Chemistry Industrial Chemistry PMDC Conceptual Practice
PMDC Verified Question 10 of 41
Which statement accurately describes the primary operational objective of an adhesive in structural applications?
A
To chemically degrade the surface layer of substrates
B
To join two solid surfaces through surface adhesion forces
C
To increase the internal porosity of metallic components
D
To serve as a sacrificial lubricant between dynamic interfaces
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: To join two solid surfaces through surface adhesion forces
Concept:

The primary function of an adhesive is to bond two or more solid parts into a cohesive assembly capable of transferring stress without joint failure.

Formula / Reaction:

Qualitative concept / No formula required.

Solution:

  • Adhesives establish intermolecular bonds across the interface, distributing mechanical stress over the entire joint contact area.


Why other options are incorrect:

  • Option A: Adhesives must preserve substrate integrity, not degrade it.


  • Option C: Adhesives fill voids and seal pores rather than creating porosity.


  • Option D: Lubricants reduce friction to facilitate movement, opposite to the binding action of adhesives.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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