ASNT Level II Study Guide Questions With Correct Answers.

ASNT Level II Study Guide Questions With Correct Answers. 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 enhance desired characteristics Battery drain, coated chips, and high light intensities are all considerations when using LED sources When inspecting a reflective surface, glare from the surface