26 Cogeneration is also known as
(A) fuel switching
(B) combined heat and power
(C) coterminal power generation
(D) combined source generation
27 The biofuel which produces the most greenhouse gas emissions comes from
(A) corn
(B) sugarcane
(C) canola
(D) switchgrass
28 The primary reason hydrogen cars have not replaced gasoline-driven cars is
(A) producing hydrogen has not yet been perfected
(B) hydrogen is too explosive
(C) hydrogen is difficult to store
(D) hydrogen must first be converted to petroleum
29 Phantom power refers to
(A) voltage drop in transmission lines
(B) energy consumed by devices when they are turned off
(C) current that crosses between two legs of a circuit
(D) increased cost of power during peak-load periods
30 An ESCO is
(A) a brand of logic controller used in green buildings
(B) an electronic systems controller
(C) a networked smart grid system
(D) an energy services company