Question

What are the releasing agents of moldcast
(A) Polyester resin
(B) Liquid detergent
(C) Oil
(D) Slip
(E) Resin
Choose the correct answer from the options given below:

• A. (A) and (B) only
• B. (B) and (E) only
• C. (A), (E) and (C) only
• D. (B), (C) and (D) only

Hint:

A releasing agent is anything that creates a barrier between the mold and the casting. Think of it like greasing a cake pan: common household items like soap or oil often work.

Answer 1

The Correct Option is B

Step 1: Define a "releasing agent." A releasing agent (or mold release) prevents casting material from sticking to a mold, allowing for easy removal.
Step 2: Assess the options as releasing agents.

(A) Polyester resin & (E) Resin: These are casting materials, not releasing agents. They are poured into the mold.
(B) Liquid detergent: Diluted liquid soap is a common releasing agent for plaster casting.
(C) Oil: Various oils (petroleum jelly, mineral oil, or specialized mold release oils) are widely used as releasing agents.
(D) Slip: Liquid clay used in ceramics for joining or decoration; not a general mold release.

Step 3: Determine the correct agents. The actual releasing agents are (B) Liquid detergent and (C) Oil. Since no option contains only (B) and (C), the question's choices are flawed.