1. The angle of refraction is described by
(A) Snell's law
(B) Curie's principle
(C) Huygen's principle
(D) speed differences
(Ans: A)
2. What is the average velocity of ultrasound in soft tissue at 5.0 MHz ?
(A) 1540 meters per millisecond
(B) 2200 miles per hour
(C) 1087 meters per second
(D) 1540 meters per second
(Ans: D)
3. Velocity times density equals
(A) intensity
(B) duty factor
(C) quality factor
(D) impedance
(Ans: D)
4. In a cathode ray tube display device the electron beam is steered by
(A) deflection plates
(B) phased arrays
(C) photon converters
(D) voltages from the scan converter
(Ans: A)
5. The binary number 1011000 equals the decimal
number
(A) 64
(B) 101
(C) 88
(D) 1342
(Ans: C)