Super – Tension (S.T) cables are used for _________________ voltages. Choose correct answer: a) 22 kV to 33 kV B) 22 kV to 66 kV c) 33 kV to 66 kV d) 11 kV to 22 kV

17. A widely accepted practice is to identify 3-phase ungrounded (hot) conductors as ____ in 208/120 volt, 4-wire, wye-connected systems. Select one: A. RED, YELLOW, AND GREEN B. BLACK, RED, AND BLUE C. BLACK, RED, AND WHITE D. YELLOW, GREEN, AND BLUE

A 112.5 kva, 480v primary to 120/240v secondary, three-phase transformer with a 300 amp secondary overcurrent device will require at least _______ size secondary conductors   a. 750 kcmil   b. 300 kcmil   c. 500 kcmil   d. 350 kcmil

Connectors marked ____ are suitable for use with aluminum, copper, or copper-clad conductors?    1. CO-ALR only   2. AL/CU only   3. UL 9   4. CO-ALR and AL/CU   What is the correct answer? Why?

28. A multiwire circuit must consist of conductors connected to ____. Select one: A. THE SAME PHASES B. DIFFERENT BRANCHES C. THE SAME BRANCH D. DIFFERENT PHASES

3.a. There may be installations where grounded conductors of different systems are installed within the sameraceway, cable, or box. In these cases, it's imperative that the system-grounded conductors remainA. spliced.B. disconnected.C. separated.D. buried.3.b. In dwelling units, the maximum allowable voltage between conductors that supply lighting fixtures isA. 220 V.B. 120 V.C. 115 V.D. 110 V.

Q2 (1). In Figure 2-1, two curves represent fault currents supplied by two sources in case of phase faults at different corresponding locations. Overcurrent protection 1 and 2 are designed to protect line A- B. If there is no directional element, please explain how the setting values for overcurrent protection 1 and 2 could be calculated? (2). If only one directional element is available, please explain how the setting values for overcurrent protection 1 and 2 could be calculated? A B K1 IK1 g K2 Figure 2-1 IK2

6.a. The amount of short-circuit current that flows depends upon the amperes available at the source ofpower, the length of the circuit, and what other primary factor?A. The presence of a ground fault currentB. Proper installation of the branch circuitC. Presence of no previous damage to the electrical systemD. The size of the conductors and voltage at which they operate6.b. You're evaluating the components of a multioccupancy building that won't have an on-site employee. Tobe compliant with the NEC, each occupant will need to have access to their ownA. service-disconnecting means.B. service conductor.C. cable attachment point.D. emergency fire water-pump disconnect.