ACS CP ACS CP Industrial & Process Chemistry

Question 1

The Haber-Bosch process synthesizes ammonia from nitrogen and hydrogen at which typical operating conditions?

Accepted Answer

400–500°C, 150–300 atm, iron catalyst with promoters

Answer

The Haber-Bosch process operates at 400–500°C and 150–300 atm using an iron catalyst with K2O and Al2O3 promoters to achieve commercially viable ammonia yields.

Question 2

In chemical process safety, the 'hierarchy of controls' lists which option as most effective?

Accepted Answer

Engineering controls (substitution or elimination)

Answer

The hierarchy of controls prioritizes elimination and substitution (inherently safer design) as the most effective controls, followed by engineering controls, then administrative controls, with PPE as the last resort.

Question 3

The Contact Process for sulfuric acid production uses which catalyst?

Accepted Answer

Vanadium pentoxide (V2O5)

Answer

The Contact Process uses vanadium pentoxide (V2O5) catalyst to oxidize SO2 to SO3 at 400–600°C, which is then absorbed in concentrated H2SO4 to form oleum.

Question 4

Which industrial process converts heavy petroleum fractions into lighter, more valuable gasoline-range hydrocarbons?

Accepted Answer

Catalytic cracking (FCC)

Answer

Fluid catalytic cracking (FCC) breaks down high-molecular-weight petroleum fractions into lighter hydrocarbons (gasoline, olefins) using zeolite catalysts at high temperatures.

Question 5

HAZOP (Hazard and Operability Study) is a systematic process hazard analysis technique that examines:

Accepted Answer

Deviations from design intent using guide words like 'more of,' 'less of,' and 'reverse'

Answer

HAZOP uses structured guide words (More, Less, No, Reverse, Other than, As well as, Part of) applied to process parameters to systematically identify hazards and operability problems.

(ACS CP) American Chemical Society (ACS) Certified Professional Practice Test

(ACS CP) American Chemical Society (ACS) Certified Professional Practice Test

ACS CP ACS CP Industrial & Process Chemistry