Absa 4A Unit 7 Power Mechanics

ABSA 4A UNIT 7 POWER MECHANICS EXAM QUESTIONS WITH CORRECT VERIFIED ANSWERS | 100% PASS (A+ CERTIFIED) (4-049-2.2) When tightening the bolts on a pipe flange: Select one: a. Use a sequential criss-cross method of tightening b. The top bolts must be tightened first c. The gasket should be held in place by gasket glue d. Tighten every second bolt first, then tighten the others Answer a. Use a sequential criss-cross method of tightening (4-049-1.13) All pipe weights with the same nominal pipe size have the same: Select one: a. Mass per metre of length b. Thickness c. Outside diameter d. Inside diameter Answer c. Outside diameter (4-049-3.1) A bellows corrugated expansion joint is suitable for pressures up to approximately _______ kPa: Select one: a. Unlimited b. 500 c. 1000 d. 2000 Answer d. 2000 (4-049-2.13) A Van Stone flange is fitted ___________ on a pipe: Select one: a. With evenly spaced set screws b. Loosely c. By threading coursely d. with tack welds Answer b. Loosely (4-049-1.16) The inside diameter of a pipe is expressed as the: Select one: a. Outside diameter minus the wall thickness b. Formula 2P-M=k c. Nominal pipe size d. pipe size plus wall roughness Answer c. Nominal pipe size (4-049-1.9) The mass of a 2 m length of Schedule 40 pipe, outside diameter 101.6 mm, is: Select one: a. 26.92 kg b. 11.48 kg c. 36.98 kg d. 31.9 kg Answer a. 26.92 kg (4-049-2.5) Which gasket has an oval cross-section? Select one: a. Ring joint b. Cut asbestos c. Flat ring d. Full face Answer a. Ring joint (4-049-1.10) A typical application of forged steel in a power plant is: Select one: a. Ash handling systems b. Superheated steam lines c. Superheated steam lines d. Pipe fittings Answer d. Pipe fittings (4-049-1.1) A common material used for water and instrument air piping in power plants is Select one: a. copper b. galvanized steel c. cast iron d. bronze Answer a. copper