Chapter 4- Quiz B

Question 1

The volt is the unit of measure for:

a.) electric potential
b.) resistance
c.) electromagnetism
d.) electric current

Answer 1

a.) electric potential

Question 2

Most xray machines in the US are designed to operate on a 220 volt:

a.) 120 hertz, alternating current power supply
b.) 60 hertz, alternating current power supply
c.) 60 hertz, direct current power supply
d.) 50 hertz, direct current power supply

Answer 2

b.) 60 hertz, alternating current power supply

Question 3

Milliampere seconds (mA) is a unit of:

a.) electric current
b.) electroamgnetic force
c.) electric potential
d.) electrostatic charge

Answer 3

a.) electric current

Question 4

A circuit with a single path for elecctric current flow is defined as an:

a.) series circuit
b.) closed circuit
c.) open circuit
d.) parallel circuit

Answer 4

a.) series circuit

Question 5

The ability to do work because of a seperation of charges is:

Answer 5

electric potential

Question 6

Which of the following statements describe the location of the autotransformer within the xray circuit?

a.) between the step up transformer and the xray tube
b.) between the step down transformer and filament
c.) between teh rectifier bridge and the xray tube
d.) between the main power supply and the step up transformer

Answer 6

d.) between the main power supply and the step up transformer

Question 7

Which of the following current waveforms creates a constant voltage without any fluctuation of the polarity?

a.) half wave rectified alternating current
b.) unrectified alternating current
c.) full wave rectified alternating current
d.) direct current

Answer 7

d.) direct current

Question 8

A transformer is constructed with 100 turns on the primary side and 10 turns on the secondary side. What type of transformer is this?

a.) step up
b.) step down

Answer 8

b.) step down

Question 9

Voltage ripple for a single phase generator is:

a.) 13 percent
b.) 100 percent
c.) 1 percent
d.) 3.5 percent

Answer 9

b.) 100 percent

Question 10

A transformer with a greater number of wire turns on the primary side compared to the secondary side would be considered:

a.) step up
b.) step down

Answer 10

a.) step down

Question 11

The solid state rectifier has an _______ crystal and __________ crystal

Answer 11

p type & n type

Question 12

A line voltage compensator is incorporated into the primary circuit of a digital radiographic unit to:

a.) compensate for cariations MAS timer
b.) maintain a constant voltage coming into the circuit
c.) provide the desired filament charge
d.) control the desired speed of the anode

Answer 12

b.) maintain a constant voltage coming into the circuit

Question 13

An autotransformer is used to control which aspect of the xray circuit electrical supply?

a.) resistance
b.) rectification
c.) power
d.) voltage

Answer 13

d.) voltage

Question 14

Three phase generators use how many sources of current?

a.) 3
b.) 12
c.) 2
d.) 1

Answer 14

a.) 3

Question 15

The autotransformer is a singal coil of wire wrapped around an iron core. It operates on the principle of:

a.) self indcution
b.) mutual induction
c.) convection

Answer 15

a.) self induction