Soldering machine question paper part2

 Multiple choice question (3-marks of each, total 60 marks)

Q1. Which of the following case soldering nozzle is block?

(a) Laser center is not correct

(b) Module lift up before soldering

(c) Ball center is not correct

(d) None of these

Q2. Which switch used to move socket at CCD position

(a) Positioning location

(b) Positioning CCD

(c) Move

(d) All of the above

Q3. How many levels ball need to fill in soldering?

(a) Half

(b) Full

(c) Semi half

(d) none of these

Q4. What metal is the solder ball made of

(a) iron

(b) tin

(c) Both A and B

(d) None of these

Q5. what should we do, if jig did not sense by left and right station?

(a) Check jig is placed flat

(b) Check proximity sensor of the center fixture is loose or offset

(c) Check jig and press emergency

(d) All of the above

Q6. What we have to do if computer screen shows us image timeout.

(a) Press emergency

(b) Restart the CCD positioning camera

(c) Press home switch

(d) Power off/ power on

Q7. What is the meaning of number 2 box at time of soldering process on HMI screen?

(a) Module is there

(b) Module pin not detected

(c) Soldering is done

(d) All of the above

Q8. The following picture parameter means

Fix picture here

(a) Module pin soldering done

(b) LSU has tin ball

(c) Ball is blocked

(d) None of these

Q9. Why we need to do laser center in soldering machine

(a) Melt ball perfectly

(b) Make align laser on top of ball

(c) Melt in less time

(d) All of the above

Q10. What is the use of proximity sensor that placed on socket (center fixture) of left and right station?

(a) Sense distance of jig

(b) Sense jig is placed flat

(c) Sense contact

(d) Sense height