Which are correct comparisons between welded joints and mechanical couplings? Select all that apply.
A) Mechanical couplings can offer flexibility for thermal expansions.
B) Mechanical couplings are more expensive to install.
C) Mechanical couplings are stronger and less prone to leakage.
A) Mechanical couplings can offer flexibility for thermal expansions.
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What component of a heat exchanger are partitions located inside a shell and tube heat exchanger that increase turbulent flow and reduce hot spots?
A) Baffles B) Tube sheet C) Tube bundle D) Spacer rods
A freshly laundered towel should be used:
What will be an ideal response?
What material, used in friction linings, may cause lung damage with repeated exposure?
A) Ceramic fiber B) Asbestos C) Carbon fiber D) Fiberglass
Which of these takes place during regeneration in a diesel particulate filter (DPF)?
A) Soot is being burned. B) The catalytic converter is being purged. C) The oxygen sensor is being cleaned. D) The EGR system is being actively tested.