MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Collodion is a mixture of cellulose nitrate with ____________ |
| A. | Alcohol |
| B. | Ketone |
| C. | Carboxylic acid |
| D. | Phenol |
| Answer» B. Ketone | |
| 2. |
Emulsion adhesives are based on ____________ |
| A. | Polyurethane |
| B. | Collodion |
| C. | Urea-formaldehyde |
| D. | Polyvinyl acetate |
| Answer» E. | |
| 3. |
Epoxies are used in wide diversity of applications because of their strength, durability and great versatility. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The epoxy resins are the _______________ products of epichlorohydrin and bisphenol. |
| A. | Free radical |
| B. | Addition |
| C. | Ion-exchange |
| D. | Condensation |
| Answer» E. | |
| 5. |
Which of the following adhesive is prone to brittle failure? |
| A. | Acrylic polyester |
| B. | PF resin |
| C. | UF resin |
| D. | Epoxy |
| Answer» C. UF resin | |
| 6. |
Which of the following is not an example of thermosetting synthetic resins? |
| A. | Epoxy |
| B. | Acrylic polyester |
| C. | Cellulose derivatives |
| D. | Silicones |
| Answer» D. Silicones | |
| 7. |
The bond energy of a metallic bond is ____________ |
| A. | 600-1200 kJ/mol |
| B. | 60 kJ/mol |
| C. | 20 kJ/mol |
| D. | 100-350 kJ/mol |
| Answer» E. | |
| 8. |
On increasing the temperature, the strength of adhesive ____________ |
| A. | Remain same |
| B. | Increases |
| C. | Decreases |
| D. | First increases than decreases |
| Answer» D. First increases than decreases | |
| 9. |
Adhesives joints are leak-proof for ____________ |
| A. | Solids only |
| B. | Liquids only |
| C. | Gases only |
| D. | Both liquids and gases |
| Answer» E. | |
| 10. |
Corrosion of metals at the joints is minimized by joining dissimilar metals with adhesives because ____________ |
| A. | Direct metal to metal contact is avoided |
| B. | Adhesive act as a lubricator at the joints |
| C. | Metals are covered with adhesives |
| D. | Adhesives prevent the exposure to environment |
| Answer» B. Adhesive act as a lubricator at the joints | |
| 11. |
The substances which are capable of uniting two other materials together by adhering strongly to the surface of both are called ____________ |
| A. | Organic conducting polymers |
| B. | Biodegradable polymers |
| C. | Adhesives |
| D. | Composites |
| Answer» D. Composites | |