12. 對於潤滑油之補充，一次不宜超過下列何者？(A) 40(%)(B) 30(%)(C) 20(%)(D) 10(%)

3. An adjustment screw permits the valve to be set up for condensate release at a specific temperature. Clearly in an application where the pressure varies there could be a broad band of operation in which the trap would be either waterlogged or passing steam. What type of operated traps is above description? (A) Thermodynamic trap (B) Mechanical trap (C) Thermostatic trap (D) Vacuum trap