinc.
Correct Answer: Austenitic
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