The total resistance of a series circuit with resistances of 18 and 9 is:

The total resistance of a series circuit with resistances of 18 and 9 is:
 
  A) 18  9 = 162 B) 18  9 = 9
  C) (18  9 )/(18 + 9 ) = 6 D) 18 + 9 = 27

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[Ques. 2] What is the current draw of a 1,200-W electric heater operating on a 120-V AC power supply?
 
  A) 120 V + 1,200 W = 1,320 A B) 1,200 W/120 V = 10 A
  C) 1,200 W  120 V = 144,000 A D) 120 V/1,200 W = 0.1 A

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[Ques. 3] What is the current draw of a 120-V circuit with a resistance of 20?
 
  A) 120 V + 20 = 140 A B) 120 V  20 = 2,400 A
  C) 120 V/20 = 6 A D) 20/120 V = 0.17 A

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[Ques. 4] The maximum safe pressure to impose on any low-pressure system is:
 
  A) 15 psig. B) 10 psig. C) 5 psig. D) 20 psig.

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[Ques. 5] Battery-powered devices operate on:
 
  A) Direct current (DC). B) Modulating current (MC).
  C) Natural current (NC). D) Alternating current (AC).