This set of CIM Multiple Choice Questions & Answers (MCQs) focuses on “Robot Applications”.
1. In which of the following tasks a robot transfers parts from one place to another?
a) Spray coating
b) Arc welding
c) Material handling
d) Grinding
View Answer
Explanation: In material handling, the function of a robot is to transfer objects from one place to another. The robot consists of a gripper to handle the parts. Material transfer and machine loading/unloading come under the category of material handling.
2. _________ operation comes under the category of material transfer.
a) Insertion
b) Spray coating
c) Press working
d) Grinding
View Answer
Explanation: Palletizing, depalletizing, insertion, and stacking operations are examples of material transfer. Pick & place is the simplest material transfer operation. A limited sequence robot can be used for simple pick and place operation.
3. In which of the following operations, the vertical location of the drop-off position changes with each cycle?
a) Stacking
b) Machine unloading
c) Machine loading
d) Depalletizing
View Answer
Explanation: In stacking operation, the robot places flat objects on top of each other. The horizontal position remains the same, but the vertical position changes with every part. In depalletizing, the robot removes parts placed in an ordered arrangement in a pallet and drop them at other location.
4. In _________, the robot picks up parts from one location and deposit them onto a pallet.
a) Insertion
b) Palletizing
c) Machine loading
d) Stacking
View Answer
Explanation: In palletizing, the location of depositing the part on the pallet is different for every cycle, but the pick-up location remains the same. In machine loading, the robot transfers material to a production machine.
5. Machine loading is also known as insertion.
a) True
b) False
View Answer
Explanation: When a robot inserts objects into the compartments of a divided cartoon, it is called insertion. Machine loading involves feeding raw material to a production machine. In machine unloading, the robot unloads finished parts from the machine.
6. ________ operation requires playback robot with point to point control.
a) Spray coating
b) Arc welding
c) Spot welding
d) Water jet cutting
View Answer
Explanation: In spot welding, two electrodes pinch metal parts, and high current is applied across the contact point for fusion. Spray coating, arc welding, and water jet cutting require continuous path control.
7. Which of the following is a mechanical fastening technique?
a) Riveting
b) Welding
c) Brazing
d) Soldering
View Answer
Explanation: Screws, bolts & nuts, rivets, and clamps are used for mechanical fastening. Welding, brazing, soldering, and adhesive bonding comes under the category of joining processes. Assembly is done using mechanical fastening or joining.
8. Which of the following relations is correct? (Here, Tc is cycle time, To is the actual processing/assembly time, Th is work part handling time, and Tt is average tool handling time.)
a) To = Th+Tc-Tt
b) Tt = Th-Tc-Tt
c) To = Tc+Th+Tt
d) Tc = To+Th+Tt
View Answer
Explanation: The average production time involves set-up time and cycle time both. If Tp is the average production time, Tsu is the set-up time, and Q is the number of work units produced in the production run then, Tp = (Tsu+Q*Tc)/Q.
9. In a plant, a robot joins two parts by welding. The welding operation takes 2 min. It takes 6 minutes to change the welding torch, and it is changed after every 30 cycles. At the end of each cycle, the robot drops the welded component into a box and picks other parts from the second box. This handling activity takes 30 seconds. What is the cycle time per piece?
a) 2.90
b) 2.70
c) 2.50
d) 2.20
View Answer
Explanation: Actual processing time per cycle, To = 2 min
Average tool handling time (for changing welding torch per cycle), Tt = 6/30 = 0.20 min
Work piece handling time, Th = 30 sec = 30/60 min = 0.5 min
Cycle time, Tc = To+Th+Tt
= 2+0.5+ 0.2
= 2.7 min per piece.
10. Production rate is the reciprocal of _______
a) Actual processing time
b) Average production time
c) Production cost per piece
d) Fixed cost
View Answer
Explanation: The production rate is defined as work units produced per hour. If Tp is the average production time in min per work unit, then production rate, Rp = 60/Tp. When the quantity of work units produced in the production run becomes very large, Rp approaches the cycle rate Rc, which is the reciprocal of cycle time Tc.
Sanfoundry Global Education & Learning Series – CIM.
To practice all areas of CIM, here is complete set of Multiple Choice Questions and Answers.
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