ETC Electrical Systems & Instrumentation Flashcards
6 cards from real ETC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 ETC Electrical Systems & Instrumentation flashcards as text
What is the National Electrical Code (NEC) primarily used for?
Answer: Setting safety standards for electrical installations in the US
The NEC (NFPA 70) establishes minimum safety requirements for electrical installations to protect people and property.
In process control, what does PLC stand for?
Answer: Programmable Logic Controller
A Programmable Logic Controller is an industrial digital computer used to automate electromechanical processes.
Which type of wire insulation is rated for wet locations and direct burial?
Answer: USE-2
USE-2 wire is rated for wet locations, direct burial, and service entrance applications.
What does calibration of an instrument ensure?
Answer: That readings are traceable to a known standard and within acceptable accuracy
Calibration verifies and adjusts an instrument's output against a traceable reference standard to ensure measurement accuracy.
What is the purpose of a control relay in an industrial circuit?
Answer: To use a low-power signal to switch a higher-power circuit
A control relay uses an electromagnetically operated switch to allow a low-current control circuit to operate a high-current load circuit.
Which test verifies the continuity of a grounding electrode conductor?
Answer: Earth continuity test
An earth continuity test measures the resistance of the grounding electrode conductor to confirm a low-impedance path to earth.