1. Which of the following are used to support wires smaller than No. 8? c. door knob a. Split knobs b. solid knobs 2. What is the minimum distance between conductors in using knob and tube wiring method? a. 6 cm b. 16 cm c. 24 cm d. 30 cm 3. Which of the following are used to support or anchor wires as big as No. 8 or even bigger? a. Split knobs b. solid knobs c. door knob a. cotton tubing b. mylar tubing 5. What is the distance between the knobs in open wiring method? a. 6 cm b. 16 cm c. 24 cm 4. Where are the conductors inserted whenever it pass through studs, rafters, floor joists or any wooden part of a building or whenever wires cross each other? d. polyester tubing c. mica tubing 8. Which of the following are usually overhead or under raised a. cable tray b. PVC raceway d. drawer knobs 6. Which of the following is not an advantage of knob and tube wiring? a. It is used in temporary installation, such as construction jobs. b. It is used in permanent installation. c. It is economical when properly installed. d. It has a lower operating temperature because of ventilation brought by distances of the installation. 7. Which of the following is a rectangular sign mounting structure that also serves as an enclosure for both signage electrical components (such as transformers) and wiring? a. cable tray b. PVC raceway 19. What is the minimum size of rigid a. 15mm (20mm) 20. Which of the following is a general purpose conduit that acids, alkaline, and oils? a. LFNC b. LFNC A d. drawer knobs c. surface raceway floors but carry open wiring? c. surface raceway d. 30 cm d. wireways 9. Which of the following is a unit or assembly of units or sections and associated securely fasten or support cables and raceways? fittings forming a structural system used to d. wireways a. cable tray b. PVC raceway c. surface raceway 10. Which of the following is a slimmer aluminum enclosure and mounting structure? a. cable tray b. PVC raceway c. surface raceway d. wireways 11. Which of the following is a one piece, non-metallic, adhesive backed latching raceway designed to aesthetically organize and route low voltage communications cables? a. cable tray b. PVC raceway c. surface raceway d. wireways 12. Which of the following statement is not true? a. Raceways protect wires from heat, humidity, corrosion, water intrusion, and any other physical threats. b. Raceways are easy to cut and trim and are also not printable with a latex based paint. c. The National Electrical Code permits surface raceways in dry locations for exposed or surface work. d. The raceway can be used for concealed work on locations subject to severe to corrosive vapors, or in hoist ways and hazardous location. 13. Which of the following are electrical materials which are manufactured to be resistant to moisture and chemical atmosphere? a. offset bend c. round saddle bend d. trimming b. rigid non-metallic conduit 14. What is the process of removing rough edges or burrs at the cut ends of non-metallic conduit? a. offset bend c. round saddle bend b. rigid non-metallic conduit d. trimming 15. Which of the following is used when the conduit crosses an obstacle or when the conduit is entering an electrical box? a. offset bend c. round saddle bend b. rigid non-metallic conduit d. trimming mm (100mm) excellent protection 16. Which of the following is used when the conduit run across rectangular obstacles? a. offset bend c. round saddle bend b. rigid non-metallic conduit d. square saddle bend 17. Which of the following is used when the conduit run across circular objects like pipes? a. offset bend c. round saddle bend b. rigid non-metallic conduit d. square saddle bend 18. What is the maximum size of rigid non-metallic conduit that shall be used? a. 15mm (20mm) b. 32mm (10mm) c. 90mm (100mm) non-metallic conduit that shall be used? 32mm (40mm) C. LFNC B d. wireways d. 150mm (160mm) d. 150mm (160mm) to wing from abrasion, sunlight, mild d. LFNC C
