Chapter 4- Assignment

Question 1

The step down transformer is located on the:

a.) primary circuit
b.) secondary circuit
c.) filament circuit
d.) xray tube

Answer 1

c.) filament circuit

Question 2

The step up transformer is responsible for:

a.) raising current, decreasing voltage
b.) raising voltage, decreasing current
c.) raising current, raising voltage
d.) decreasing current, decreasing voltage

Answer 2

b.) raising .voltage, decreasing current

Question 3

The technologist chooses the desired kvp setting using the autotransformer through a process called:

a.) mutual induction
b.) self induction
c.) rectification
d.) voltage ripple

Answer 3

b.) self induction

Question 4

The step up transformer changes voltage through a process called:

a.) mutual induction
b.) self induction
c.) rectification
d.) voltage ripple

Answer 4

a.) mutual induction

Question 5

The rectifiers role in the xray circuit is to:

a.) convert AC to DC
b.) convert DC to AC
c.) keep a constant AC current
d.) convert high voltage to low voltage

Answer 5

a.) convert AC to DC

Question 6

Tube current is measured in:

a.) A
b.) mA
c.) voltage
d.) kilo voltage

Answer 6

b.) mA

Question 7

The solid state rectifier has an ______ acrystal and a ______ crystal.

a.) x and z
b.) a and b
c.) p and n
d.) a and c

Answer 7

c.) p and n

Question 8

The ampere is the unit of measure for:

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

Answer 8

c.) electric current

Question 9

The volt is the unit of measure for:

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

Answer 9

d.) electric potential

Question 10

An adjustable form of a resistot is the

a.) rheostat
b.) switch
c.) capacitor
d.) diode

Answer 10

a.) rheostat

Question 11

A material that has a large number of free elecrons is the:

a.) conductor
b.) insulator

Answer 11

a.) conductor

Question 12

The purpose of grounding is to:

a.) provide a source for electricity
b.) neutralize a charged object
c.) replace the circuit breaker
d.) to reprimand a bad circuit

Answer 12

b.) neutralize a charged object

Question 13

Which of the following materials is a good conductor?

a.) glass
b.) copper
c.) plastic
d.) all of the above

Answer 13

b.) copper

Question 14

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

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

Answer 14

b.) electric potential

Question 15

WHen a switch is closed electric current _________ and when a switch is opened electric current _________

a.) stops, flows
b.) stops, turns to AC
c.) becomes AC, becmones DC
d.) flows, stops

Answer 15

d.) flows, stops

Question 16

Electrostatics is also known as electricity.

a.) true
b.) false

Answer 16

b.) false

Question 17

A diode allows current to flow in alternating direction.
a.) true
b.) false

Answer 17

b.) false

Question 18

Highly magnetic materials are known as:

a.) diamagnetic
b.) paramagnetic
c.) ferromagnetic
d.) superdiametic

Answer 18

c.) ferromagnetic

Question 19

A filament is a tiny coil of wire housed in the cathode at the end of an xray tube.

a.) true
b.) false

Answer 19

a.) true

Question 20

The step down transformer is responsible for;

a.) raising current, decreasing voltage
b.) raising voltage, decreasing current
c.) raising current, rasing voltage
d.) decreasing current, decreasing voltage

Answer 20

a.) raising current, decreasing voltage

Question 21

The current passign between the secondary side of the high tension transformers and the rectifiers is best describes as a type of:

a.) high voltage (kv) ac
b.) low voltage ac
c.) high voltage (kV) dc
d.) low voltage dc

Answer 21

a.) high voltage (Kv) AC

Question 22

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

a.) compensate for variation of the Mas timer
b.) control the desired speed of the anode
c.) provide the desired filament charge
d.) maintain a constant voltage level

Answer 22

d.) maintain a constant voltage level

Question 23

The reduction of voltage and development of high amperage by a step down transformer occurs in the:

a.) prmary portion of the circuit
b.) secondary portion of the circuit
c.) high tension portion of the secondary circuit
d.) none of the above

Question 24

The line voltage compensator is located on the :

a.) primary side of the step up transformer
b.) on the secondary side of the autotransformer
c.) on the secondary side of the filament circuit
d.) on the primary side of the autotransformer

Answer 24

d.) on the primary side of the autotransformer

Question 25

Which of the following compenents are likely to be found in the primary circuit of a modern xray unit? Choose all that apply.

a.) autotransformer
b.) timer switch
c.) the anode of the xray tube

Answer 25

a.) autotransformer
b.) timer switch

Question 26

Which of the following devices can be used for the stoagre of electrical charge?

a.) rectifier
b.) transformer
c.) battery
d.) variac

Answer 26

c.) battery

Question 27

The type of unit to liekly prodice the smallest voltage ripple is a:

a.) full wave signle phase unit
b.) three phase six pulse unit
c.) self rectified unit
d.) high frequency unit

Answer 27

d.) high frequency unit