Random Facts

Question 0

Microwave is / is not affected by air turbulence

Answer 0

Is not

Question 1

Placing progressively more difficult barriers / obstacles

Answer 1

Protection in depth

Question 2

Microwave penetrates :

Answer 2

Non-metal

Question 3

What is the best sensor when there is air movement and a sheet rock wall?

Answer 3

Microwave

Question 4

The most widely used motion sensor

Answer 4

Infrared

Question 5

Best sensor for a room with outside noise

Answer 5

Ultrasonic

Question 6

Transmission of several simultaneous messages on the same medium

Answer 6

Multiplexing

Question 7

Events occur in a prescribed time sequence on at a time, shorter distance

Answer 7

Time division multiplexing

Question 8

Simultaneous, multi-channel, longer distance

Answer 8

Frequency division multiplexing

Question 9

Lock with no moving parts

Answer 9

Electromagnetic

Question 10

Open when power fails

Answer 10

Fail-safe locns

Question 11

Lock when power fails (vault)

Answer 11

Fail-secure

Question 12

System operates at that location only, power source backup

Answer 12

Fail-soft