The upper limit of human hearing is normally considered to be about:

Related MCQs

• Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approximately:
• During immersion testing of pipe or tubing the incident longitudinal wave angle must be limited to a narrow range. The reason for the upper limit is:
• What amount of time is normally considered necessary for dark adaption of the eyes prior to performing a fluorescent penetrant test?
• Which of the following is normally considered acceptable practice?
• A lethal dose of complete body radiation is normally considered to be:
• A wheel transducer is normally considered:
• When adding water to a penetrant, the water tolerance limit is indicated when:
• According to ASTM E709-95 the viscosity limit (measured in centi Stokes) of the wet medium (conditioned water) should not exceed:
• Which of the following chemical elements are normally held to a minimum in liquid penetrant materials, when testing stainless steel and titanium?
• Which of the following chemical elements are normally held to a minimum in liquid penetrant materials when testing nickel based alloys?