(a) In a 3-phase, 4-wire system, the currents are in the A, B, and C lines under abnormal conditions of loading were as follows: IA = 100/30° A, 1b = 50/300° A, and Ic = 30/180° A

(i) Calculate the positive, negative, and zero-phase sequence currents in the A-line.

(ii) Calculate the return current in the neutral conductor.

(b) Check by sketching IA, IB, and Ic as the sum of the appropriate symmetrical components.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.