Question 1

Which of the following is core hardening process?

Accepted Answer

A) CO2 process 
B) Cold set process 
C) Furan system 
D) All of the above

Question 2

Electric indirect are furnace is normally used for melting of

Accepted Answer

A) alloy steels 
B) cast steels 
C) non-ferrous metals 
D) all of the above

Question 3

Head storage capacity of moulding sand can be increased by adding?

Accepted Answer

A) graphite 
B) chromite 
C) magnesium powder 
D) any of the above

Question 4

Investment casting can be used for which of the following alloys

Accepted Answer

A) cobalt based satellite 
B) Tool steels 
C) Hynes super alloys 
D) All of the above

Question 5

Blow holes in castings are due to

Accepted Answer

A) high moisture content of the sand 
B) low permeability of sand 
C) excessive fine grains and gas producing ingredients 
D) any of the above

Exam 9: Foundry Processes and Techniques

Which of the following is core hardening process?