# 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

1. a

2. b

3. d

4. b

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

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