CPT Heat Transfer & Thermodynamics Flashcards
6 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPT Heat Transfer & Thermodynamics flashcards as text
What does 'superheat' mean in steam system terminology?
Answer: Steam heated above the saturation temperature at the same pressure
Superheated steam is dry steam heated beyond its saturation temperature at a given pressure, giving it higher enthalpy and preventing condensation in distribution lines.
A process cooler is failing to reduce product temperature to specification. Which corrective action should be investigated first?
Answer: Check cooling water flow rate, inlet temperature, and heat exchanger fouling
Insufficient cooling duty most often results from reduced cooling water flow, elevated cooling water inlet temperature, or fouled heat transfer surfaces — all addressable before equipment replacement.
The Second Law of Thermodynamics states that heat naturally flows:
Answer: From hot to cold bodies spontaneously
The Second Law establishes that heat spontaneously transfers from higher-temperature regions to lower-temperature regions; reversing this direction requires external work input.
What is the purpose of thermal insulation on process piping and equipment?
Answer: Reduce heat loss or gain, maintaining process temperature and improving energy efficiency
Insulation minimizes unintended heat exchange between process fluids and the environment, reducing energy costs, maintaining process temperatures, and protecting personnel from hot surfaces.
Which type of thermometer is most commonly used for measuring very high process temperatures (above 1,000°F) in industrial plants?
Answer: Thermocouple (Type K or Type S)
Thermocouples, especially Type K (up to ~2,300°F) and Type S (up to ~2,900°F), are the standard for high-temperature industrial measurements due to their wide range and durability.
A process vessel is operating at 250°F and 50 PSI. If pressure is suddenly released to atmospheric, what will immediately occur?
Answer: Flash vaporization will occur as the liquid boils instantly at the lower pressure
Liquid above its atmospheric boiling point will instantly flash to vapor when depressurized, releasing stored thermal energy — this is why controlled depressurization is a critical safety procedure.