What does a certification done by the Canadian Standards Association (CSA) signify?
A) The equipment meets ANSI, UL, CSA America, or NSF standards.
B) The furnace meets only Canadian standards.
C) The appliance fails to meet U.S. standards.
D) The equipment meets CSA and CSA America standards.
A
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Silicon is widely used as a semiconductor because it _____.
a. has no valence electrons b. only has one valence electron c. has a negative charge d. withstands heat
Define "bimetal strip."
What will be an ideal response?
Which one of the following was NOT among Wilson's Fourteen Points, upon which he based America's idealistic foreign policy in World War I?
A. reduction of armaments B. an international guarantee of freedom of religion C. abolition of secret treaties D. an international organization to guarantee collective security E. The principle of national self-determination for subject peoples
Answer the following statement(s) true (T) or false (F)
1. The magnetic switch is called a motor starter if it has overload protection. 2. Referring to the various types of rotor construction and associated code letters, code letter A has high starting torque and relatively low starting current. 3. The National Electrical Code® requires the use of two overload units as running-overload protection Table 430.37. 4. In the case of 125% or 115% overload thermal protection, the Code does allow the electrical personnel to increase the ratings if the original selection does not allow the motor to operate. 5. To reverse the direction of rotation of three-phase motors, interchange any three of the four line lead connections to the motor terminals.