Which types of oil feed system are generally self-purging?
A) one pipe oil feed systems
B) two pipe oil feed systems
C) both one and two pipe systems are self purging
D) both one and two pipe systems require manual purging
B
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¿Cuál es una de las superficies con temperatura más elevada de las calderas?
a. Los tambores de vapor b. La descarga de gas de combustión c. La esquina de bajada d. El piso de la caldera
__________________gears are used extensively in the differential where they transfer torqueat right angles to the drive axles.
Fill in the blank(s) with the appropriate word(s).
Technician A says that a pressure check valve should hold system pressure for at least five minutes after the pump is shut off. Technician B says that a defective check valve could cause long cranking time. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Sheet metal screws are also known as ________
A) Machine screws B) Self tapping screws C) Hardened screws D) None of these