Driving slowly brings the engine to operating temperature more quickly, with less air pollution.

Operating temperature: -40 to +60 C (-40 to +140 F)

The printer ontains melted wax when at operating temperature, and owners' manuals warn that it cannot be moved until it has completed a special cool-down cycle selected from the machine's control panel.

Operating temperature (For example, sleeve bearings are suitable to 250 F/121.1 C; ball bearings to 550 F/287.8 C)

Because radiators (typical life 100,000 miles), generally have only just sufficient cooling capacity when new, in order to help get the engine to operating temperature quickly, silting causes significant problems.

The product properties depend on reaction mixture composition, pH of the system, operating temperature, pre-reaction 'seeding' time, reaction time as well as the templates used.

Operating temperature: 0 to 70 degrees C (most models); 40 to 85 degrees C (some models)

Coal consumption was 24 hundredweight (1,200 kg) per day; the engine was in use for only six hours a day, but the boiler was kept at operating temperature continuously.

Conversely, the powerplant units had to be preheated to nearly operating temperature before fireup.

Each rev indicator was hovering steadily at 2400 and the coolant had already reached operating temperature.