Answer the following statement(s) true (T) or false (F)
1. The division line between hazardous and non-hazardous may be a physical barrier, or it may simply be a distance limit.
2. A Division 1 area is one in which, under normal operating conditions, a hazardous material is present in dangerous quantities only because of accidental spills or other unusual circumstances.
3. Class I locations are characterized by flammable flyings and fibers.
4. As a result of major changes to the 2011 Code, equipment marking designations for protection may be a prefix or suffix letter to indicate D for dust, G for gas, and M for mining.
5. An area is considered hazardous because of the highly flammable nature of a vapor, gas, dust, or solid material that may be easily ignited to cause fire or an explosion.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. TRUE
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French aid to the colonies did all of the following EXCEPT
A. greatly aided America's struggle for independence. B. was motivated by what the French considered to be their own national interests. C. forced the British to change their military strategy in America. D. helped them protect their own West Indies islands. E. allowed American forces to focus only on the southern theater.
What does "sustainable horticulture" mean?
What will be an ideal response?
A tanker truck carrying liquid herbicide overturned and caused a spill over a field. The liquid herbicide remained on the soil for 30 min before evaporating into the air. The mass diffusivity of the liquid herbicide in the soil is 2 × 10?8 m2/s. If a concentration of 0.1 percent by weight will destroy most life, determine the depth of the soil at which plant and insect life is likely to be affected by the spill.
What will be an ideal response?
In an AC inductive circuit:
A) Current leads voltage. B) Voltage leads current. C) The voltage and current are in phase. D) Voltage lags current.