Highway Lighting – MCQ
1. Which factors influence night visibility on the highway?
a) Size of objects.
b) Brightness of Objects.
c) Reflecting Characteristics of the pavement surface.
d) All of these. 
2. Which factors are to be considered in the design of road lighting?
a) Luminaire distribution of light.
b) The spacing of light units.
c) Lighting layouts.
d) All of these.
3. The spacing of lighting units is influenced by
a) Electric distribution poles
b) illumination.
c) Road layout.
d) None of these.
e) All of these.
4. The BIS recommends an average level of illumination for the important road is
a) 10 lux
b) 20 lux
c) 30 lux
d) 40 lux
5. As per IRC the minimum verticle clearance required for electric power lines up to 650 volts is
a) 3 m
b) 5 m
c) 6 m
d) 10 m above the pavement surface
6. As per IRC, the minimum horizontal clearance required for lighting poles for the road with raised kerbs is
a) 0.6 m
b) 0.5 m
c) 0.4 m
d) 0.3 m from the edge of raised kerb.
[Note: Minimum 0.3 m, but the desirable value is 0.6 m from the edge of raised kerb.]
7. As per IRC, the minimum horizontal clearance required for lighting poles for the road without raised kerbs is
a) 1 m
b) 1.5 m
c) 2 m
d) 2.5 m from the edge of the carriageway
8. The minimum amount of highway lighting to be provided on urban roads is
a) 30 lux
b) 20 lux
c) 15 lux
d) 10 lux
[Note: For important roads with fast traffic 30 lux is recommended. For other main roads, it is recommended as 15 lux.]
9. The most cost-effective/economical layout of lighting for narrow roads is
a) Central
b) Staggered, on both side
c) Single side
d) None of these
10. Usually, the spacing between the highway lamps is
a) 10 m
a) 30 m
b) 60 m
c) 80 m
[Note: Usually spacing between two lamps is between 30 to 60 m. (it is not an exact value – because it depends on several factors, it is calculated by considering various factors.]
Read More: