What are double-insulated tools?
What will be an ideal response?
Double-insulated tools are tools with motors whose electrical parts are either insulated or separated
from the user by special insulation inside the motor and by its insulating plastic motor housing.
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This symbol in a wiring diagram indicates _________
A) A female terminal B) A male terminal C) A fuse D) None of these
A relay is a device that ________
A) has a coil to actuate some contacts that control other circuits B) uses an electromagnet to open and close contacts C) isolates the actuating signal from the control signal D) all of these
How can tube-in-tube condensers become contaminated?
A) Cross-contamination can occur if the pressure increases. B) Cross-contamination can occur if the pressure drops. C) Cross-contamination can occur if the outside tube leaks. D) Cross-contamination can occur if the inside tube leaks.
PLC components are very sensitive to _____
A) static B) air pressure C) light D) humidity