3B2 Power Engineer Exam Practice Questions With Complete Solutions

3B2 Power Engineer Exam Practice Questions With Complete Solutions The disadvantages of a gas turbine are: 1. High cost of manufacture 2. High levels of noise pollution are produced 3. Low thermal efficiency 4. Requires many auxiliaries to be efficient A. 1, 2, 3 B. 1, 3, 4 C. 2, 3, 4 D. 1, 2, 4 E. 1, 2, 3, 4 - ANS E The most common process method of refrigeration is: Select one: A. Absorption B. Lithium bromide C. Water vapor D. Vapor compression or mechanical E. Ammonia compression system - ANS D To facilitate the removal of moisture and oil from the compressed air, a/an _____ is installed. Select one: A. Intercooler B. Oil separator C. Unloader D. Expansion tank E. Aftercooler - ANS E In a two-stage refrigeration system, the 1st stage compressor is also known as a _____ compressor. Select one: A. Booster B. Standby C. Low volume D. Extraction E. Refrigerant - ANS A In the rotary vane compressor: Select one: A. Vanes close to the central hub by centrifugal force