Rad Science Unit II 1075

The primary purpose of the step-down transformer is to

• decrease the voltage going to the filaments

• decrease the amperage going to the filaments

• increase the voltage going to the filaments

• increase the amperage going to the filaments

The synchronous timer is the most widely used timer in today’s x-ray equipment.

• True

• False

The __ converts volts to kilovolts.

• step-up transformer

• step-down transformer

• autotransformer

• none of these

A general purpose radiographic tube typically has __ filament(s).

• one

• two

• three

• four

The selection of the large or small filament in the cathode depends on the choice of focal spot size at the operating console and the

• exposure time selected

• kVp selected

• mA station selected

• none of these

Which of the following opens a circuit to keep the circuit and devices safe?

• Fuse

• Resistor

• Circuit breaker

• Conductor

Four rectifiers will produce

• alternating current

• half-wave rectified current

• full-wave rectified current

• indirect current

The filaments within the x-ray tube are found on the

• primary circuit

• secondary circuit

• filament circuit

• none of these

The only adjustable transformer in the x-ray circuit is the

• primary side of the high voltage transformer

• secondary side of the high-voltage transformer

• autotransformer

• step-down transformer

The step-down transformer is found on the

• primary circuit

• secondary circuit

• filament circuit

• none of these