ONLINE MCQ EE-ILLUMINATION 3

ONLINE MCQ EE-ILLUMINATION 3

Q21. Which of the following applications does not need ultraviolet lamps ?
A.  Car lighting
B.  Medical purposes
C.  Blue print machines
D.  Aircraft cockpit dashboard lighting

Ans. A

Q22. Which of the following is present inside the fluorescent tube ?

A.  Argon and neon
B.  Argon and CO2
C.  Mercury vapour
D.  Helium and oxygen

Ans. C

ONLINE MCQ EE-ILLUMINATION 3

Q23. In incandescent lamps, coiled coil filaments are used for
A.  coloured lamps
B.  higher wattage lamps
C.  gas filled lamps
D.  low wattage lamps

Ans. C

Q24. Illumination of one lumen per square metre is called
A.  lumen metre
B.  lux
C.  foot candle
D.  candela

Ans. B

Q25. In houses the illumination is in the range of
A.  2-5 lumens/watt
B.  10-20 lumens/watt
C.  35-45 lumens/watt
D.  60-65 lumens/watt

Ans. D

ONLINE MCQ EE-ILLUMINATION 3

Q26. The cost of a fluorescent lamp is more than that of incandescent lamp because of which of the following factors ?
A.  More labour is required in its manu­facturing
B.  Number of components used is more
C.  Quantity of glass used is more
D.  All of the above factors

Ans. D

Q27. ____ cannot sustain much voltage fluc­tuations.
A.  Sodium vapour lamp
B.  Mercury vapour lamp
C.   Incandescent lamp
D.  Fluorescent lamp

Ans. C

Q28. For normal reading the illumination level required is around
A.   20-40 lumens/m2
B.  60-100 lumens/m2
C.   200-300 lumens/m2
D.  400-500 lumens/m2

Ans. B

ONLINE MCQ EE-ILLUMINATION 3

Q29. Which gas can be filled in GLS lamps ?
A.  Oxygen
B.  Carbon dioxide
C.  Xenon
D.  Any inert gas

Ans. D

Q30. When an electric bulb is broken it produces bang, this is due to
A.  vacuum inside the bulb
B.  pressure of air in the bulb
C.  pressure inside is equal to that out­side
D.  none of the above

Ans. A