QUIZ MRC UNIT 3 PREMIX & PREPREG

What is the process shown in the figure?

• Dough Moulding Compound

• Sheet Molding Compound

• Prepreg

• CSM process

All the below are characteristic of SMC EXCEPT:

• Highly crosslink

• More expensive than metal

• Have unidirectional form (UD)

• Suitable for Compression Molding

A prepreg consists of a combination of a matrix (or resin) and fibre reinforcement.

• Yes

• No

C-Stage material requires cold storage to prevent complete curing.

• Yes

• No

What is the picture shown?

• CSM

• Carbon black

• Unidirectional Prepreg

• Kevlar

What is benefits of Prepregs?

I) Ease of use

II) Control of fibre volume fraction

III) Clean process

IV) High void content

• I and II

• I, II and III

• I, II and IV

• I, II, III and IV

All below is properties of prepreg EXCEPT:

• Volatile-free at normal room temperature.

• Prepreg is covered on both sides by protective coverings

• Leak-free and spillage free.

• Need to mix with wet resin

What type of premix shown in figure?

• Sheet Molding Compound

• Dough Molding Compound

• Prepreg

• Gelcoat mixing

DMC finds large application in items such as electrical parts and housings

• Yes

• No

All below is premix type EXCEPT:

• SMC

• DMC / BMC

• Prepreg

• Wet Layup