1. Knock-out Plugs and Lampholders
Electric Hardware Identification
Interactive Quiz
Knock-out Plugs and Lampholders

2. Can you identify the following hardware?
To answer the question, click on the photograph you think is the correct answer. A correct answer will generate APPLAUSE. An incorrect answer will generate another sound. To see the common names of the Hardware, click anywhere on the background. Then use the “page down” key, “down arrow” key, or another mouse click in the background area to move to the next question.
Slide 2 of 15

3. Which of the following is the steel knock-out plug?
Thermoplastic knock-out plug
Cast weatherproof box closure plug
Slide 3 of 15

4. Which of the following is the liquidtight knock-out plug?
Solderless wire connector (wire nut)
Thermoplastic knock-out plug
Slide 4 of 15

5. Which of the following is the thermoplastic knock-out plug?
Cast weatherproof box closure plug
Armored cable (BX cable) bushing
Slide 5 of 15

6. Which of the following is the 4-inch porcelain keyless lampholder?
Nonmetallic lampholder for handy box
4-inch plastic pull-chain lampholder
Slide 6 of 15

7. 4-inch porcelain pull-chain lampholder with grounded receptacle
Which of the following is the 4-inch porcelain pull-chain lampholder with grounding receptacle?
4-inch porcelain pull-chain lampholder with grounded receptacle
Nonmetallic, globed watertight lampholder
4-inch plastic keyless lampholder
Slide 7 of 15

8. Which of the following is the nonmetallic lampholder for a handy box?
4-inch plastic pull chain lampholder
Nonmetallic, globed watertight lampholder
Nonmetallic lampholder for handy box
Slide 8 of 15

9. Nonmetallic lampholder for handy box
Which of the following is the nonmetallic globed weatherproof lampholder for a round box?
Nonmetallic lampholder for handy box
Nonmetallic, globed watertight lampholder
Nonmetallic, globed weatherproof lampholder for round box
Slide 9 of 15

10. Nonmetallic, globed watertight lampholder
Which of the following is the nonmetallic globed watertight lampholder?
Nonmetallic, globed watertight lampholder
Metallic weatherproof lampholder for round box
Time delay plug fuse
Slide 10 of 15

11. Which of the following is the 4-inch plastic keyless lampholder?
4-inch plastic pull-chain lampholder
4-inch porcelain pull chain lampholder with grounded receptacle
4-inch plastic keyless lampholder
Slide 11 of 15

12. Which of the following is the 4-inch plastic pull-chain lampholder?
4-inch porcelain keyless lampholder
Weatherproof lampholder for device box
Slide 12 of 15

13. Nonmetallic, globed watertight lampholder
Which of the following is the metal weatherproof lampholder for a round box?
Nonmetallic, globed watertight lampholder
Metallic weatherproof lampholder for round box
Nonmetallic lampholder for handy box
Slide 13 of 15

14. 4-inch plastic pull-chain lampholder
Which of the following is the metal weatherproof lampholder for a device box?
4-inch plastic pull-chain lampholder
Nonmetallic, globed weatherproof lampholder for round box
Weatherproof lampholder for device box
Slide 14 of 15

15. The End
This material was prepared by Dave Wilson, Information Technology and Communication Services, and reviewed by Dr. Joe Harper, Department of Agricultural Engineering, College of Agricultural, Consumer and Environmental Sciences, University of Illinois at Urbana-Champaign. Photographs by Cindy Lamb Basham and the author. The illustrated hardware may appear on the identification list of the Illinois Association of Vocational Agriculture Teachers Ag Mechanics Career Development Event.
ITCS Instructional Materials
1401 South Maryland Drive
Urbana, IL
(217)
FAX (217)
Copyright © by the Board of Trustees of the University of Illinois.
Quit
Click Quit to exit this program
ITCS Instructional Materials College of Agricultural, Consumer and Environmental Sciences University of Illinois at Urbana-Champaign
Slide 15 of 15