Fluorescent

Question 1

The glass tube contains a ___________ such as argon or krypton.

Answer 1

starting gas

Question 2

What are the two-stage process is produced by fluorescent?

Answer 2

1. Electric current passes through a gas inside a glass tube and produces invisible ultraviolet (UV) radiation
2. The UV radiation is converted to visible light at the glass by a layer of phosphor powder which coats the inside surface of the fluorescent lamp.

Question 3

The color of fluorescent light is determined by the type of _________

Answer 3

phosphor used

Question 4

What two function that the ballast perform?

Answer 4

1. High starting voltage to ignite the tube
2. limits the current in the tube once the tube lights

Question 5

Compact fluorescent lamps: The two important advantages over incandescent is……

Answer 5

1. higher efficacy (more lumen per watts)
2. longer life

Question 6

The three bases most often used with fluorescent lamps are:

Answer 6

1. bipin
2. single pin
3. recessed double-contact

Question 7

Lamp size is usually indicated in ________ of an inch and is the diameter of the lamp at the widest place

Answer 7

eighth

Question 8

Catalogue designations for fluorescent lamps begin with an “__” except for compact fluorescent and a few other cases.

Answer 8

F

Question 9

If a substance is exposed to ultraviolet light or X-rays and emits visible light as result, then the substance said to be ________

Answer 9

fluorescing

Question 10

The three basic operating circuits of Ballasts are

Answer 10

Preheat circuit
Rapid-start Circuit
Instant start circuit

Question 12

_________ shapes (rings) are used
in bedside lamps and flat ceiling
fixtures.

Answer 12

Circline