Q1. For what type of material does these threading techniques can be made possible:
(a) Ductile material (b) Brittle material (c) Harder material (d) Tougher material
Q2. These techniques of threading cannot improve the following properties:
(a) Thread's yield strength (b) Hardness (c) Resilience (d) Wear Resistance
Q3. The flow of material in thread rolling process takes place in which direction:
(a) Longitudinally (b) Laterally (c) Radially (d) Axially
Q4. Through which process thread rolling cannot be done:
(a) using flat dies (b) using punch and die (c) using two rolls with guide (d) using three rolls
Q5. In which type of thread rolling technique, the two dies reciprocates:
(a) in two rolls with guide system (b) in flat dies (c) in three rolls system (d) in planetary dies system
Q6. In which type of thread rolling operation, the billet rotates as well as revolves also:
(a) in two rolls with guide system (b) in flat dies system (c) in three rolls system (d) in planetary dies system
Q7. The following is not an advantage of thread rolling process over thread cutting process:
(a) quality of cold rolled products are good (b) chipless operations being cleaner (c) lesser material wastage (d) always cheaper in cost
Q8. When considering the blank diameter tolerance, a change in blank diameter will affect the major diameter by an approximate ratio of 5 to 1:
(a) True (b) False (c) Can't say
Q9. Production rates of thread rolling processes are usually three to five times faster than thread cutting:
Q10. A rolled thread can often be easily recognized because the thread has a smaller diameter than the blank rod from which it has been made: