6. Martensite is a supersaturated solution of-
A. Alpha iron
B. Delta iron
C. Beta iron
D. Gamma iron
7. Atomic packing factor (APF) in the case of copper crystal-
A. 0.52
B. 0.68
C. 0.74
D. 1.633
Read More- Refrigeration and Air Conditioning Objective Questions
8. What is Teflon-
A. Laminated phenolic material
B. Thermoplastic fluorocarbon polymer
C. Thermosetting fluorocarbon polymer
D. The inorganic compound of fluorine and carbon
9. Monel metal is an alloy of-
A. Iron and Carbon
B. Copper and Zinc
C. Copper and Nickel
D. Aluminum and Copper
10. Which of the following material is used in the manufacture of extrusion nozzles-
A. White Cast Iron
B. Grey Cast Iron
C. Nodular Cast Iron
D. Malleable Cast Iron