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3-58. Which of the following characteristics of
cooling water for electronic equipment
must be carefully controlled?
1. Purity
2. Pressure
3. Quantity
4. All of the above
3-59. For which of the following reasons do
personnel sometimes develop a false
sense of security concerning exposure to
radiation?
1. Rf radiation does not always produce
pain
2. Rf radiation is visible only at night
3. Only search radars are hazardous
4. Rf hazards occur only at night
3-60. Injury from X-rays would most likely
result from which of the following
actions?
1. Standing near unshielded high-
voltage components
2. Working alone on low-voltage power
supplies
3. Bypassing interlocks on shielded
equipment
4. Working too close to a crt with a
potential of 1,500 volts
