Which completes the ITT note #1 phrase: 'a linear variation applies above ______, ten seconds, and ______, two seconds'?

Which completes the ITT note #1 phrase: 'a linear variation applies above ______, ten seconds, and ______, two seconds'?

• A. 870 °C; 980 °C
• B. 755-810 °C; 810 °C max
• C. 860 °C (5 sec)
• D. 870 °C; 980 °C

Answer: (A)

This question is about how the ITT note defines a temperature-dependent time limit using two anchor points on a linear relation. The correct fill sets the anchors at 870 °C for ten seconds and 980 °C for two seconds. With those two points, the rule means that as temperature increases from 870 to 980 °C, the allowable time decreases linearly from 10 seconds to 2 seconds. Beyond 980 °C the behavior follows the same linear trend toward the 2-second limit. The other options don’t pair the temperatures with the specified times or fail to establish both anchors needed for the linear variation, so they don’t match the intended rule.

This question is about how the ITT note defines a temperature-dependent time limit using two anchor points on a linear relation. The correct fill sets the anchors at 870 °C for ten seconds and 980 °C for two seconds. With those two points, the rule means that as temperature increases from 870 to 980 °C, the allowable time decreases linearly from 10 seconds to 2 seconds. Beyond 980 °C the behavior follows the same linear trend toward the 2-second limit. The other options don’t pair the temperatures with the specified times or fail to establish both anchors needed for the linear variation, so they don’t match the intended rule.