Test
Electronics EASA - PCB
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (10)
1When compared to a system that is constructed on one board, a modular system using Printed Circuit Boards (PCBs) is.
- Aharder to fault find.
- Bmore expensive for spares.
- Ceasier to fault find.
2A Printed Circuit Board (PCS) is constructed of a plastic laminate which has bonded to one or both sides.
- Aa thin sheet of copper.
- Bvarious thicknesses of copper.
- Ca thick sheet of copper.
3How is a PCB protected after manufacture?.
- ABy conformal coating.
- BWith non-conductive varnish.
- CWith wax.
4A multi-layer PCB has.
- Atwo or more layers on one or both sides.
- Bone layer on either side.
- Ctwo or more layers connected in series.
5When removing a microprocessor.
- Aensure the power is OFF to avoid static discharge.
- Bno damage is done by static discharge.
- Cconsiderable damage can be done by static discharge.
6On a PCB, a decoupling capacitor is used to get rid of transient currents between which points?.
- AThe electronic circuit and the aircraft ground.
- BThe negative rail and the rest of the circuit.
- CInterspaced along the circuit.
7A decoupling capacitor in a PCB is used to.
- Aminimise transient currents
- Bpass DC only.
- Cpass AC only.
8What is the base material of a PCB?.
- AInsulator.
- BSemiconductor.
- CConductor
9In a printed circuit board , the surface resistance testing is.
- Ainsulation resistance between adjacent printed conductor.
- Bthe resistance between the tow inductors.
- Cbetween the board and the conductor
10What are printed circuit boards made of?.
- AFibreglass board coated with copper in which circuits are etched.
- BSynthetic resin board etched with copper.
- CMatrix board with components soldered on.
Información
- Descripción
- Test sobre Electronics EASA - PCB, creado por Ahidul Hoque el 27/02/2016.
- Autor
- Ahidul Hoque
- Idioma
- English
- Visitas
- 2
- Valoración
- Aún sin valoraciones Valora este test