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For motors that require brushes, the brushes transfer power from the supply conductors to the ___ via the commutator.

The 120 V windings of a 120/240 V, 1φ motor are connected in ___ when connected to a 120 V supply.

Voltaic cells produce electrical energy via ___ reaction.

General requirements for communications systems are addressed in Article ___.

Trees shall not be used for ___.

The nominal phase to neutral voltage for a low-voltage wye system is ___ V.

A(n) ___ is permitted to be installed on a small appliance circuit.

What does the term Eustachian tube mean?

Five possible Three of the five are correct. Select two failed to select correct answers, and incorrectly select wrong answer. 

A 45-year-old woman presents with a history of progressive weakness, fatigue, weight loss, nausea, and increased skin pigmentation (especially of creases, pressure areas, and nipples). Her blood pressure is 120/78 mm Hg when supine and 105/52 mm Hg when standing. Laboratory findings reveal a serum sodium of 120 mEq/L (normal is 135 to 145 mEq/L), a potassium level of 5.9 mEq/L (normal is 3.5 to 5 mEq/L), and low plasma cortisol and high ACTH levels. What diagnosis would this woman’s clinical features and laboratory findings suggest? Would her diagnosis be classified as a primary or secondary endocrine disorder? What is the significance of her darkened skin? What type of treatment would be indicated?