ASNT Level II Study Guide with complete solution.

ASNT Level II Study Guide with complete solution. In a normal, healthy eye, the incoming light is focused on the - retina The component of the eye that responds to light intensity and gives the eye its color is the - iris If the focal point of the light entering the eye falls in front of the retina, the result is - myopia (neat-sightedness) During direct visual inspection, viewing distance shall not be any more than - 24 in or 610 mm Which of the following are visual examination methods - direct and indirect Visible light is one of the radiation types graphically represented on the - electromagnetic spectrum To successfully locate anomalies the inspector must - use sufficient lighting Visible light perceived by the eye is in the wavelength range of - 380-770 nanometers Visible light travels in a straight line until it is - reflected, refracted, or diffracted A photometer used by inspectors - converts radiant energy of light into measurable electrical signal A lumen is defined as - equal to 1 fc falling on 1 ft2 of area Luminous intensity - is inversely proportional to the square of the distance from the source What provides more visible light per unit of electric power consumed - High-intensity discharge lights When examining objects of substantial size - a scanning plan should be formed and followed When is the surface condition of a part an important factor during visual testing - Poor surface condition could mask discontinuities How can glare be reduced during inspection of a part - Dimming the light source Environmental factors that affect visual inspection includes - atmosphere and cleanliness To improve the detection of visual discontinuities on colored objects - select the optimal color of lighting to enhanc