What are the two main factors that affect the velocity of sound in seawater? - correct answer The temperature and salinity of the water.
A sound wave traveling from an area of warm water into an area of cold water will be affected in what way? - correct answer It will bend toward the area of cold water.
Sonobuoys that transmit an acoustic pulse and detect a resulting echo are classified as what type of sonobuoy? - correct answer Active sonobuoys
Sonobuoys equipped with an EFS system have what capability? - correct answer The capability of selecting channel, life and depth settings
What information can a DIFAR sonobuoy provide that a LOFAR sonobuoy cannot? - correct answer Submarine bearing.
Which of the following sonobuoys provides water temperature data? - correct answer BT sonobuoys
The OTPI system provides what information to the USW pilot? - correct answer Sonobuoy bearing information with respect to aircraft heading.
What type of naval aircraft employs the AN/ASQ-13F dipping sonar system? - correct answer SH60-F
On a dipping sonar system, what component generates and transmits sound energy into the water? - correct answer The transducer.
What does the acronym IFF stands for? - correct answer Identification Friend or Foe What are the three basic steps in the identification process of a typical IFF system? - correct answer Challenge, decode, and reply
True or False. All naval aircraft contain an interrogator system. - correct answer False
What is the pulse spacing of Mode 1? - correct answer 2.9 to 3.1 microseconds
Of the six modes of IFF operation, which one is used by military and civilian aircraft control stations? - correct answer Mode 3/A
What mode IFF is the military encrypted mode? - correct answer Mode 4
What is the transmission frequency of the interrogator? - correct answer 1030MHz
In a typical IFF/SIF system, what total number of codes can be selected in Mode 2? - correct answer 4096
The Identification of Position (I/P) pulse is used for what purpose? - correct answer It is used to identify
a specific friendly aircraft among other friendly aircraft that reply with the same code.
What mode of IFF is set prior to takeoff by maintenance personnel? - correct answer Mode 2
Where are Modes 1 and 3/A selected on the AN/APX-72 transponder set? - correct answer By thumbwheel switches on the front of the control box.
What part of the APX-72 system provides for ground or in-flight transponder testing capability? - correct
answer The Transponder Test Set TS-1843/APX
The AN/APX-72 generates a signal of what frequency when interrogated? - correct answer 1090 MHz
The interrogator works in conjunction with what other aircraft system? - correct answer The radar. What component of the interrogator set is used to select SIF reply codes for Modes 1, 2, and 3/A? - correct answer C-7383/APX-76(V) control box
What component monitors the timing triggers, pre-triggers, gates, and test video and causes the fault indicator lamp on the interrogator control to illuminate when a fault has been detected within the system? - correct answer Electronic Synchronizer SN-416/APX-76(V)
The APX-100 transponder set is available in what number of configurations? - correct answer The system comes in two configurations.
To respond to Mode 4 interrogations, the IFF transponder set system requires what additional components? - correct answer Transponder Computer KIT-1/TSEC
What APX-100 system is referred to as the rack-mounted configuration? - correct answer Receiver/Transmitter RT-1157/APX-100
Who is responsible for safety? - correct answer All hands.
What precaution should you take before removing a fuse? - correct answer De-energize the circuit
What is required for an individual to perform CPR? - correct answer Certified CPR training
Where can you find danger areas for a particular aircraft? - correct answer MIM
Who should be standing by while working on energized equipment? - correct answer Someone qualified to render first aid
What criterion determines shock intensity? - correct answer Current
. Which tools should not be etched? - correct answer Beryllium-copper tools