When installing a refrigeration system, the piping should be connected with as few joints as possible.
Answer the following statement true (T) or false (F)
True
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ASME Standard B30.9 provides guidance for chain slings regarding the minimal thickness at any point on the link, with the measurements based on _____.
a. the steel alloy from which the chain is made
b. the size of the connected hooks or other hardware
c. the nominal size of the chain link
d. the length of the chain sling leg(s)
A developer wants to provide access to a new building from a driveway placed 1000 ft upstream of a busy intersection. He is concerned that queues developing during the red phase of the signal at the intersection will block access. If the speed on the approach averages 35 mi/hr, the density is 50 veh/mi, and the red phase is 20 sec, determine if the driveway will be affected. Assume that the traffic flow has a jam density of 110 veh/mi and can be described by the Greenshields model.
What will be an ideal response?
Some furnaces use two automatic shutoffs that are mechanically in series to provide additional safety. What type of valves are these?
A) diaphragm valves B) redundant valves C) direct-acting valves D) intermittent valves
The vibration in a machine is caused by the ________ of movement at each peak of the vibration cycle
A) increase B) reversal C) cessation D) decrease