Rad B&P ch 10 Part 2

1.

1 point

Regulations require that the MPDE in an uncontrolled area is:

100 mrem

200 mrem

2 mrem

50 mrem

2.

1 point

The prime exposure factor that determines the energy (penetrating power) of the radiation beam is called:

mAs

Kilovoltage

mA

3.

1 point

________ of masonry is equivalent to 1/16th inch of lead equivalent

2 inches

6 inches

4 inches

8 inches

4.

1 point

When lead is used in a secondary barrier it is usually only:

1/64" thick

1/16" thick

1/8" thick

1/32" thick

5.

1 point

Regulations also require that the control booth wall have a leaded glass window for patient observation with:

1.0 mm Pb/equivalent

2.0 mm Pb/equivalent

0.5 mm Pb/equivalent

1.5 mm Pb/equivalent

6.

1 point

Regulations require that the control booth be designed to limit the operator dose to:

100 mRem/month

100 mRem/min/mA @ 80 kv

100 mRem/hr @ 1 meter

100 mRem/wk

7.

1 point

Room should be designed so that the primary beam should scatter ______ before reaching the control panel

twice

three times

doesn't matter

once

8.

1 point

When determining barrier protection, the maximum ______ that the machine can produce is used as the measure of beam energy.

kVp

mA

mAs

9.

1 point

Reduces the intensity to 1/10th of its original value; used in industrial applications

Tenth Value Layer

Half Value Layer

10.

1 point

Operator control booths are always considered to be:

Secondary barriers

Primary barriers

11.

1 point

Secondary protective barriers do not always require leaded walls. Some secondary barrier walls can be constructed using:

4 thicknesses of 1/4" sheet rock

4 thicknesses of 5/8" sheet rock

3 thicknesses of 5/8" sheet rock

10 thicknesses of 1/2" sheet rock

12.

1 point

Any area in the department that is not a controlled area and is occupied by the public is a:

restricted area

uncontrolled area

controlled area

13.

1 point

As kVp values increase more protection material will have to be included in all primary and secondary barriers

True

False

14.

1 point

The protective shielding provided by a primary barrier must extend from the floor to a height of no less than:

6 feet

10 feet

7 feet

8 feet

15.

1 point

the amount of material needed to reduce the intensity of a beam to half; used in medical design

Half Value Layer

Tenth Value Layer

16.

1 point

Primary protective barriers are usually constructed of sheet rock or wood paneling to which is bonded a layer of lead. Layer of lead is up to:

1/8th of an inch thick

1/32nd of an inch thick

1/64th of an inch thick

1/16th of an inch thick

17.

1 point

An area adjacent to the wall of an x-ray room and used only by occupationally exposed persons is a:

controlled area

restricted area

uncontrolled area

18.

1 point

Regulations require that the maximum weekly permitted dose equivalent (MPDE) in a controlled area is:

50 mrem

200 mrem

2 mrem

100 mrem