Review Questions

1.	Which type of label applicator would you use on a conveyor carrying high volumes of same-sized products? Automatic pneumatic piston label applicator Handheld label applicator Semiautomatic label applicator Automatic wipe-on label applicator
2.	Which power cord will you purchase if your RFID printer does not come with one? Two-prong power cord, ISO certified Three-prong power cord, certified by one of the international safety organizations and approved by the manufacturer Three-prong power cord, certified by a major electrical supply store Two-prong power cord, certified by one of the international safety organizations
3.	What is the name of the process in which you use the RFID printer/encoder to print and encode RFID labels that are placed only on products shipped to a certain customer? Print-and-apply Slap-and-ship Peel-and-present Print-and-slap
4.	The printer continuously issues "void" labels since the beginning of the roll. What can be the problem? (Select two options.) You accidentally threaded the printer with plain labels (without RFID inlays). The tag's antenna was damaged during label transportation. You used a roll from your new label converter for the first time The printer ran out of ribbon.
5.	Which type of printing will you use for labels that will be placed on pallets that will be stored in a warehouse in Texas? This warehouse does not have temperature control. Direct thermal. Thermal transfer. Laser print It does not matter; these methods are all equal.
6.	How would you prevent electrostatic discharge (ESD)? By using proper grounding and a humidifier. ESD is not a problem. By frequently touching the problematic device with a static brush. By using a secondary ground.
7.	What are the functions of the RFID printer/encoder? Tag encoding and verification and printing only human-readable information on a label Tag encoding and verification and printing any information on a label Tag encoding and verification, after the label is printed Printing information on a label, tag encoding, verification, and application on the product
8.	Where would you place a light sensor to trigger the interrogation? Under the conveyor belt and before the interrogation zone Above the conveyor belt and after the interrogation zone Slightly above the conveyor belt and before the interrogation zone, on the right and left sides of the belt Slightly above the conveyor belt and before the interrogation zone, on the right
9.	Which type of label applicator can place a label without touching the product or packaging? None. A label applicator always has to touch the product. Handheld label applicator. Pneumatic piston label applicator. Wipe-on label applicator.
10.	You are starting a pilot project for tagging products on one of your manufacturing lines, but you are not sure of the right place to tag your product. What do you use for your test before you make a decision? Automatic label applicator Handheld label applicator Manual application of labels Semiautomatic label applicator
11.	What principle do you use to calculate a tag's position in real-time location systems? Triangulation Pythagorean theorem Ampere's law Derivations
12.	What type of RFID technology are real-time location systems based on? Passive RFID systems Semi-passive RFID systems Active RFID systems Active and passive RFID systems
13.	What is the main advantage of RTLS (real-time location system) over GPS (global positioning system)? RTLS can be used inside or outside, GPS only inside. RTLS can be used only inside, GPS only outside. RTLS can be used inside or outside, GPS only outside RTLS uses a satellite.
14.	You need to install RFID printers/encoders in your warehouse for a slap-and-ship application, but you do not wish to run network cables. Your offices use a wireless network. Will you be able to communicate wirelessly with your RFID printers/encoders? (Select two options.) Yes, if the printer has integrated 802.11 wireless capability or through a print server. No. RFID printers/encoders can communicate only through RS-232 Yes, through an Ethernet print server. Yes, if the printer has integrated Bluetooth communication capability.
15.	How do you calibrate an RFID printer? By opening and closing the printhead By turning the printer off and back on again By pressing a Calibrate button or the equivalent or through a menu on the printer's display By pressing a Feed button or the equivalent
16.	How do you make sure that the boxes that are coming from your exception processing station have fully functioning tags? Tags are tested by the RFID printer; therefore, they will function. By placing an interrogation zone for verification after the box is retagged and before it leaves the exception-processing station. By placing an interrogation zone for verification before the box reaches the first intersection leading to the dock door. By testing tags before they are applied to the product.
17.	How do you configure a diverter to make sure that the boxes with nonreadable tags will be routed to exception processing? Connect a motion sensor with a diverter to make sure that the diverter does not miss any boxes. Set the diverter's default position to route all boxes to exception processing. When a valid tag is read, the diverter will open and route it to its destination. Set the diverter's default position to route all boxes to their destinations; when a valid tag is not read, the diverter will open and route it to exception processing. Connect the diverter to the interrogator through a PLC.
18.	What is the easiest way to find out the current settings of a printer? Print a configuration label. Look up the settings on the display on the printer's front panel. Find the settings in the manual. Figure out the settings according to printed labels.
19.	What type of feedback device would you use in a noisy warehouse? Buzzer Light stack Motion sensor B and C
20.	When in doubt, set the read and write power settings of the printer for the maximum. Is this statement true? Yes, maximum power will ensure reading and writing of the tag. Yes, maximum power will ensure that the tag is read or written correctly. No, it is important to follow the tag manufacturer's guidelines for reading and writing power, or the printer could read or write to a neighboring tag instead. No, it is important to follow the printer manufacturer's guidelines for reading and encoding power settings.

Answers

1.	D. The automatic wipe-on label applicator will be the most suitable for use on a conveyor with high volumes of same-sized products. This type of applicator does not require the product to stop in order to apply the label and handles high volumes, which handheld or semiautomatic applicators usually do not. A pneumatic piston label applicator is more suitable for production lines where the product can be briefly stopped, and accommodates different sizes of products.
2.	B. You should use a cord approved by the printer manufacturer. This cord will have a three-prong plug and will be certified by one of the international safety organizations.
3.	B. Slap-and-ship is a process in which the labels are printed, encoded, and placed on products that are shipped only to a mandating customer. In this case, RFID is not used for the benefit of the internal business process.
4.	A, C. If you accidentally use a roll of labels that does not include RFID inlays, the printer will keep looking for the inlay and will print "void" on each label if it does not find the inlay. Your new converter might not have followed the guidelines for inlay placement on the labels that are published by the printer manufacturer, and you may not have calibrated the printer for these new labels.
5.	B. Thermal transfer is preferred because the labels used for this type of printing are not heat sensitive and therefore do not fade or darken when subjected to heat.
6.	A. You should use proper grounding, possibly an air humidifier, and other ESD protection methods such as static mats for personnel.
7.	B. An RFID printer/encoder can print any information on a label, including bar codes, and provides tag encoding and verification before the label is printed.
8.	C. For the light sensor to work, it has to have a transmitter and receiver of the light beam. Therefore, both parts have to be mounted slightly above the conveyor belt, on opposite sides of the belt. The light sensor has to be mounted before the interrogation zone, because the product crosses the beam and the sensor sends a signal to the interrogator to start polling.
9.	C. Some pneumatic piston label applicators provide touchless application by blowing the label onto the product or packaging.
10.	D. For pilot projects and other low-volume testing projects, you should use a semiautomatic label applicator because it is a lot faster than handheld or manual tagging, but also cheaper and more flexible than a fully integrated automatic label applicator.
11.	A. Triangulation is used to calculate a tag's position in RTLS.
12.	C. Real-time location systems use active RFID technology, which is based on a tag that sends a signal to the environment. This signal is then received by the readers. According to the time the signal needed to travel from the tag to each reader, the tag's location can be calculated using triangulation.
13.	C. RTLS can be used inside of buildings as well as outside because it does not need a line of sight to a satellite as GPS does.
14.	A, D. RFID printer manufacturers usually provide a possibility of wireless communication through additional print servers enabling wireless 802.11 or Bluetooth communication. Some printers have these capabilities integrated.
15.	C. A printer usually can be calibrated by pressing a Calibrate button or the equivalent, depending on the manufacturer, which is usually located on the front panel. The calibration command usually can also be located through a menu on the display. In either case, refer to the printer manual.
16.	B. Tags can be damaged during application or might not function because of wrong placement on the product; therefore, you should test their function after they are applied to the box. The best way to test them is to place an interrogation zone with a light stack or buzzer that would verify the tag's function before the box leaves the exception-processing area.
17.	B. The diverter has to be set to route all boxes to exception processing unless the tag is read and proved valid. If the tag is read by the interrogator, the diverter opens and lets this box continue to its destination. If the tag is not read, the diverter does not get any command, because the interrogator does not register the existence of this box and therefore cannot send a signal to the diverter to route it to exception processing.
18.	A. The easiest way to find out current settings of an RFID printer is to print the configuration label, which carries information about printing settings, RFID settings, and network settings.
19.	B. In a noisy environment, a buzzer would not be heard; therefore, it is more suitable to use a light stack.
20.	C. It is important to follow guidelines for your RFID tag, including reading and writing power settings of your RFID printer/encoder. If the power was set too high, especially with small labels and inlays placed close to each other, you could read or write to neighboring tags by accident.