Engineering Chemistry MCQs
Solved MCQs of engineering Chemistry.
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The Corrosion of metals at the joints is minimized by joining dissimilar metals with adhesives due to which of the following?
(A). Â The Metals are always covered with the adhesives
(B). Â The Adhesive always act as the lubricator at the joints
(C). Â The direct contact of metal to metal is avoided
(D). Â Adhesives prevent exposure to an environment
(E). None of these
Multiple Choice Question Answer: Â c
The Adhesives joints are leak-proof for which of the following?
(A). Â Solids only
(B). Â Â Both liquids and gases
(C). Â Gases only
(D). Liquids only
(E). None of these
Multiple Choice Question Answer: Â b
Joining labels to plastic cans or bottles is not possible if we do not use the adhesives.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
If the strength of the adhesive joint is which of the following then the mechanical joint is obtained by welding or riveting?
(A). Â Less
(B). Â More
(C). Â Equals to
(D). Â Very less
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the bond energy of a metallic bond?
(A). Â Â 100-350 kJ/mol
(B). Â 60 kJ/mol
(C). Â 20 kJ/mol
(D). Â 600-1200 kJ/mol
(E). None of these
Multiple Choice Question Answer: Â a
Not an example of thermosetting synthetic resins is _______
(A). Â Epoxy
(B). Â Acrylic polyester
(C). Silicones
(D). Â Cellulose derivatives
(E). None of these
Multiple Choice Question Answer: Â d
The adhesive that is prone to brittle failure is ______
(A). Â Â PF resin
(B). Acrylic polyester
(C). Â UF resin
(D). Â Epoxy
(E). None of these
Multiple Choice Question Answer: Â a
which of the following are the epoxy resins that are the products of epichlorohydrin and bisphenol?
(A). Â Free radical
(B). Â Addition
(C). Â Â Condensation
(D). Â Ion-exchange
(E). None of these
Multiple Choice Question Answer: Â c
On increasing the temperature, what will happen to the strength of the adhesive?
(A). Â Remain same
(B). Â Increases
(C). Â First increases then decrease
(D). Â Decreases
(E). None of these
Multiple Choice Question Answer: Â d
We use the Epoxies in a wide diversity of applications due to their strength, durability, and great versatility.
(A). Â False
(B). Â True
(E). None of these
Multiple Choice Question Answer: Â b
We use _________ as the curtain-wall sealants
(A). Â Silicones
(B). Â Polyurethane
(C). Â Polyvinyls
(D). Â Cellulose derivatives
(E). None of these
Multiple Choice Question Answer: Â a
The Emulsion adhesives are based on which of the following?
(A). Â Polyurethane
(B). Â Polyvinyl acetate
(C). Â Urea-formaldehyde
(D). Â Collodion
(E). None of these
Multiple Choice Question Answer: Â b
The Collodion is a mixture of cellulose nitrate with which of the following?
(A). Â Carboxylic acid
(B). Â Ketone
(C). Alcohol
(D). Â Phenol
(E). None of these
Multiple Choice Question Answer: Â c
What are The substances that are capable of uniting two other materials together by adhering strongly to the surface of both called?
(A). Â Organic conducting polymers
(B). Â Adhesives
(C). Biodegradable polymers
(D). Â Composites
(E). None of these
Multiple Choice Question Answer: Â b
The incorrect statement from the following is _____?
(A). Â Two surfaces are instantly, economically, and easily joined to one another by the adhesives
(B). Â The Bonding that is done by the adhesives gives smoother finished surfaces
(C). Â The Adhesives bonding always require less after-finishing
(D). The process of applying the adhesives requires very much highly specialized workers or the high heat
(E). None of these
Multiple Choice Question Answer: Â d