25-Nav-B6 Ocean Engineering and Offshore Structures, December 2017: worked solutions

Paper format. PEO National Examinations, December 2017 — 98-Mar-B6, printed for Electrical & Electronics Engineering candidates. Three hours, closed book, one approved Casio or Sharp calculator. Eight questions of equal value; any five constitute a complete paper, and only the first five appearing in the answer book are marked. Constants supplied on the front page: $\pi = 3.14159$, $1\ \text{hp} = 746\ \text{W}$, $\mu_0 = 4\pi\times10^{-7}\ \text{H}\,\text{m}^{-1}$. All eight questions are solved here so the solutions cover whichever five a candidate chooses.

Subject note

This paper is listed under 25-Nav-B6 “Ocean Engineering and Offshore Structures”, but the printed paper is headed 98-Mar-B6 and every question is Electrical & Electronics Engineering content (BJT amplifier bias/load lines, XOR/NOR gated-logic synthesis, homopolar disc dc machine, transformer magnetic-circuit equivalent, op-amp Bode/frequency response, induction-motor slip and motor-load operating point, RC transient, parallel R-L-C phasor network) — zero naval-architecture or ocean-engineering content. Solved as the exam actually printed.

Reference texts

A. S. Sedra and K. C. Smith, Microelectronic Circuits, 8th ed. — BJT biasing and load lines (Ch. 5), op-amp frequency response (Ch. 2).
M. M. Mano and M. D. Ciletti, Digital Design, 6th ed. — Boolean algebra and DeMorgan’s theorems (Ch. 2), NOR/NAND universal-gate synthesis (Ch. 3).
S. J. Chapman, Electric Machinery Fundamentals, 5th ed. — dc machine emf and torque (Ch. 7–8), induction motors and slip (Ch. 6), transformers (Ch. 2).
C. K. Alexander and M. N. O. Sadiku, Fundamentals of Electric Circuits, 7th ed. — phasor analysis, ac power and power-factor correction (Ch. 9–11), first-order transients (Ch. 7).
W. H. Hayt and J. A. Buck, Engineering Electromagnetics, 9th ed. — magnetic circuits and induced emf.

25-Nav-B6 Ocean Engineering and Offshore Structures: December 2017