Equipment II Correct! Incorrect! 1. A process under vacuum reduces the cost of heating and cooling. True False View the lesson section again Correct! Incorrect! 2. A(n) __________ is a mechanical device which increases the pressure of a gas by forcing it into a smaller volume. actuator pump compressor View the lesson section again Correct! Incorrect! 3. The __________ turns within a centrifugal pump to transfer energy to a fluid. volute impeller propeller View the lesson section again