JOURNEYSMAN EXAM GENERAL KNOWLEDGE
1. Definition of a continuous load: - Answer: A load where the maximum current is expected to continue for at least 3 hours.
2. Current drawn by a 3-hp, 240-volt, 3-phase motor (90% efficiency, 95% power factor): - Answer: 6.3 amperes.
3. Kilowatts used by a...
- Answer: A load where the maximum current is expected to continue for at least 3 hours.
2. Current drawn by a 3-hp, 240-volt, 3-phase motor (90% efficiency, 95% power factor):
- Answer: 6.3 amperes.
3. Kilowatts used by a three-phase, 480-volt AC motor drawing 52 amperes with an 88% power factor:
- Answer: Approximately 38 kW.
4. Resistor value for colored bands: orange, red, brown, silver:
- Answer: 320 Ohms (10% tolerance).
5. Resistance associated with a 1,500-watt appliance connected to 120 volts:
- Answer: 9.6 Ohms.
6. Horsepower to watts conversion:
- Answer: One horsepower is equal to 746 watts.
7. Type of surge protection device for installation between service transformer and service disconnect:
- Answer: Type 1.
8. Definition of askarel:
- Answer: A group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating
media.
9. Workspace requirement for equipment that is 60 inches in height:
- Answer: The workspace shall extend 78 inches from the grade, floor, or platform.
, 10. Recess distance for metallic plugs or plates in nonmetallic enclosures:
- Answer: 1/4 inch.
11. Minimum space required above unshielded switchboard or switchgear to any combustible ceiling:
- Answer: 36 inches.
12. Recommended maximum total voltage drop on feeders and branch circuits:
- Answer: 5%.
13. Identification color for the negative ungrounded conductor in a DC system:
- Answer: Black.
14. Type of conduit not permitted for underground service conductors:
- Answer: FMC (Flexible Metal Conduit).
15. Maximum duration for temporary electric power and lighting installations for holiday decorative
lighting:
- Answer: 90 days.
16. Maximum voltage drop for branch circuits serving sensitive electronic equipment operating at 120
volts line-to-line:
- Answer: 1.5%.
17. Identification color for the positive ungrounded conductor in a DC system:
- Answer: Red.
18. Feeder conductor size requirement when supplying continuous and noncontinuous loads:
- Answer: Minimum ampacity shall be not less than the noncontinuous load plus 125% of the
continuous load.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller bestscores1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.58. You're not tied to anything after your purchase.
