RETA CARO STUDYGUIDE JH EXAM
(ACTUAL EXAM) QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST 2024 ALREADY GRADED A+
Inhaling which of these levels of ammonia vapor may cause
sudden death? - ANSWERS-5500 PPM
What concentration of anhydrous ammonia is most likely to
cause skin to blister and burn within a few seconds of contact? -
ANSWERS-30,000 PPM
What happens when pressure on a liquid is increased? -
ANSWERS-Boiling point goes up/Saturation temp. goes up
What happens when vapor is Superheated? - ANSWERS-
Temperature above saturated/it gains sensible heat 0.5x1
degree F
,What causes heat to move from one object to another when
touched? - ANSWERS-temperature difference/ conduction
Which is equal to 22 Psig? - ANSWERS-36.7 Psia
What is the Latent Heat of Vaporization?(H2O) - ANSWERS-970
Btu's
What product requires the most energy to lower 1 lb. by 1
degree? - ANSWERS-water
What Btu's are needed to convert 10 lbs. of water to 10 lbs. of
steam? - ANSWERS-10x970= 9,700 Btu's
What rate describes the load for 120 tons?(in Btu's/Hr.) -
ANSWERS-Btu/hr= 12,000 so 12,000x120=1,440,000
What is equivalent to 48,000 Btu/hr. in tons? - ANSWERS-
48,000 divided by 12,000 = 4 tons
, What is 100 degrees Celsius in Farenheight? - ANSWERS-212
degrees farenheight
figure* Single Stage- Saturation should never occur in? -
ANSWERS-compressor
figure* Single Stage- Where is heat absorbed from the product?
- ANSWERS-Evaporator
What is compressed in refrigerant vapors? - ANSWERS-vapors
What best describes refrigerants boiling rapidly? - ANSWERS-
saturated/ It's evaporating
What is the condensation in a pipe with R-22 at 20Psig & 10
degrees farenheight? - ANSWERS--5 degrees farenheight,
32.8Psig
What is indicated when evaporative condensation liquid drain
is 90 degrees farenheight and 180Psig? - ANSWERS-subcooled 5
degrees, or non-condensables
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