Q.1.
In an iron thermit, how many moles of aluminium reacts with three moles of iron oxide to give nine moles of iron?
- a) 6
- b) 7
- c) 8
- d) 9
Q.2.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Sand plug
- b) Crucible
- c) Wax pattern
- d) Slag basin
Q.3.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Sand plug
- b) Crucible
- c) Wax pattern
- d) Slag basin
Q.4.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Riser
- b) Workpiece
- c) Runner
- d) Wax pattern
Q.5.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Riser
- b) Workpiece
- c) Runner
- d) Wax pattern
Q.6.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Riser
- b) Workpiece
- c) Runner
- d) Wax pattern
Q.7.
In the given figure of thermit welding apparatus, what does the question mark represents which part?
- a) Riser
- b) Runner
- c) Sand plug
- d) Preheating
Q.8.
After the achievement of welding temperature, electrical connections are established to complete the weld.
- a) True
- b) False
Q.9.
What is the magnitude of temperature produced in a thermit reaction?
- a) 2500°C
- b) 3000°C
- c) 3500°C
- d) 4000°C
Q.10.
Thermit welding is used for making rail tracks.
- a) True
- b) False