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Multiple Choice Question (MCQ) of Illumination page-11


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101. The sensors in the eye are known as

A) rods and cones
B) wires and nerves
C) retina and antenna
D) high and low.

Ans : (A)


102. The lens of the eye to focuses an image on the

A) calorie
B) retina
C) corona
D) membrane.

Ans : (B)


103. Sodium lamps are used for

A) reading rooms
B) street lights
C) auditorium
D) libraries.

Ans : (D)


104. The colour of sodium lamp is

A) white
B) red
C) yellow
D) blue.

Ans : (C)


105. In electric discharge lamps for stabilizing the arc

A) a reactive choke is connected in series with supply
B) a variable resistor is connected in the circuit
C) a condenser is connected in series to supply
D) a condenser is connected in parallel to supply.

Ans : (B)


106. Heat from light sources is particularly of importance while

A) designing for illumination level
B) designing for floor space utilization
C) designing for air conditioning
D) all of the above.

Ans : (C)


107. Which of the following is difficult to adopt for dimming ?

A) Fluorescent lamps
B) Cold cathode lamps
C) GLS lamps
D) All of the above.

Ans : (A)


108. Leak transformer in sodium lamps initially provides

A) low voltage
B) high voltage
C) high current
D) none of the above.

Ans : (B)


109. A leak transformer is provided with

A) frosted GLS lamps
B) high wattage GLS lamp
C) fluorescent lamps
D) sodium lamps.

Ans : (D)


110. The ignition voltage for sodium lamps is

A) 400 to 600 volts
B) 400 to 440 volts
C) 200 to 220 volts
D) 100 to 150 volts.

Ans : (A)



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