1.
Unit of luminous flux?
(A)
Candle power
(B)
Lux
(C)
Lumen
(D)
Meter Cadle
Answer-
(C) Lumen
2.
Which is the unit of luminous intensity?
(A)
Candle power
(B)
Lumen
(C)
lumen flux
(D)
None of the above
Answer-
(A) Candle Power
3.Solid
angle is a unit of ?
(A)
degree
(B)
Stredian
(C)
Radian
(D)
None of the Above
Answer
- (B) Stredian
4.
Which lamps more use for illumination?
(A)
Carbon Filament Lamp
(B)
Arc Lamp
(C)
Tungsten Filament Lamp
(D)
None of the above
Answer
- (C) Tungsten Filament Lamp
5.
Which lamp is used in a cinema projector?
(A)
Carbon Arc Lamp
(B)
Carbon Filament Lamp
(C)
Neon Lamp
(D)
Gas Discharge Lamp
Answer-
(A) Carbon Arc Lamp
6. Mercury Vapor Lamp is filled with gas?
(A)
Hydrogen
(B)
Argon
(C)
Helium
(D)
Neon
Answer-
(B) Argon
7.
Mercury Vapor Lamp has the function of auxiliary electrode ..........?
(A)
Assisting in starting
(B)
Voltage reduction
(C)
reducing current
(D)
giving more light
Answer-
(A) Assisting in starting
8.
Mercury Vapor Lamp is made?
(A)
M.A.T, M.A. And A.B.T. Type
(B)
M.A., M.B. And M.A.T. Type
(C)
M.A.T.B.C.T. And A.B.T. Type
(D)
None of the above
Answer-
(B) M.A., M.B. And M.A.T. Type
9. High
pressure Mercury Vapor Lamp has a working temperature?
(A)
600 degree centigrade
(B)
680 degree centigrade
(C)
800 degree centigrade
(D)
1200 degree centigrade
Answer
- (A) 600 degree centigrade
10.
Mercury Vapor Lamp is filled with gas?
(A)
Neon Gas
(B)
Helium
(C)
Nitrogen
(D)
Hydrogen
Answer-
(A) Neon Gas
11.What
is the working temperature of Sodium Vapor Lamp?
(A)
250 degree centigrade
(B)
300 degree centigrade
(C)
450 degree centigrade
(D)
600 degree centigrade
Answer
- (B) 300 degree centigrade
12.
Sodium Vapor Lamp has light color?
(A)
Blue
(B)
Red
(C)
Yellow
(D)
White
Answer
- (C) Yellow
13.
Which lamp takes longer time to light up completely?
(A)
Sodium Vapor Lamp
(B)
Mercury Vapor Lamp
(C)
Tungsten Filament Lamp
(D)
Neon Lamp
Answer-
(A) Sodium Vapor Lamp
14.
Sodium Vapor lamps produce light?
(A)
20 to 30 lumens per watt
(B)
40 to 50 lumens per watt
(C)
55 to 75 lumens per watt
(D)
85 to 105 lumens per watt
Answer-
(B) 40 to 50 lumens per watt
15.
Which Gas are filled in fluorescent tube ?
(A)
Mercury Vapor
(B)
Neon
(C)
Mercury and Argon
(D)
Helium and Mercury
Answer-
(C) Mercury and Argon
16.
What is the across voltage of the starter in the working state?
(A)
110 volts
(B)
180 volts
(C)
220 volts
(D)
zero
Answer-
(A) 110 volts
17.
Fluorescent tube has light capacity?
(A)
40 lumens / watt
(B)
45 lumens / watt
(C)
60 lumens / watt
(D)
75 lumens / watt
Answer-
(C) 60 lumens / watt
18.
The lamp that gives direct light when the filament is heated?
(A)
Incandescent Lamp
(B)
Neon Lamp
(C)
Gains discharge lamp
(D)
arc lamp
Answer-
(A) Incandescent Lamp
19.The
diameter of the tube is 40 watts?
(A)
12 mm
(B)
25 mm
(C)
30 mm
(D)
38 mm
Answer
- (D) 38 mm
20.
Gas are filled inside the tube starter?
(A)
Helium
(B)
Neon
(C)
Argon
(D)
None
Answer-
(A) Helium