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Questions in engineering

[Jawaban] When producing a hole in concrete or masonry, it is best to use a(n): A. impact driver B. hammer drill C. power screwdriver D. reciprocating saw

[Jawaban] What is the difference between a hermetic and a semi-hermetic compressor? A. A hermetic compressor has all parts enclosed in a welded shell. B. A semi-hermetic compressor has a motor with valves above the cylinders. C. A semi-hermetic compressor has pistons and a crankshaft.

[Jawaban] The basic difference between soldering and brazing is the temperature at which the filler metal flows. True or False

[Jawaban] What is the first step in fire prevention on a construction site? A. Installing fire alarms B. Site inspection C. Training employees D. Contacting the Fire Department

[Jawaban] Safety rules that apply to commercial industrial installations for motor control include the following: I. Never comply with the NEC, state, and local codes. II. Use UL-listed equipment, components, and test equipment. III. Before removing any fuse from a circuit, be sure the switch for the circuit is open or disconnected and properly verify the circuit is de-energized. IV. Always use safety equipment. A. I, II, III, and IV B. I and IV C. II and III D. II, III, and IV

[Jawaban] Select the best answer for the question. Which of the following actions could create a water hammer? A. Quickly closing a valve B. Replacing steel pipes with copper C. Relocating a steam trap D. Venting the expansion tank

[Jawaban] Match the following tools and instruments with their identifying phrases. Tool used to line up holes in mating parts. [Choose] Size-adjustable tool used for bending and gripping. [Choose] Tool with a slight opening in the gripping head. [Choose] Instrument used to measure values around atmospheric pressure. [Choose] Tool used mainly in electrical tasks for cutting and gripping. [Choose] Instrument comprising a collection of meters measuring different electrical variables. [Choose]

[Jawaban] If smoke is present on a wheel end and it appears to increase, the technician should contact emergency services. A. True B. False

[Jawaban] Which device is not considered an arcing device? A. Multimeter B. Circuit Breaker C. Fuses D. Relay Contacts

[Jawaban] Which statement about impact wrenches is true? Impact wrenches: A. Are mainly used on soft joints. B. Typically run on hydraulic power. C. Have a high power-to-weight ratio. D. Maintain speed under various loads.