Answer the following statement(s) true (T) or false (F)
1. Inductance in an ac circuit causes a countervoltage.
2. A capacitor is charged when an ac voltage is applied to its terminals.
3. The principle of the conservation of energy cannot be applied to steady-state ac circuit theory.
4. In ac power systems, an adequate supply of both watts and magnetizing VARs must be available.
5. Inductive load equipment such as fluorescent light ballasts, power distribution lines, and induction motors all require capacitors to ensure the supply of magnetizing VARs.
1. True
2. False
3. False
4. True
5. True
You might also like to view...
When using a saw to cut cellular glass, the _____.
a. saw should be a coarse tooth design b. insulation must not have a jacket applied c. saw’s teeth tend to wear down quickly d. kerf should be minimized for a tight fit
An optional method for determining feeder to schools is covered in _____.
a. NEC® Section 220.102 b. NEC® Section 220.86 c. NEC® Table 220.88 d. NEC® Article 555
Fertilization of cool season turfgrasses should never be done in the late fall because it will damage plants when the first frost arrives
Indicate whether the statement is true or false
?What is the most common preheating temperature range for most steels?
A. ?250°F to 400°F (120°C to 200°C) B. ?50°F to 100°F (10°C to 37°C) C. ?350°F to 650°F (170°C to 340°C) D. ?65°F to 145°F (18°C to 62°C)