Biophysics - Senses Test
Microtest/labtest
- 1.If intensity of sound is increased 100times (100 people are talking all at once), then the intensity level of sound increases by
- A.
10 dB.
- B.
33 dB
- C.
66 dB
- D.
20 dB
- 2.Central visual field:
- A.
Corresponds to the angle of 0? - 25? with the optical axis of an eye
- B.
Corresponds to the angle of 0? - 35? with the optical axis of an eye
- C.
Corresponds to the angle of 0? - 40? with the optical axis of an eye
- D.
Corresponds to the angle of 0? - 30? with the optical axis of an eye
- 3.Visual sensitivity is defined as
- A.
Sensitivity (dB) = 10 x log (maximum intensity / set intensity
- B.
Sensitivity (dB) = 10 x ln (maximum intensity / set intensity
- C.
Sensitivity (dB) = 20 x log (maximum intensity / set intensity
- D.
Sensitivity (dB) = 20 x ln (maximum intensity / set intensity)
- 4.Relative audiogram:
- A.
Expresses values of hearing improvement in decibels in comparison with the values of normal threshold of hearing
- B.
Expresses hearing loss in decibels in comparison with the values of normal threshold of hearing
- C.
Expresses hearing loss in watts per square meter in comparison with the values of normal threshold of hearing
- D.
Expresses hearing improvement in decibels in comparison with the values of normal threshold of hearing (0,5 kHz, 1 kHz, 2 kHz, 4 kHz, 8 kHz
- 5.Perimetry is a method
- A.
For measuring distance between pupils of eyes
- B.
For examining visual field of eyes
- C.
For calculation of parameters of patient’s spectacles
- D.
For examination of accomodation abbility of lens
- 6.Watt per square meter is the unit for
- A.
Intensity of sound
- B.
Intensity level of sound
- C.
Loudness
- D.
Loudness level
- E.
No answer is correct
- 7.Minimal angle of resolution (MAR) and visual acuity (V) are approx. in the relation:
- A.
V = 1/MAR
- B.
V = log MAR
- C.
Log V = - log MAR
- D.
MAR = log V
- 8.Audiometer is an electroacoustic device which is constructed for:
- A.
Measuring an organ of hearing
- B.
Examination of function of organ of hearing
- C.
Pre-surgery measurement of an organ of hearing
- D.
Examination of middle ear functioning
- 9.The most frequent audiometric examination is determination of thresholds of hearing for pure tones, which is conducted:
- A.
By air conduction as well as by conduction through middle ear.
- B.
By spatial conduction as well as by bone conduction
- C.
By air conduction as well as by body conduction
- D.
By air conduction as well as by bone conduction
- 10.Normal hearing threshold for specific frequencies looks on a relative audiogram like
- A.
Vertical line
- B.
Horizontal line
- C.
Slanted at the angle of 45?
- 11.For examining visual acuity e. g. Snellen’s optotypes are used, to more objective methods belongs:
- A.
Lagrange rings
- B.
Larousse rings
- C.
Legendre rings
- D.
Landolt rings
- 12.Which of the series give frequencies that are one octave apart?
- A.
125 Hz, 250Hz, 500 Hz, 1000 Hz
- B.
100 Hz, 300 Hz, 900 Hz, 2700 Hz
- C.
50 Hz, 200 Hz, 800 Hz, 3200 Hz
- 13.The unit for intensity level of a sound is
- A.
Son
- B.
Decibel
- C.
Watt per square meter
- D.
No answer is correct
- 14.The threshold audiogram has
- A.
Frequencies on the horizontal line
- B.
Intensity levels on the horizontal line
- C.
The horizontal line corresponds to the left ear
- 15.The minimum separabile is used c also correct
- A.
For description of minimum distance of eyes
- B.
For determination of stereoscopic parallax
- C.
For description of angle resolution of eye
- D.
For design of glasses
- 16.Minimal angle of resolution (MAR) and visual acuity (V) are approx. in the relation:
- A.
V = 1/MAR
- B.
V = log MAR
- C.
Log V = - log MAR
- D.
MAR = log V
- 17.Velocity of the sound in air is 340 m/s. The vawelength of the harmonic tone of frequecy 1 kHz in air is
- A.
10 mm
- B.
34 mm
- C.
340 nm
- D.
1 mm
- E.
No answer is correct
- 18.Lens refraction capability is expressed by the physical quantity:
- A.
Called focal length
- B.
Called optical power
- C.
Called refractive index
- D.
Called optical radius
- 19.Punctum Remotum is
- A.
A point from which the eye can see sharply without accomodation
- B.
In finite distance for a normal eye
- C.
In infinite distance for a normal eye
- D.
A point from which an eye can see sharply at maximum accomodation
- 20.Minimum separabile
- A.
Is basis of evaluation of color perception
- B.
Is basic resolution of colours
- C.
Equals 1 by human eye
- D.
Equals 5 by human eye
- E.
Is eye resolution limit
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