conducting transformer load

Question 1

A load test taken with a clip-on ammeter and a multimeter will indicate if a transformer is overloaded at the time of the test.

Answer 1

true

Question 2

Overload peaks of ? do not affect a transformer.

Answer 2

5 minutes

Question 3

When a maximeter is clamped around an energized conductor, never ?

Answer 3

change taps on the meter

Question 4

Maximeters record the ? during the time of the test.

Answer 4

highest load

Question 5

The red indicator needle on a maximeter indicates the load at the time of the reading.

Answer 5

true

Question 6

The tap setting on the side of the maximeter should be set to ? if placed on a 25-kVA single-phase transformer.

Answer 6

40/1

Question 7

A single-phase transformer should have a maximeter placed on each secondary lead from the transformer.

Answer 7

true

Question 8

Total phase current times line to neutral voltage equals kilovolt-ampere.

Answer 8

false

Question 9

A 15-kVA single-phase distribution transformer shows 75 amperes on X1 and 60 amperes on X3. Voltage is 120 volts from each secondary bushing to the neutral. The transformer has exactly ? of load.

Answer 9

16.2 kva

Question 10

A balanced load on a transformer is when ?

Answer 10

both phase to neutral leads have the same load.

Question 11

Since a single-phase distribution transformer has two secondary coils, it is possible for only one coil to be overloaded.

Answer 11

true

Question 12

A 15-kilovolt-ampere transformer is checked and is carrying 19.5 kilovolt-amperes; it should be reported as overloaded.

Answer 12

true