Key Topic 50: Safety

Question 1

8-50F1: Choose the most correct statement with respect to component damage from electrostatic discharge:

A. ESD damage occurs primarily in passive components which are easily identified and replaced.
B. ESD damage occurs primarily in active components which are easily identified and replaced.
C. The technician will feel a small static shock and recognize that ESC damage has occurred to the circuit.
D. ESD damage may cause immediate circuit failures, but may also cause failures much later at times when the RADAR set is critically needed.

Answer 1

D. ESD damage may cause immediate circuit failures, but may also cause failures much later at times when the RADAR set is critically needed.

Question 2

8-50F2: Before testing a RADAR transmitter, it would be a good idea to:

A. Make sure no one is on the deck.
B. Make sure the magnetron’s magnetic field is far away from the magnetron.
C. Make sure there are no explosives or flammable cargo being loaded.
D. Make sure the Coast Guard has been notified.

Answer 2

C. Make sure there are no explosives or flammable cargo being loaded.

Question 3

8-50F3: While making repairs or adjustments to RADAR units:

A. Wear fire-retardant clothing.
B. Discharge all high-voltage capacitors to ground.
C. Maintain the filament voltage.
D. Reduce the magnetron voltage.

Answer 3

B. Discharge all high-voltage capacitors to ground.

Question 4

8-50F4: While removing a CRT from its operating casing, it is a good idea to:

A. Discharge the first anode.
B. Test the second anode with your fingertip.
C. Wear gloves and goggles.
D. Set it down on a hard surface.

Answer 4

C. Wear gloves and goggles.

Question 5

8-50F5: If a CRT is dropped:

A. Most likely nothing will happen because they are built with durability in mind.
B. It might go out of calibration.
C. The phosphor might break loose.
D. It might implode, causing damage to workers and equipment.

Answer 5

D. It might implode, causing damage to workers and equipment.

Question 6

8-50F6: Prior to removing, servicing or making measurements on any solid state circuit boards from the RADAR set, the operator should ensure that:

A. The proper work surfaces and ESD grounding straps are in place to prevent damage to the boards from electrostatic discharge.
B. The waveguide is detached from the antenna to prevent radiation.
C. The magnetic field is present to prevent over-current damage or overheating from occurring in the magnetron.
D. Only non-conductive tools and devices are used.

Answer 6

A. The proper work surfaces and ESD grounding straps are in place to prevent damage to the boards from electrostatic discharge.