2-33.   Scientific studies have shown that people cannot easily sense electromagnetic radiation (EMR).     What EMR frequency range presents a hazard to humans? 1.   10 Hz to 300 Hz 2.   10 kHz to 300 GHz 3.   10 THz to 300 THz 4.   1000 Hz to 3000 Hz 2-34.   Hazards of Electromagnetic Radiation to Ordnance (HERO) is one category of radiation hazards.     What are the other two categories? 1.   HERP and HERD 2.   HERF and HERR 3.   HERD and HEED 4.   HERP and HERF 2-35.   What type of devices can actuate prematurely in ordnance systems due to RFR? 1.   Electro-optical devices 2.   Electromagnetic devices 3.   Electroexplosive devices 4.   Electromechanical devices 2-36.   When are ordnance systems most susceptible to RFR energy? 1.   During loading only 2.   During unloading only 3.   During assembly 4.   During disassembly only 2-37.   The radiation hazard HERO can be broken down into three classifications.   In which of the following conditions is an item considered to be HERO unsafe? 1.   The item is being assembled 2.   The item contains 3.   The item is sufficiently shielded from 4.   The item, through testing, has been proven to be adversely affected by 2-38.   Which of the following publications will list your ship’s specific requirements for HERO safety? 1.   Naval Sea Systems Command instruction 2.   EMCON bill 3.   NAVSEA OP 3565 4.   NAVAIR 16-1-529 2-39.   Who is responsible for the implementation of HERO requirements? 1.   Commanding officer 2.   Executive officer 3.   Safety officer 4.   All hands 2-40.   Which of the following publications lists specific guidance about fueling operations and radar on your ship? 1.   EXCON bill 2.   NAVSEA OP 3565 3.   NAVELEX volume I 2-41.   According to table 3-1 in the text, what is the maximum permissible exposure time limit for a fixed-beam hazard with the AN/SPY-1 radar transmitter? 1.   0.023 minute 2.   0.23 minute 3.   3.2 minutes 4.   6 minutes 2-42.   Which of the following changes in frequency increases the likelihood of biological damage from RFR? 1.   A decrease in frequency only 2.   An increase in frequency only 3.   Either an increase or decrease in frequency 2-43.   A navigational radar with a frequency of 900 MHz may cause what type of damage, if any, to body tissues? 1.   Minor damage 2.   Damage to surface skin 3.   Deep tissue damage 4.   None 2-44.   Which of the following parts of the electromagnetic spectrum can cause damage to the transparent lens of the eye? 1.   Ultraviolet 2.   Infrared 3.   Radio frequency 4.   All of the above 2-45.   Permanent injury to the testicles can happen because of which of the following   hazard conditions? 1.   An extremely high dosage of RF 2.   High exposure of RF for many years 3.   Both 1 and 2 above 10