Question 1

How many watts is 1 horsepower?

Accepted Answer

1 mechanical horsepower equals approximately 745.7 watts.

Question 2

What is the difference between kW and kWh?

Accepted Answer

kW (kilowatt) measures power (rate of energy use), while kWh (kilowatt-hour) measures energy (total amount used over time).

Question 3

What is a refrigeration ton (RT)?

Accepted Answer

A refrigeration ton equals 12,000 BTU/h or approximately 3,517 watts. It originates from the cooling power needed to melt one short ton (2,000 lb) of ice in 24 hours. It is used primarily in HVAC and air conditioning.

Question 4

What are the different types of horsepower?

Accepted Answer

Mechanical HP = 745.7 W (based on steam engine tests). Electrical HP = 746 W (used for electric motors). Metric HP (PS) = 735.5 W (75 kgf·m/s, used in Europe and Asia for automotive power).

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