Sentence examples for difficult to ignite from inspiring English sources
When properly stored, ammonium nitrate is difficult to ignite.
Although anthracites are difficult to ignite, they burn with a pale blue flame and require little attention to sustain combustion.
Ammonium nitrate, which is commonly used as a fertilizer, is difficult to ignite if handled carefully and properly stored, but it has also been used in a number of terrorist attacks, including the 1995 Oklahoma City bombing.
The Federal Aviation Administration in 2004 declared the work of Scaled Composites at the Mojave airport "benign to the public," and the motor was declared "not explosive" and "extremely difficult to ignite accidentally".
Grass can lead small blazes toward bigger fuel, such as trees that are more difficult to ignite without a persistent source around it.
Fuel oil itself is very difficult to ignite, but its hydrocarbon vapors are explosive when mixed with air in certain concentrations.
Gunpowder was difficult and dangerous to ignite at sea so, using pyrotechnic technology, Coston found a way that the flares could be hand-held and incorporate an ingenious self-igniting device.
High winds can also make it difficult for crews to ignite floating oil.
For hydrocarbon fuels with large Lewis number, the lean spray flame is much more difficult to be ignited compare to the equivalent purely gaseous flame.
Japan's experience demonstrates how difficult it may be for traditional policies to ignite recovery after a bubble.
