Mechanical Engineering - Engineering Materials

46.
Y-alloy contains
3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium
3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium
4 to 4.5% magnesium, 3 to 4% copper and rest aluminium
5 to 6% tin, 2 to 3% copper and rest aluminium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
The steel scrap added in the charge of cupola controls the grade of cast iron produced.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
The main alloying elements high speed steel in order of increasing proportion are
vanadium, chromium, tungsten
tungsten, titanium, vanadium
chromium, titanium, vanadium
tungsten, chromium, titanium
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Babbit metal
Monel metal
Nichrome
Phosphor bronze
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
Which of the following metal is used for nuclear energy?
Uranium
Thorium
Niobium
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.