In a cycle, the spark lasts roughly for ________?

To avoid an interruption in the flow of a syphon, an air vessel is provided________?

The leaks in a refrigeration system using Freon are detected by________?

Scavenging air is supplied to a two-stroke engine at a density greater than that of atmosphere. This means the engine is________?

Expanding steam to a very low pressure (high vacuum) in steam engines is ________?

Clapeyron equation is applicable for registration at________?