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- Question
Thermosetting plastics are those materials which
Options- A. are formed into shape under heat and pressure and results in a permanently hard product
- B. do not become hard with the application of heat and pressure and no chemical change occurs
- C. are flexible and can withstand considerable wear under suitable conditions
- D. are used as a friction lining for clutches and brakes
- Correct Answer
- are formed into shape under heat and pressure and results in a permanently hard product
- 1. The temperature point at which the change ends on heating the steel is called
Options- A. lower critical point
- B. upper critical point
- C. point of recalescence
- D. point of decalescence Discuss
- 2. Phosphor bronze has
Options- A. high resistance to corrosion
- B. good wearing qualities and high elasticity
- C. valuable cold working property
- D. all of these Discuss
- 3. For the pipe fitting like elbow, tee, union etc., which of the following is preferred?
Options- A. Pig iron
- B. Malleable iron
- C. Spheroidal graphite cast iron
- D. High carbon steel Discuss
- 4. The ductility is the property of a material due to which it
Options- A. can be drawn into wires
- B. breaks with little permanent distortion
- C. can be rolled or hammered into thin sheets
- D. can resist fracture due to high impact loads Discuss
- 5. A steel with 0.8% carbon is known as
Options- A. eutectoid steel
- B. hyper-eutectoid steel
- C. hypo-eutectiod steel
- D. none of these Discuss
- 6. The process used for relieving the internal stresses previously set up in the Metal and for increasing the machinability of steel, is
Options- A. normalising
- B. full annealing
- C. process annealing
- D. spheroidising Discuss
- 7. The malleability is the property of a material due to which it can be rolled or hammered into thin sheets.
Options- A. Agree
- B. Disagree Discuss
- 8. The process which improves the machinability of steels, but lowers the hardness and tensile strength, is
Options- A. normalising
- B. full annealing
- C. process annealing
- D. spheroidising Discuss
- 9. Silicon in cast iron
Options- A. makes the iron soft and easily machinable
- B. increases hardness and brittleness
- C. makes the iron white and hard
- D. aids fusibility and fluidity Discuss
- 10. The delta-iron possesses a body centred cubic space lattice.
Options- A. Correct
- B. Incorrect Discuss
Engineering Materials problems
Search Results
Correct Answer: upper critical point
Correct Answer: good wearing qualities and high elasticity
Correct Answer: Malleable iron
Correct Answer: can be drawn into wires
Correct Answer: eutectoid steel
Correct Answer: process annealing
Correct Answer: Agree
Correct Answer: spheroidising
Correct Answer: makes the iron soft and easily machinable
Correct Answer: Correct
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