# Rt Simulation Examination 2

100 Questions | Total Attempts: 137  Settings  This is a Simulated Examination for Gulf RT Examinations taken from Last Month's HAAD Feedbacks. This examination contains 100 of the most UPDATED EXAMS from Abu Dhabi, KSA, and UAE. Take this examination for 120 minutes. You need to get 86% to pass the HAAD. 60% to pass MOH, DHA, or Prometrics. Please text 0919-286-29-29 in the Philippines or visit our website www. Rtonline. Weebly. Com THIS IS YOUR ASSESSMENT FOR ANY GULF RT EXAMINATIONS INCLUDING HAAD RT, SAUDI PROMETRICS, DUBAI DHA, AND UAE MOH. THE QUESTIONS HERE ARE TAKEN FROM THIS ACTUAL EXAMINATIONS, SO PASSING THIS ASSESSMENT EXAM WILL GIVE YOU A HIGH PROBABILITY OF PASSING THE SAID EXAMINATIONS

• 1.
The dB is defined as the _______________ of two intensities
• A.

Sum

• B.

Difference

• C.

Product

• D.

Ratio

• 2.
If the power of a sound wave is increased by a factor of 8 how many decibles is this?
• A.

3 dB

• B.

6 dB

• C.

9 dB

• D.

8 dB

• 3.
An ultrasound system is set at 0 dB and is transmitting at full intensity.  What is the output power when the system is transmitting at 50% of full intensity?
• A.

-3dB

• B.

-50 dB

• C.

10 dB

• D.

3 dB

• E.

-10 dB

• 4.
An ultrasound system is set at 0 dB and is tranmitting at full intensity. What is the output power when the system is transmitting at 10% of full intensity?
• A.

- 3dB

• B.

-50 dB

• C.

40 dB

• D.

3 dB

• E.

-10 dB

• 5.
What may be a unit of amplitude?
• A.

Cm

• B.

Hz

• C.

Msec

• D.

Watts

• E.

None of the above

• 6.
A Doppler exam is performed with a 5MHz probe and a PRF of 15kHz.  Which of these Doppler shifts will create aliasing?
• A.

2 kHz

• B.

2.5 kHz

• C.

7.5 kHz

• D.

14 kHz

• 7.
According to the AIUM statement on bioeffects, there have been no confirmed bioeffects below intensities of __________ watts per square centimeter SPTA.
• A.

10

• B.

0.01

• C.

0.1

• D.

1

• E.

100

• 8.
Which of the following is not a measure of area?
• A.

Square cm

• B.

Meters squared

• C.

Cubic meters

• D.

Feet x feet

• 9.
Which of the following is true of all waves?
• A.

They travel through a medium

• B.

All carry energy from one side to another

• C.

Their amplitudes do not change

• D.

They travel in a straight line

• 10.
Is Intensity an acoustic variable?
• A.

True

• B.

False

• 11.
A force is applied to a surface.  If the force is tripled and the surface area over which the force is applied is also tripled, what is the new pressure?
• A.

Three times larger than the original

• B.

One third of the original

• C.

Six times more than the original

• D.

Unchanged

• 12.
Which of the following units are appropriate to describe the period of an acoustic wave?  More than one answer maybe correct.
• A.

Minutes

• B.

Microseconds

• C.

Meters

• D.

Mm/us

• 13.
Two waves arrive at the same location and interfere.  The resultant sound wave is smaller that either of the two original waves.  What is this called?
• A.

Constructive interference

• B.

Angular interaction

• C.

Destructive interference

• D.

In-phase waves

• 14.
Ultrasound is defined as a sound with a frequency of
• A.

Greater thatn 20,000 kHz

• B.

Less thatn 1 kHz

• C.

Greater than 10 MHz

• D.

Greater thatn 0.02 MHz

• 15.
Compare two sound waves. A and B.  The frequency of a wave A is one-third that of wave B.  How does the period of a wave A compare the period of wave B?
• A.

A is one-third as long a B

• B.

A is the same as wave B

• C.

A is three times as long as B

• D.

Cannot be determined

• 16.
Which of the following wave is ultrasonic and least useful in diagnotic ultrasound?
• A.

2 MHz

• B.

2000 Hz

• C.

24 kHz

• D.

7.5 MHz

• 17.
True of False:  With standard diagnostic imaging instrumentation, the sonographer has the ability to vary the amplitude of a sound wave produced by the transducer.
• A.

Ture

• B.

False

• 18.
The power of an ultrasound wave can be reported with which of the following units? More than one answer maybe correct.
• A.

Watts/square centimeter

• B.

DB/Cm

• C.

Watts

• D.

Kg/cm^2

• 19.
The maximum value of the density of an acoustic wave is 60 lb/in^2 while the minimum density is 20 lb/in^2.  What is the amplitude of the wave?
• A.

20 lb/in^2

• B.

40 lb/in^2

• C.

60 lb/in^2

• D.

None of the above

• 20.
The final amplitude of an acoustic wave is reduced to one-half of its original value.  The final power is _______ the original power.
• A.

The same as

• B.

One-half

• C.

Double

• D.

None of the above

• 21.
The amplitude of an acoustic wave decreases from 27 pascals to 9 pascals.  If the initial power in the wave was 27 watts, what is the wave final power?
• A.

3 watts

• B.

9 watts

• C.

1 watt

• D.

None of the above

• 22.
What are the units of intensity?
• A.

Watts

• B.

Watts/cm

• C.

Watts/cm^2

• D.

DB

• 23.
If the power in an ultrasound beam is unchanged, while at the same time, the beam area doubles, then the beams's intensity
• A.

Doubles

• B.

Is halved

• C.

Is quartered

• D.

Remains the same

• 24.
What happens to an acoustic beams's intensity when the power in the beam increases by 25% while the cross sectional area of the beam remain the same?
• A.

It increased by 25%

• B.

Increases by 75%

• C.

It increases by 50%

• D.

Decreases by 25%

• 25.
When the power in an acoustic beam is doubled and the cross sectional area of the beam is halved, then the intensity of the beam is
• A.

Doubled

• B.

Halved

• C.

Quartered

• D.

Four time larger

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