Wireman – Semester 2 Module 4 – Illumination
106 : Which is the unit of luminous intensity?
A : Candela
B : Lumen
C : Lumen/m2
D : Lumen/watt
107 : Which is defined as that the luminous flux reaching a surface perpendicularly per unit area?
A : Luminous flux
B : Illuminance
C : Luminous intensity
D : Lux
108 : Which is the property of good illumination?
A : Should cover huge area
B : Should have glaring light
C : Should be low consumption
D : Should not strain the eyes
109 : Which metal is used a filament incandescent lamps?
A : Nichrome
B : Tungsten
C : Eureka
D : Silver
110 : What is the name of cap marked as x of incandescent lamp?
A : Edison screw cap
B : Small bayonet cap
C : Bayonet cap
D : Giant edison screw cap
111 : Where halogen lamps are used?
A : Domestic lighting
B : Industrial lighting
C : TV photography
D : Out door lighting
112 : Which is coated in the tungsten filament of fluorescent tube lamp?
A : Barium and strontium oxides
B : Mercury
C : Sodium
D : Phosphor
113 : What is the expansion of CFL?
A : Compressed filament lamp
B : Cathode filament lamp
C : Common fluorescent lamp
D : Compact fluorescent lamp
114 : How strohoscopic effect is prevented in industrial twin tube light fitting?
A : By connecting a capacitor parallel to supply
B : By connecting a capacitor parallel to each tube
C : By connecting a capacitor series with one tube
D : By connecting a capacitor a series with both tube light
115 : Which type of fluorescent tube lamps are used for dimming and flashing circuits?
A : Instant start fluorescent lamp
B : Rapid start fluorescent tube lamp
C : Fluorescent lamp single tube lamp
D : Fluorescent lamp double tube lamp
116 : Which is cold cathode lamp?
A : Mercury vapour lamp
B : Fluorescent tube lamp
C : Halogen lamp
D : Neon lamp
117 : Which chemical composition powder gives green colour light in neon sign lamp?
A : Zinc silicate
B : Calcium tungstate
C : Cadmium borate
D : Magnesium tungstate
118 : Which position the MA type HPMV lamp is to be hung for lighting?
A : Horizontally
B : Vertically
C : Inclined
D : Any position
119 : What is the name the part marked as x in High Pressure sodium vapour lamp?
A : Electrode
B : ARC tube
C : Base
D : Sodium vapour
120 : Which colour light sodium vapour lamp gives?
A : Yellow
B : White
C : Blue white
D : Blue
121 : Which part of sodium vapour lamp fitting provides the ignition voltage initially and acts as a choke for limiting the current subsequently?
A : Ignitor
B : Leak transformer
C : Capacitor
D : Thermal starter
122 : Which is represented by the symbol?
A : Photovoltaic cell
B : LDR
C : NTC resistor
D : LED
123 : Which lamp acts only as switch instead of giving light?
A : LED
B : Miniature lamp
C : Flasher
D : Carbon filament lamp