# Archive | Tune Your Loop

## TUNE YOUR LOOP: Electrical Noise Effects on Instrumentation Control Equipment

1. Current does not flow in a ground loop. 2. One cause of interference through capacitive coupling is locating the signal leads too close to the interfering source. 3. Radio transmitters emit electromagnetic radiation. 4. Which of the following is a type of shielded cable? 5. You can usually reduce noise in signal cables by […]

## TUNE YOUR LOOP: Mathematics for Instrumentation Technicians

1. To compute capacitive reactance the following formula is used. Xc = 1/ 2Πfc. (“c” is expressed in farad and “f” is expressed in hertz.) What is the capacitive reactance if the frequency is 60 Hz and the capacitor size is 5 micro farad. 2. The temperature range of a transmitter is 100 -300°F. The […]

## TUNE YOUR LOOP: From the Certified Control Systems Technician Level I Review Course (TS00)

1. A (an)________ error must be correct for when a pressure transmitter is located lower than the bottom of the vessel being measured. 2. A process where material is fed and removed from the process at the same time is called a __________ process. 3. The controlled variable may also be the _________ variable. 4. […]

## TUNE YOUR LOOP: Electrical Noise Effects on Instrumentation Control Equipment

1. In an AC circuit, harmonics can cause the _____ to overheat. 2. _____ is an unwanted component of a signal or variable. 3. Noise is random variations of voltage, current, or data. 4. Which of the following is one of the causes of noise in instrumentation? 5. Shielding should always be grounded on both […]

## TUNE YOUR LOOP: Mathematics for Instrumentation Technicians

1. What is the temperature expressed in Celsius if the Fahrenheit temperature is – 40°? 2. If the input signal of a properly calibrated I/P is 7mA what is the standard output signal? 3. In a series circuit all resistance is added. What is the total resistance in the circuit if the current is 1 […]

## TUNE YOUR LOOP: Troubleshooting Instrumentation and Control Systems

Answer the following as True or False.   1. A disadvantage of HART is that the signal superimposed on the 4-20mA DC may distort the information from the process. 2. The first all digital protocol used to connect field devices with a field control system and interoperability is Foundation Fieldbus. 3. There is no 4-20mA […]

## TUNE YOUR LOOP: From the Certified Control Systems Technician® (CCST®) Level I Review Course (TS00)

1. The single most important document in the drawing package defining and organizing a project is the___________. 2. PLC programs use _______ logic to control the process. 3. A magnetic flow meter determines the flow of a process material by measuring the _____ of the fluid. 4. A _________ only controller will have an offset […]

## TUNE YOUR LOOP: Electrical Noise Effects on Instrumentation Control Equipment

1. The neutral conductor is not intentionally the system grounding conductor. 2. The law that describes the relationship between voltage, resistance, and current is called _____. 3. Resistance is what kills in an electrical shock. 4. Transient noise is permanent in a DC system. 5. Harmonics appear as a multiple of the fundamental sine wave. […]

## TUNE YOUR LOOP: Implementing Business to MES Integration Using the ANSI/ISA95 Standard

1. The bill of materials is part of the exchanged information model. 2. The bill of resources is not part of the exchanged information model. 3. There may be more than one production response for a production request. 4. There is at least one segment requirement in a production request.   What are your answers […]

## TUNE YOUR LOOP: Mathematics for Instrumentation Technicians

1. Your bank called that you have a shortage of \$10 in your account and you know that you have written another \$20 worth of checks that had not been withdrawn from your account, but just now you deposited \$50 in the bank. There is a charge of \$20 for the overdrawn checks what would […]