Untitled Deck

Question 1

What is the classification for a low voltage electrical system which current flows through continuously, except when the circuit is open to allow a signal to be sent?

Answer 1

Closed

Question 2

What is the gas pressure inside the tube of a neon lamp when the electrode wire is tested with a high tension spark coil?

Answer 2

A minimum of 50mm under green

Question 3

Which of the following statements comparing two electric discharge signs is true if one has a smaller tubing diameter?

Answer 3

The load impedance in sign A is greater than that of sign B

Question 4

Corrosion currents are usually measured in?

Answer 4

Milliamps

Question 5

A brass service cock in a steel line would tend to become the?

Answer 5

Cathode

Question 6

What has been accomplished when the source and load impedance are made equal for maximum power transfer?

Answer 6

Impedance matching

Question 7

The ratio between a sound level that is just audible and other sound levels is indicated in?

Answer 7

Decibels

Question 8

What device corrects an impedance mismatch and connects cables to other cables or equipment?

Answer 8

Balun

Question 9

What error may be caused if a technician does not connect a terminator on an unused splitter port at the end of a TV distribution line?

Answer 9

Signal reflections or ghosting

Question 10

What keeps the alarm circuit activated even if the protective circuit is restored to normal?

Answer 10

Latching relay

Question 11

What is the strategy called when office telecommunication cables are routed into designated local cable rooms for room connections?

Answer 11

3 point connection

Question 12

What depth is a 40 foot wood pole set?

Answer 12

6 feet

Question 13

What is a primary advantage that optical fiber has over copper cable pairs?

Answer 13

EMI immunity

Question 14

What eliminates electromagnetic interference from entering a hard wired alarm system control panel?

Answer 14

Fiber optic cable

Question 15

An ohmmeter reading of zero ohms indicates which of the following?

Answer 15

A short circuit

Question 16

What is a voltmeter used to measure?

Answer 16

Electric pressure

Question 17

An ohm meter reading of infinity indicates which of the following conditions?

Answer 17

Open circuit

Question 18

Electrical pressure or electromotive force is measured in?

Answer 18

Volts

Question 19

What is the ability of a material to permit the flow of electrons through it called?

Answer 19

Conductance

Question 20

All of the following are incandescent lamp base types except?

Answer 20

Standard

Question 21

What will happen to the reading on an ammeter set to low if you wrap the wire around twice?

Answer 21

Double the reading

Question 22

What type of power does an alternator produce?

Answer 22

AC

Question 23

What is it customary to refer to electromotive force as?

Answer 23

Voltage

Question 24

How are fuses rated?

Answer 24

Both amperes and voltage

Question 25

What procedure helps defeat tampering with a shunt lock on older systems?

Answer 25

Wiring the shunt lock directly to the alarm panel

Question 26

What type of relay continues the annunciator when power is no longer applied?

Answer 26

Drop latch

Question 27

All of the following are space detectors except?

Answer 27

Bill trap detector