1) _______ grounds are located on the Printed Circuit Board.

2) _______ grounds are the most exposed part of a grounding system.

3) The three main parts of an Earth grounding system are the ________   ________, the _________   __________, and the ________ _________.

grounding electrode          grounding   conductors       

bonding  location

4) The Earth is an _______ circuit to noise currents, and therefore has no means to 'sink' , or absorb system noise.

5) A ground loop is a _______ _______ within the grounding system.

6) A ground noise current is ___________ current flow on a ground conductor.

7) The currents flowing on an ___________ signal shield are both intentional and unintentional.

8) Improper wiring may be a source of ground current when there is a ___ ___ reversal, or an improper ___ ___ bond in addition to the bonding location.

9) __________ capacitance is an unintentional source of ground current.

10) Loose THIN wires installed in electrical conduit are a source of __________ coupled ground current.

11) The ______ is neither a source nor a destination for system noise.

12) __________ ___________ _________ is the mechanism by which ground currents cause noise in unbalanced signals.

13) Unintentional ground current flowing through the circuit ground of a circuit board is known as a Pin ___ Problem.

14) A _______ may be used to expose a Pin ____ Problem by passing a 60 Hz noise current across a signal ground and the chassis ground.

hummer ,1

15) Balanced Signals depend on matched __________ of the high and low signal interfaces with respect to ground.

16 An amplitude that is different across both signal conductors is in ___________ mode, or 'normal' mode.

17) An amplitude that is the same across both signal conductors is _________ mode.

18) C_______ M ________ R_________  is the apparent cancelling of identical voltages by a differential input.

19) Cable shielding effectively blocks ______ fields, but is ineffective at blocking magnetic fields.

20) ________ plugs, or audio signal terminators may be used to diagnose system noise causes based on observable symptoms.

21) Unacceptable ground loop hum may be prevented by changing the  ______ of ground current, the _______ of the ground loop conductors, or the ________ 

______ of the ground loop.

source 

resistance

closed

path

22) Star Grounding schemes are built around a single ground connection referred to as a ________ ________.

23) Telescoping Grounding schemes solve ground loops with strategically located _______ resistance.

24) Ground lift cables and switches may not be used for _________ signals because the ground is a return path for current.

25) Grounds associated with ________ cables may be lifted, but you must never tamper with a device Earth (power) ground.

26) An isolated ground receptacle uses an ________ supply grounding conductor to separate it from other grounding devices and materials.

insulated