271. The percentage O2 by Weight in atmospheric air is____________?

By Admin / September 7, 2025

A. 18%

B. 23%

C. 77%

D. 79%

✅ The correct answer is option B.

1333. What refers to the need, want or desire for a product backed by the money to purchase it ?

1335. A leading shoe manufacturer produces a pair of Lebron James signature shoes at a labor cost of P 900.00 a pair and a material cost of P 800.00 a pair. The fixed charges on the business are P 5,000,000 a month and the variable costs are P 400.00 a pair. Royalty to Lebron James is P 1,000 per pair of shoes sold. If the shoes sell at P 5,000 a pair, how many pairs must be produced each month for the manufacturer to break-even ?

1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin

2. Transformer cores are normally made from

Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin

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