Discussion
Home ‣ Mechanical Engineering ‣ Engineering Materials Comments
- Question
The quenching of steel from the upper critical point results in a fine grained structure.
Options- A. Agree
- B. Disagree
- Correct Answer
- Agree
- 1. The coke in the charge of blast furnace
Options- A. controls the grade of pig iron
- B. acts as an iron-bearing mineral
- C. supplies heat to reduce ore and melt the iron
- D. forms a slag by combining with impurities Discuss
- 2. Crystal structure of a material is, generally, examined by
Options- A. naked eye
- B. optical microscope
- C. metallurgical microscope
- D. X-ray techniques Discuss
- 3. The number of slots in a 25 mm castle nut is
Options- A. 2
- B. 4
- C. 6
- D. 8 Discuss
- 4. A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.
Options- A. True
- B. False Discuss
- 5. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as
Options- A. angular bevel gears
- B. crown bevel gears
- C. internal bevel gears
- D. mitre gears Discuss
- 6. Closed packed hexagonal space lattice is found in
Options- A. zinc, magnesium, cobalt, cadmium, antimony and bismuth
- B. gamma-iron, aluminium, copper, lead, silver and nickel
- C. alpha-iron, tungsten, chromium and molybdenum
- D. none of the above Discuss
- 7. Tungsten when added to steel __________ the critical temperature.
Options- A. does not effect
- B. lowers
- C. raises Discuss
- 8. The property of a material due to which it breaks with little permanent distortion, is called
Options- A. brittleness
- B. ductility
- C. malleability
- D. plasticity Discuss
- 9. Free carbon in iron makes the metal
Options- A. soft and gives a coarse grained crystalline structure
- B. soft and gives a fine grained crystalline structure
- C. hard and gives a coarse grained crystalline structure
- D. hard and gives a fine grained crystalline structure Discuss
- 10. Thermoplastic materials 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 Discuss
Engineering Materials problems
Search Results
Correct Answer: supplies heat to reduce ore and melt the iron
Correct Answer: X-ray techniques
Correct Answer: 6
Correct Answer: False
Correct Answer: crown bevel gears
Correct Answer: zinc, magnesium, cobalt, cadmium, antimony and bismuth
Correct Answer: raises
Correct Answer: brittleness
Correct Answer: soft and gives a coarse grained crystalline structure
Correct Answer: do not become hard with the application of heat and pressure and no chemical change occurs
Comments
There are no comments.More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.