Acoustical materials Machine Design Mcqs July 25, 2019 BILAL KHATTAK0 A.Absorb sound B.Reflect sound C.Create sound D.Absorb and reflect sound E.Create and reflect soundRelated Mcqs:Accounstical materialsPorous materials generallyA good selective surface utilizes materials that stronglyA concrete wall generallyNoise is _______________.Refractory metals areLow clouds retard surface cooling at night better than clear skies because_____________?The damping capacity of a material is its capacity toThe phenomenon of materials in which slow extension of materials takes place with the time at constant load is known asSome engineering materials are made up of more than one phase, with different mechanical properties, such materials are known as
