WESTINGHOUSE SILENT SENTINEL CH.2

Question 1

THE GROUND AND THE NEUTRAL ON A THREE PHASE SYSTEM ARE BY DEFINITION THE SAME POINT

Answer 1

FALSE

Question 2

IN A POTENTIAL TRANSFORMER THE VOLTAGE DROP FROM THE POLARITY TO THE NON POLARITY MARKED TERMINALS ON THE PRIMARY SIDE IS SUBSTANTIALLY IN PHASE WITH THE VOLTAGE DROP FROM THE POLARITY TO THE NON-POLARITY MARKED TERMINALS ON THE SECONDARY SIDE.

Answer 2

TRUE

Question 3

THE CURRENT FLOWING OUT AT THE POLARITY MARKED TERMINAL ON THE SECONDARY SIDE OF A CURRENT TRANSFORMER IS SUBSTANTIALLY IN PHASE WITH THE CURRENT FLOWING IN AT THE POLARITY MARKED SIDE OR TERMINAL ON THE PRIMARY

Answer 3

TRUE

Question 4

OPEN CIRCUITS ON POWER SYSTEMS OCCUR MORE FREQUENTLY THAN SHORT CIRCUIT FAULTS

Answer 4

FALSE

Question 5

A HIGH CURRENT ARE (IN EXCESS OF 100 AMPERES) IN AIR HAS A NEARLY CONSTANT VOLTAGE DROP OF AROUND _______ VOLTS PER FOOT.

Answer 5

400

Question 6

THE CIRCUIT DIAGRAM USUALLY GIVES THE FOLLOWING THREE ITEMS OF INFO ABOUT CURRENTS AND VOLTAGES. ELIMINATE ONE

Answer 6

MAGNITUDE

Question 7

THE TERM SYMMETRICAL COMPONENTS REFERS TO A MATHEMATICAL METHOD OF REDUCING ANY UNBALANCED THREE PHASE SET OF VECTORS INTO THREE ______________ SYSTEMS.

Answer 7

BALANCED