The number of semester credit hours required for an associate degree depends on the college and degree program. In general, an associate degree takes two years full time and represents half the work required for a bachelor's degree.
A dekatherm (dth) is a unit of energy used primarily to measure natural gas, developed in about 1972 by the Texas Eastern Transmission Corporation, a natural gas pipeline company. It is equal to 10 therms or 1,000,000 British thermal units (MMBtu).
Gas Generator. a device for the thermal processing of solid or liquid fuels into combustible gases; the process is carried out in the presence of air, free oxygen, or bound oxygen (water vapor). The gases produced in a gas generator are called generator gases.