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Assertion (A): Aluminium alloys are cast in a hot chamber die casting machine. Reason (R): Aluminium alloys require high melting when compared to zinc alloys.

Assertion (A): Aluminium alloys are cast in a hot chamber die casting machine. Reason (R): Aluminium alloys require high melting when compared to zinc alloys. Correct Answer A is false but R is true

Concept:

Die casting is a moulding process in which the molten metal is injected under high pressure and velocity into a split mould die.

Die casting is categorized into two types namely -

  • Hot chamber and cold Chamber.
  • Metals like Zinc, tin and lead alloys are cast in hot chamber die casting having melting point below 390°C whereas aluminum alloys are cast in a cold chamber die casting machine.

Related Questions

Consider the following statements. (1) Hot chamber machine is used for casting zinc, tin and other low melting alloys (2) Cold chamber machine is used for die casting of ferrous alloys (3) Rapid cooling rate in die casting produces high strength and quality in many alloys Which of these statements are correct? 
An assertion and a reason are given below. Assertion: The phenomenon of nuclear fission generates great energy. Reason: The process in which a nucleus is broken into two parts is called nuclear fission. Choose the answer. A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. C. Both Assertion and Reason are false. D. Assertion is true but Reason is false.
In cold chamber die casting, rapid cooling of the castings is done as compared to the hot chamber die casting.
The chances of defects in the castings by cold chamber die casting are more than the castings produced by hot chamber die casting.
Amal preparing an alloy by mixing the other two alloys. The first alloy contains zinc and carbon in the ratio of 1 : 3 and the second alloy contains Aluminium and zinc in the ratio of 2 : 3 (both these alloys have only these elements in the solution). If the new alloy contains Aluminum and Zinc in the ratio of 3 : 5, what is the percentage of carbon in the new alloy?
Low melting point alloys can be cast in the cold chamber pressure die casting.
X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?
X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?
Two alloys of zinc and copper are combined in the ratio 3 : 5 by volume. The resultant alloy is a 45% zinc alloy. What will be the proportion of zinc in the first alloy if the proportion of zinc in the second is 70%?
The melting temperature of non-ferrous alloys, to be casted in a cold chamber die casting machine are of?