TRANSFORMERS LEVEL II FINAL PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ A buck-boost transformer is typically used to change voltage by
between ? and ? Answer: 5% / 25%
◉ When a buck-boost transformer has current less than nine amperes, an
overcurrent protection device is allowed to be rated at not more than ? of
the input current. Answer: 167%
◉ When a buck-boost transformer has current of nine amperes or more,
an overcurrent protection device is allowed to be rated at ? of the full-
load current. Answer: 125%
◉ A(n) ? can consist of current transformers wired to sense when an
unbalance of 50% or more is present in the line current. Answer: fault-
sensing system
◉ Which of the following are common methods of sizing a buck-boost
transformer? Answer: I. Determine the load current and the buck or
boost voltage and calculate the required size of the buck-boost
transformer.
QUESTIONS WITH ANSWERS GRADED A+
◉ A buck-boost transformer is typically used to change voltage by
between ? and ? Answer: 5% / 25%
◉ When a buck-boost transformer has current less than nine amperes, an
overcurrent protection device is allowed to be rated at not more than ? of
the input current. Answer: 167%
◉ When a buck-boost transformer has current of nine amperes or more,
an overcurrent protection device is allowed to be rated at ? of the full-
load current. Answer: 125%
◉ A(n) ? can consist of current transformers wired to sense when an
unbalance of 50% or more is present in the line current. Answer: fault-
sensing system
◉ Which of the following are common methods of sizing a buck-boost
transformer? Answer: I. Determine the load current and the buck or
boost voltage and calculate the required size of the buck-boost
transformer.