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WorksheetsUltrasonics quiz
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
The instrument directly calibrated to show the depth of the sea is called
a)
Odometer
b)
Fathometer
c)
Lactometer
d)
Barometer
2.
The word SONAR is derived from
(a)
3.
-------------- are acoustical waves with frequencies higher than 20 kHz
(a)
4.
Crystal used for generating ultrasonic waves is
a)
quartz
b)
NaCl
c)
KCl
d)
Nickel
5.
The reflected signal is known as
(a)
6.
The distance of the sea can be calculated using the formula
a)
d=2v
b)
d=4v×l
c)
d=2v×t
d)
d=4v×t
7.
Which method is used to detect submerged submarines?
(a)
8.
ultrasonic waves are highly
(a)
9.
Which device transmits the ultrasonic waves towards the bed of the sea?
a)
Transmitter
b)
Transistor
c)
Transformer
d)
Transducer
10.
Which device transmits the ultrasonic waves towards the bed of the sea?
(a)
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