ISA CCST Level 1 Study Guide: Domain 1 | 56 Questions And Answers Already Graded A+

Good manufacturing practice recommends that a test instrument be _______ times more accurate than the unit under test. A.2 B.4 C.6 D.8 - B. 4 When troubleshooting a 4-20 mA transmitter, you discover the transmitter is powering off at 100% output. What is the most likley cause? A. Too much resistance in the loop B. Too little resistance in the loop C. Excessive current in the loop D. Excessive voltage in the loop - A. Too much resistance in the loop The statement; "Thermocouple extension wires must have the same thermo-electric properties as the thermocouple that they are used with," is: A. True if the extension wires are submerged in the process fluid. B. True in most installations C.False. Extension wires must be made from either copper or brass. D. False. The type of extension wier makes no difference - B. True in most installations If a current of 9mA is flowing through a 250 ohm resistor, what would be the voltage drop across the resistor? A. 12.5 volts B. 22.5 volts C. .225 volts D. 2.25 volts - D. 2.25 voltsWhat is the preferred orientation to use when installing a magnetic flowmeter? A. Vertical, downward flow B.Horizontal, upward flow C. Vertical, upward flow D. Horizontal, downward flow - C. Vertical, upward flow