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RTE1613 Radiographic Physics > Unit 5 Jeopardy and Quiz questions > Flashcards

Unit 5 Jeopardy and Quiz questions Flashcards

1
Q

The reason an x-ray circuit requires AC is:

a. Because the x-ray tube requires AC in order to function
b. Because the rectification system will not work with DC
c. Because mutual induction is not possible without AC
d. Because the rectification system will not work with AC

A

because mutual induction is not possible without AC

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2
Q
  1. The rectification system converts:

a. DC into AC
b. AC into DC
c. AC/DC into kilovolts
d. Kilovolts into AC/DC

A

AC into DC

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3
Q
  1. The secondary side of the step-up transformer is located in the secondary x-ray circuit and is responsible for: (multiple)

a. Converting low voltage into kilovoltage
b. Converting voltage using the process of self induction
c. Converting kilo-voltage into low voltage
d. Converting voltage using the process of mutual induction

A

converting voltage into kilovoltage

converting voltage using the process of mutual induction

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4
Q
  1. Tube current is measured in:

a. mA
b. A
c. Voltage
d. Kilo-voltage

A

mA

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5
Q
  1. When potential difference (kVp) is applied across the x-ray tube, current flows from:

a.The mA meter to the kVp meter
b.Cathode to anode
c.The kvp meter to the mA meter
d.Anode to cathode

A

cathode to anode

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6
Q
  1. Electrons are converted into x-ray photons in the: (choose multiple)

a. Filament circuit
b. Secondary circuit
c. Primary circuit
d. X-ray tube

A

primary circuit
x-ray tube

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7
Q
  1. The rectification system is located:

a. On the primary side of the x-ray circuit
b. Between the secondary side of the step-up transformer and the x-ray tube
c. Between the autotransformer and the step-up transformer
d. Between the primary side of the step-up transformer and the x-ray tube

A

between the secondary side of the step-up transformer and the x-ray tube

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8
Q
  1. The secondary circuit contains:

a. The autotransformer, the step-up transformer, and the x-ray tube
b. The primary side of the step-up transformer, the kVp meter, and the x-ray tube
c. The rectification system, the step-down transformer, and the x-ray tube
d. The secondary side of the step-up transformer, the rectification system, and the x-ray tube
e. The autotransformer, the step-down transformer, and the x-ray tube

A

the secondary side of the step-up transformer, the rectification system, and the x-ray tube

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9
Q

9.X-ray photons are produced when electrons produced at tungsten filament interact with the:

a. Focusing cup
b. Anode
c. Effective focal spot
d. Glass envelope

A

anode

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10
Q

The rectification system is responsible for:

a. Increasing current before it reaches the x-ray tube
b. Allowing current to only flow in one direction
c. Decreasing current before it reaches the x-ray tube
d. Allowing current to flow in more than one direction

A

allowing current to only flow in one direction

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11
Q
  1. The step-down transformer is located in the:

a. Primary circuit
b. Filament circuit
c. Secondary circuit
d. X-ray tube

A

filament circuit

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12
Q

The process of creating electrons through heating a tungsten filament is referred to as:

a. Potential difference
b. mA
c. thermionic emission
d. rectification

A

thermionic emission

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13
Q
  1. Decreasing voltage to the filament circuit will result in: (choose multiple)

a.Decreased thermionic emission
b.Increased electron production at the cathode
c.Increased thermionic emission
d.Decreased electron production at the cathode

A

increased electron production at the cathode

increased thermionic emission

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14
Q

14.The rheostat is a variable resistor and is located:

a. On the secondary side of the step-down transformer
b. On the primary side of the step-up transformer
c. On the secondary side of the step-up transformer
d. On the primary side of the step-down transformer

A

on the primary side of the step-down transformer

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15
Q

15.In a step-down transformer, which coil has the most wire turns?

a. Primary coil
b. Secondary coil
c. Both have the same number of turns

A

primary coil

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16
Q
  1. The step-down transformer is responsible for:

a.Raising voltage and raising current
b.Lowering voltage and lowering current
c.Raising voltage and lowering current
d.Lowering voltage and raising current

A

lowering voltage and raising current

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17
Q

Voltage to the filament circuit is provided by:

a. The step-up transformer
b. The step-down transformer
c. The autotransformer
d. mA meter

A

the autotransformer

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18
Q

filament temperature is controlled by the:

a. mA meter
b. filament current
c. the step-up transformer
d. tube current

A

filament current

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19
Q

Which of the following are necessary for the process of mutual induction?

a. DC
b. Rectifiers
c. AC/DC
d. AC
e. Electronic diodes

A

AC

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20
Q

What is the relationship between filament current and voltage coming from the secondary side of the step-down transformer?

a. Functional relationship
b. Indirect relationship
c. Co-dependent relationship
d. Direct relationship

A

indirect relationship

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21
Q

what was oersted’s great discovery?

A

electric current generates a magnetic field

22
Q

define an electrical ground:

A

object that is always available to accept electric charge (Earth)

23
Q

What is the SI unit for power?

A

Watt

24
Q

name the four electrical states

A

insulator
conductor
semiconductor
superconductor

25
Q

where is the mA meter located?

A

center tap on the secondary side of the step-up transformer

26
Q

this device will “break” the circuit in order to prevent damage to the circuit

A

circuit breaker

27
Q

what are the three different ways electrification can be created?

A

conduction (contact)
induction
friction

28
Q

what was faraday’s great discovery?

A

an alternating magnetic field will generate current

29
Q

Which type of electromagnetic induction is taking place in the primary circuit?

A

self induction

30
Q

voltage ripple on a three phase, six pulse is:

A

14%

31
Q

which part of the x-ray tube uses electromagnetism?

A

spinning anode

32
Q

nearly all types of discussions of electric charges deal with which type of sub-atomic particle?

A

electron

33
Q

a motor uses ______ to create _______

A

AC; work

34
Q

which type of electromagnetic induction is taking place in the filament circuit?

A

mutual induction

35
Q

what is the typical operating range of the filaments inside the x-ray tube?

A

3-6 A

36
Q

why are AC/DC both important to x-ray production?

A

mutual induction needs AC

x-ray tube needs DC

37
Q

this device adjusts voltage to the autotransformer to precisely 220 V.

A

line compensator

38
Q

what is the formula for calculating the heat units while using a high frequency generator?

A

1.41 x kVp x mA x seconds

39
Q

how does temperature affect electrical resistance?

A

increasing temperature will increase resistance

40
Q

this device only allows current to travel in one direction

A

rectifier/diode

41
Q

walking across a deep pile carpet will induce electrification by what means?

A

friction

42
Q

what is the SI unit for current?

A

Amps

43
Q

what is the SI unit for tube current

A

mA

44
Q

in which circuit is the exposure timer typically located?

A

primary

45
Q

which type of exposure timer is the most sophisticated and accurate?

A

electronic

46
Q

consists of a single coil of iron with “taps” placed along its length:

A

auto transformer

47
Q

a generator uses _____ to create _____

A

work; AC

48
Q

this device measures the voltage supplied to the autotransformer:

A

line monitor

49
Q

which type of electromagnetic induction is taking place in the secondary circuit?

A

mutual

50
Q

this is a highly precise device that allows for adjusting voltage coming from the autotransformer:

A

rheostat

51
Q

why is a fully rectified single wave not ideal for x-ray creation?

A

there is inconsistent voltage, waste of power, and double exposure time

RTE1613 Radiographic Physics (9 decks)

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