ONLINE MCQ EE-ILLUMINATION 2

ONLINE MCQ EE-ILLUMINATION 2

Q11. photometer is used for comparing ‘the lights of different colours ?
A.  Grease spot
B.  Bunsen
C.   Lummer brodhum
D.  Guilds flicker

Ans. D

Q12. ____ is a cold cathode lamp.

A.   Fluorescent lamp
B.  Neon lamp
C.   Mercury vapour lamp
D.  Sodium vapour lamp

Ans. B

Q13. The flicker effect of fluorescent lamps is more pronounced at

A.  lower frequencies
B.  higher frequencies
C.  lower voltages
D.  higher voltages

Ans. A

ONLINE MCQ EE-ILLUMINATION 2

Q14. Glare is reduced by

A.  using diffusers
B.  increasing the height of the lamp
C.  using reflectors to cut-off the light at certain angle
D.  all of the above

Ans. D

Q15. In fluorescent tubes ballast resistance is connected in series with the choke

A.  to reduce stroboscopic effects
B.  when tube operates on D.C. supply
C.  when supply frequency is low
D.  to reduce radio interference

Ans. B

Q16. Colour of light depends upon

A.  frequency
B.  wave length
C.  both (a) and (b)
D.  speed of light

Ans. C

ONLINE MCQ EE-ILLUMINATION 2

Q18. For the same power output

A.  high voltage rated lamps will be more sturdy
B.  low voltage rated lamps will be more sturdy
C.  both low and high voltage rated lamps will be equally sturdy

Ans. B

Q19. In the fluorescent tube circuit the func­tion of choke is primarily to

A.  reduce the flicker
B.  minimize the starting surge
C.  initiate the arc and stabilize it
D.  reduce the starting current

Ans. C

Q20. In case of ____ least illumination level is required.

A.   skilled bench work
B.  drawing offices
C.   hospital wards
D.  fine machine work

Ans. C

ONLINE MCQ EE-ILLUMINATION 2