# ISA Interchange

Welcome to the official blog of the International Society of Automation (ISA).

# TUNE YOUR LOOP: Mathematics for Instrumentation Technicians

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TUNE YOUR LOOP: Questions to keep you sharp.

1. What is the temperature expressed in Celsius if the Fahrenheit temperature is -
40°?

1. -46.4°
2. - 40°
3. - 9.8°
4. + 40°[/ordered_list]

2. If the input signal of a properly calibrated I/P is 7mA what is the standard output
signal?

1. 5.25PSI
2. 2.25PSI
3. 4.20PSI
4. 6.56 PSI[/ordered_list]

3. In a series circuit all resistance is added. What is the total resistance in the
circuit if the current is 1 mAmp and voltage is 10VDC? (E=IR)

1. 10Ω
2. 100Ω
3. 10KΩ
4. .10KΩ[/ordered_list]

4. Using the vector formula there are two forces at 90 degrees to each other being
applied to an object. One force is represented by a line 20 inches long while the
other forces is represented by a line 10 inches long, what is the length, in inches,
of the line representing the resultant force?

1. 30.00
2. 14.14
3. 22.36
4. 7.07[/ordered_list]

1. b

2. a

3. c

4. c

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