Journeyman lineman
Journeyman lineman What fahrenheit tempature would a transformer have to be 55% centigrade above ambrient of 98* F? - 55x1.8=99 + 32 = 131*F 131 + 98= 229* A conductor is pulled to what tension? - 50% To dead end three 2/0 HD conductors which have a breaking strength of 5,927 lbs each A. How many B. What size C. What lead should the down guys have? - A. 2 B. 3/8" steel C. 1-1 leads Pole steps should be spaced what distance apart? - 18" At what angle does a lifting sling have the same weight stress as the load being lifted? - 30* At what angle is the weight stress reduced approximately 1/2 of the load being lifted? - 60* How do you tell how much pull will be needed to lift a known weight with a double to double block and tackle? - Divide the weight by the number of running lines over moveable sheaves. 1000/4=250 or 25% per line. Can transformers of different polarity be parallel? How do you test polarity? - Yes H1. H2 / VM
Información del documento
- Subido en
- 1 de octubre de 2023
- Número de páginas
- 3
- Escrito en
- 2023/2024
- Tipo
- Examen
- Contiene
- Preguntas y respuestas
