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Module4.2Printed Circuit Board(1of3)
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On a PCB, a decoupling capacitor is used to get rid of transient currents between which points?.
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1 point
The electronic circuit and the aircraft ground.
The negative rail and the rest of the circuit.
Interspaced along the circuit.
How is a PCB protected after manufacture?.
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1 point
By conformal coating.
With non-conductive varnish.
With wax.
When compared to a system that is constructed on one board, a modular system using Printed Circuit Boards (PCBs) is.
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1 point
harder to fault find.
more expensive for spares.
easier to fault find.
A Printed Circuit Board (PCS) is constructed of a plastic laminate which has bonded to one or both sides.
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1 point
a thin sheet of copper.
various thicknesses of copper.
a thick sheet of copper.
When removing a microprocessor.
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1 point
ensure the power is OFF to avoid static discharge.
no damage is done by static discharge.
considerable damage can be done by static discharge.
In a printed circuit board , the surface resistance testing is.
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1 point
insulation resistance between adjacent printed conductor.
the resistance between the tow inductors.
between the board and the conductor.
decoupling capacitor in a PCB is used to.
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1 point
minimise transient currents.
pass DC only.
pass AC only.
What is the base material of a PCB?.
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1 point
Insulator.
Semiconductor.
Conductor.
A multi-layer PCB has.
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1 point
two or more layers on one or both sides.
one layer on either side.
two or more layers connected in series.
What are printed circuit boards made of?.
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1 point
Fibreglass board coated with copper in which circuits are etched.
Synthetic resin board etched with copper.
Matrix board with components soldered on.
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