1000+ Foundry Technology Objective Type Questions and Answers - 3

Question: 11

In case of carbon dioxide moulding, the binder is used is generally

(A) graphite

(B) coal dust

(C) china clay

(D) sodium silicate

Question: 12

Which of the following is used to increase refractoriness of sand?

(A) Graphite

(B) Iron free zirconium

(C) Silica flour

(D) All of the above

Question: 13

In case of copper, the pouring temperature is around

(A) 1060°C

(B) 1160°C

(C) 1260°C

(D) 1450°C

Question: 14

In case of cast steel, the contraction allowance will be least for castings having dimensions

(A) upto 600 mm

(B) 600 to 1000 mm

(C) 1000 mm to 1800 mm

(D) above 1800 mm

Question: 15

In case of plaster moulding, the mould is prepared in

(A) lime + cement

(B) slacked lime

(C) gypsum plaster

(D) any of the above