Pick the item that does not belong with the other three.

Exercise and reference answers

Questions

1. Items

   1. C3S
   2. CaCl2
   3. C2S
   4. C3A

   Reason

   C3S, C2S and C3A are Bogue's cement compounds. CaCl₂ is a setting accelerator, not a clinker compound.

   Odd item

   CaCl2

2. Items

   1. Slump cone
   2. Vee-Bee
   3. Schmidt hammer
   4. Compacting factor

   Reason

   Slump, Vee-Bee and compacting factor measure fresh-concrete workability. Schmidt hammer measures hardened-concrete surface hardness.

   Odd item

   Schmidt hammer

3. Items

   1. Pumice
   2. Vermiculite
   3. Perlite
   4. Barite

   Reason

   Pumice, vermiculite and perlite are light-weight aggregates. Barite is a high-density aggregate for radiation shielding.

   Odd item

   Barite

Explanation