RT4IMEQMA-MIDTERM Reviewer

What is the purpose of the protective housing in an X-ray tube?

• a. To provide mechanical support to the X-ray tube

• b. To protect the X-ray tube from rough handling

• c. To guard the radiologic technologist against electric shock

• d. All of the above

What is the material commonly used for the anode in an X-ray tube?

• a. Graphite

• b. Copper

• c. Molybdenum

• d. All of the above

What is the function of the cathode in an X-ray tube?

• a. To release electrons

• b. To provide mechanical support to the target

• c. To dissipate heat

• d. To convert alternating current to direct current

What is the main advantage of three-phase power in producing X-rays?

• a. Higher voltage ripple

• b. Lower voltage ripple

• c. Higher radiation quantity

• d. Lower radiation quality

What is the formula for calculating power rating in a three-phase power and high frequency generator?

• a. PowerRating(kW) = milliAmpere(mA) x kiloVolts(kV) / 1000

• b. PowerRating(kW) = 0.7 x milliAmpere(mA) x kiloVolts(kV) / 1000

• c. PowerRating(kW) = (1.35) x milliAmpere(mA) x kiloVolts(kV) / 1000

• d. PowerRating(kW) = (1.41) x milliAmpere(mA) x kiloVolts(kV) / 1000

What is the purpose of an automatic exposure control (phototimer) in an X-ray machine?

• a. To measure the quantity of radiation reaching the image receptor

• b. To terminate the exposure when the desired density is attained

• c. To control the mAs and kVp settings

• d. All of the above

Similar to anode cooling chart and is used in precisely the same way but for the housing of the tube

• House Cooling Chart

• Radiographic Rating Chart

• House Chart

• Anode Cooling Chart

What is the purpose of the anode cooling chart?

• a. To convey which radiographic techniques are safe for X-ray tube operation

• b. To show the time required for the heated anode to cool

• c. To measure the thermal energy in heat units

• d. To determine the maximum heat unit capacity of the X-ray tube

What is the material commonly used for the anode in an X-ray tube?

• iron

• copper

• tungsten

• aluminum

What is the formula for calculating power rating in a single phase power

• Power Rating = (0.7) milliAmpere (mA) x kiloVolts (kV) - 1000

• Power Rating = (0.7) milliAmpere (mA) x kiloVolts (kV) /1000

• Power Rating = (0.7) milliAmpere (mA) x kiloVolts (kV) x 1000

• Power Rating = (0.7) milliAmpere (mA) + kiloVolts (kV)/1000