Light Noise Radiation

Which light factor prevents discomfort caused by excessive contrast?

• Uniform distribution

• Steadiness

• Absence of glare

• Colour temperature

The SI unit of absorbed radiation dose is

• Rad

• Roentgen

• Sievert

• Gray

Which type of radiation has the least penetrating ability?

• X-rays
• Alpha particles
• Gamma rays
• Beta particles

The term ‘noise pollution’ is best defined as:

• Loud sounds in a factory

• Unwanted sound at the wrong place and time

• Music played at a party

• Industrial vibrations

Which radiation protection device shows accumulated exposure to X-rays?

• Dosimeter
• Luxmeter

• Lead apron
• Radiation badge

Which system of artificial lighting causes the sharpest shadows?

• Indirect lighting

• Semi-indirect lighting

• Incandescent light

• Direct lighting

The unit “Candela” measures which quantity of light?

• Luminous intensity

• Luminous flux

• Illumination

• Luminance

Which type of noise measurement takes into account both intensity and frequency?

• dB (A)

• Lumen

• Phon

• Roentgen

What is the typical sound level of normal conversation?

• 20 - 25dB

• 60-65 dB

• 100 dB

• 50 dB

Which is a typical permissible occupational exposure dose for radiation per year?

• 50 rad

• 5 rad

• 0. 0.50 rad

• 15 rad