An advantage of the use of DC brakes for shunt-wound operation is ____.
a. little AC chatter
b. laminated magnets are used
c. short armature movement
d. armature is cast of iron
c. short armature movement
You might also like to view...
In determining the fire-resistance rating of an assembly through ASTM E119 test, which of the following properties of the assembly are investigated?
A) Occurrence of cracks in assembly during the fire B) Change of color of assembly during the fire C) Structural integrity during the fire D) (a) and (b) E) (a) and (c)
What type of piping material must not be used if the hydronic system contains a glycol-based anti-freeze solution?
a. Galvanized pipe b. Copper tubing c. PVC pipe d. Stainless steel pipe
The primary function of an access control system is to ______.
A. Protect valuables B. Limit access to a desired location C. Secure the perimeter D. All the above
Grit chambers are used to
a. digest organic solids in sewage sludge b. reduce primary wastewater effluent BOD levels c. remove suspended solids that may damage equipment d. remove colloidal solids that cannot be removed by sedimentation e. none of the above