Identify the material used by Discharge lamps to produce light?
- electrically-charged gas
- halogens
- argon
- tungsten filament
Identify the rating-factor that needs to be applied to Discharge lights for the purposes of DIVERSITY?
- 1.8
- 2.5
- 1.2
- 0.8
Identify the gas found inside the starter of a fluorescent light fitting?
- neon
- mercury
- sodium
- argon
Identify the gas inside of a fluorescent light tube that provides the illumination?
- mercury
- iodine
- sodium
- argon
Identify one of the main functions of a ballast in a fluorescent light fitting?
- it regulates current flow
- it limits circuit resistance
- it improves the power factor of the lamp
- it helps the lamp start-up quicker
Identify one of the main functions of a ballast in a fluorescent light fitting?
- it helps the tube start-up by providing back-EMF
- it improves circuit efficiency
- it improves the power factor of the lamp
- it helps regulate the light emitted
Identify the component the improves the overall power factor of the fluorescent light fitting?
- a capacitor connected in parallel with the supply
- a capacitor connected in series with the supply
- a high-power ballast
- a low-power ballast
Identify the name of the 'heaters' at each end of a fluorescent tube?
- cathodes
- electrodes
- anodes
- starters
Identify the main component inside a 'standard' fluorescent lamp starter?
- bi-metallic strips
- interference emitter
- a blob of mercury
- fluorescent powder
How can stroboscopic effect caused by fluorescent lamps be reduced?
- use fitting with a Lag Lead arrangement
- by using a sodium-filled tube
- fitting each lamp to one single-phase circuit
- fit only daylight tubes
By fitting different fluorescent fitting to a different phase of a 3-phase system, what can be reduced?
- strobing
- each circuit current
- overall brightness emitted
- power factor
Identify the unit of measure for 'Luminous Flux'?
- Lumen
- Lux
- Candela
- watt
Identify the unit of measure for 'Illuminance'?
- Lux
- Lumen
- Candela
- watt
Identify the unit of measure for 'Luminous Intensity'?
- Candela
- Lumen
- Lux
- watt
Identify the term used to describe a gas that has been electrically-charged?
- ionised
- electrified
- neutralised
- inert
If a fluorescent tube glows at one end only and fails to start - Identify the likely fault?
- faulty tube
- faulty starter
- faulty ballast
- faulty power factor correction
Identify the alternative name for a ballast in a standard fluorescent lamp fitting?
- choke
- autotransformer
- ignitor
- regulator
If a fluorescent tube glows at each end and fails to start - Identify the likely fault?
- faulty starter
- faulty tube
- faulty ballast
- faulty power factor correction
Identify the type of fluorescent fitting that has the advantage of starting easily in low temperatures?
- semi resonant type
- glow-plug starter type
- high frequency type
- quick-start type
Identify the type of fluorescent fitting that has is immune from 'stroboscopic effects'?
- high frequency type
- glow-plug starter type
- semi resonant type
- quick-start type
Identify the type of fluorescent fitting that does not start easily if voltage drops too low?
- quick start type
- glow-plug starter type
- semi resonant type
- high frequency type
Identify the advantage of a high pressure mercury lamp?
- good colour quality
- low power usage
- operates easily at 110v AC
- low cost
Identify the term used to describe 'good quality light colour' from discharge lamps?
- good rendering
- good quality
- good efficacy
- good Lumen output
Identify the type of discharge lamp used to street-lighting providing an orange/yellow light colour?
- low pressure sodium
- high pressure mercury
- low pressure argon
- high pressure neon
Identify the name for a normal fluorescent lamp?
- low pressure mercury
- high pressure mercury
- high pressure argon
- low pressure sodium
Identify to operating voltage of a 'neon sign'?
- 10kV
- 400v
- 230v
- 15kv
How is 'radio-wave interference suppression' achieved in a fluorescent light circuit?
- a capacitor is fitted inside the starter
- a capacitor is installed across the Live and Neutral
- a low impedance ballast is used
- by operating the lamp at 230v AC only