7. A mud wall containing hay can be considered as an example of which of the fol

Question

7. A mud wall containing hay can be considered as an example of which of the following families of materials?: (a) Hybrids (b) Ceramics (c) Polymers (d) Rubbers (e) Metals 8. Corrosion failure of a metallic material can be prevented by which of the following methods: (a) electroplating (b) painting (c) cathodic protection (d) sacrificial anode (e) all of the above 9. The fracture strength of glass may be determined using: (a) Tensile test (b) Three-point bend test (c) Creep test (d) Impact test (c) Fatigue test 10. Brittle failure occurs under conditions of: (a) Low operating temperature (b) Impact loading (c) Presence of material defects or notches (d) High hardness (e) All of above Ct)

Explanation / Answer

7. mud wall with hay acts as a fiber reinforced polymers

8.corrsion of a metal can be prevented by using electroplating process as in this process electric current is used to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode.

9.An impact test is used to determine at what load the glass will fracture.

10.Here all options are correct because keeping the temperature low will increase the hardness , and increase in hardness have good chances of brittle failure. When there are notches or material defects there will be stress concentration at that location, so even a small load can impact that location to brittle failure.

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