Electrical Engineering · Question Bank

Illumination

101 of 143 questions match · page 2 of 6. Answer in your head first, then check the solution.

📘 EE Mock Board Exam
TypeAll 143Problem solving 42Objective 101
DifficultyAll 101Easy 101MediumHard
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#21📘 reviewer_appEasy
Dispersion is used to describe the
Asplitting of white light into its component colors
Bpropagation of light in straight lines
Cbending of a beam when it goes from one medium to another
Dbending of beam light when it strikes a mirror
#22📘 reviewer_appEasy
Luminance efficiency is minimum for a
Afluorescent tube
Bhigh wattage light bulb
Cmercury vapor lamp
Dlow wattage light bulb
#23📘 reviewer_appEasy
An object farther from a converging lens than its focal point always has a/an _____ image.
Ainverted
Bthe same in size
Cvirtual
Dsmaller size
#24📘 reviewer_appEasy
An object nearer to a converging lens than its focal point always has a/an _____ image.
Ainverted
Bthe same in size
Csmaller
Dvirtual
#25📘 reviewer_appEasy
The depth of an objects submerged in a transparent liquid
Aalways seems less than its actual depth
Balways seems more than its actual depth
Cmay seem more than its actual depth, depending on the index of refraction of the liquid
Dmay seem less or more than its actual depth, depending on the angle of view
#26📘 reviewer_appEasy
Total internal reflection can occur when light passes from one medium to another
Athat has a lower index of refraction
Bthat has a higher index of refraction
Cthat has the same index of refraction
Dat less than the critical angle
#27📘 reviewer_appEasy
The brightness of light source is called its luminous intensity, whose unit is
Acandela
Blux
Clumen
Dfootcandle
#28📘 reviewer_appEasy
Luminous efficiency is least for a
Alow-wattage light bulb
Bmercury vapor lamp
Chigh-wattage light bulb
Dfluorescent tube
#29📘 reviewer_appEasy
The minimum illumination recommendation for reading is
A8000 cd
B8000 lx
C8000 lm
D800 W
#30📘 reviewer_appEasy
The solid angle subtended by a hemisphere about its center is
Api/2 sr
B2pi sr
Cpi sr
Ddepends on the radius of the hemisphere
#31📜 EE Pre-Board August 2012📘 PowerhouseEasy
The gas inside the inner discharge tube of a sodium vapor lamp is
AArgon
BNeon
CNitrogen
DHelium
#32📜 EE Pre-Board August 2012📘 PowerhouseEasy
This is a lighting system wherein the percentage of upward and downward brightness is the same.
AGeneral Diffuse
BDirect
CIndirect
DSemidirect
#33📜 EE Pre-Board March 2013📘 PowerhouseEasy
What do you call the interior lighting where the roof trusses or ceiling height is greater than 7.6 m above floor level.
AHID
BHigh Bay
CHigh mast
DHigh pressure sodium
#34📜 EE Pre-Board March 2013📘 PowerhouseEasy
The luminous intensity of a lamp is expressed in
Alux
Blumens
Ccandela
Dfoot-candle
#35📜 EE Pre-Board August 2013📘 PowerhouseEasy
The power factor of incandescent bulb is
A0.8 lagging
B0.8 leading
Cunity
Dzero
#36📜 EE Pre-Board March 2014📘 PowerhouseEasy
The meter movement in an illumination meter directly measures
Acurrent
Bvoltage
Cpower
Denergy
#37📜 EE Pre-Board August 2014📘 PowerhouseEasy
A direct lighting fixture directs at least
A90 of the light downward
B85 of the light downward
C85 of the light upward
D80 of the light downward
#38📜 EE Pre-Board March 2015📘 PowerhouseEasy
The ratio of lumens reaching the work plane divided by the total lumens generated by the light is:
ARoom ratio
BCoefficient of utilization
CIllumination factor
DMaintenance factor
#39📜 EE Pre-Board March 2017📘 PowerhouseEasy
The study of illumination involves
Adesign of lighting system
Bstudy of lighting and wiring system
Ccalculation of wiring sizes for various lighting fixtures
Dstudy of photometry and its application
#40📜 EE Pre-Board March 2018📘 PowerhouseEasy
The luminous intensity is defined as
Alumen per square meter
Bluminous flux per unit solid angle
Cillumination per square meter
Dcandela per unit solid angle

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