Materials And Constructions Mcqs
Q.1: Containers made of high silicon cast iron (14% Si) are not suitable for the storage of ____________________?l
A. Acetic acid
B. Benzoic & boric acids
C. Phosphoric acid (95%) & sulphuric acid (95%),
D. Hydrochloric acid (concentrated)
Q.2: Alinco, which is a aluminium-cobalt-nickel steel, is used for making __________________?X
A. Surgical instruments
B. Powerful magnets
C. Chemical equipments
D. Boiler tubes
Q.3: Which of the following comprises of hydrocarbons ?2
A. Mica flakes
B. Glass
C. Rubber
D. None of these
Q.4: The softest material just next to talc in the Mhos scale is___________________?R
A. Quartz
B. Gypsum
C. Feldspar
D. Fluorite
Q.5: Age hardening of duralumin is due to____________________??
A. Copper
B. Magnesium
C. Both &
D. Neither nor
Q.6: In cold working of metal as compared to its hot working____________________?L
A. Cracks and blow holes are eliminated$
B. Ductility and impact strength improves&
C. Appreciable strain hardening is produced(
D. Yield stress, hardness and fatigue strength is not at all affectedB
Q.7: Spark plugs are made of______________________?.
A. High alumina ceramic
B. Metallic carbides
C. Corundum
D. Carborundum
Q.8: The crystal structure of most of the common metals is_____________________?K
A. Orthorhombic
B. Cubic
C. Hexagonal
D. None of these
Q.9: Lead pipe is_____________________?"
A. Especially resistant to solutions containing H2SO42
B. Usually joined by burning (e.g. by melting to adjacent pieces with a torch)K
C. Having very low elastic limit resulting in permanent deformation from either mechanical orZ
D. thermal strain
Q.10: Cast iron is having very high ___________________?2
A. Proximity between its elastic limit and ultimate breaking strengthB
B. Ductility
C. Tensile strength
D. All , and

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