TUNE YOUR LOOP: Mathematics for Instrumentation Technicians

TUNE YOUR LOOP: Questions to keep you sharp.

Tune Your Loop is a series of posts consisting of questions from ISA Training Courses.

1. When the AC voltage is at 45 degrees of it travel what is the voltage at that
instant.(sine value@45 degrees =.707) The maximum voltage of the circuit is
169VAC. (Formula is maximum voltage (E max) times sine of 45 degrees = point
voltage.)

  1. 120
  2. 239
  3. 60
  4. 185

2. On three phase power each phase is separated from the other phases by __degrees.

  1. 3
  2. 120
  3. 277
  4. 60

3. Convert the binary number 10101 to a decimal number.

  1. 15
  2. 25
  3. 3
  4. 21

4. A plant has a 30 ft high water tank mounted on top of a 70 ft platform. What is
the water level in the tank, measured in feet, if a pressure gage on the first floor,
height 5 ft. reads 40 PSI?

  1. 22.3
  2. 27.3
  3. 30
  4. 10

 

What are your answers before you read ahead?

1. a

2. b

3. d

4. b

 

From the ISA Course Mathematics for Instrumentation Technicians (FG02) pre-instructional survey.

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