101 Basic Series - Module 12 - CEU Education Your final score on this exam will be emailed to you for your records. First name:   Last name:   Company name:   E-Mail Address   City   State   NO STATEALAKASAZARCACOCTDEDCFMFLGAGUHIIDILINIAKSKYLAMEMHMDMAMIMNMSMOMTNENVNHNJNMNYNCNDMPOHOKORPAPRPWRISCSDTNTXUTVTVIVAWAWVWIWY Province (Optional)   Country (Optional)   1 The measurement of distance between the contacts when an arc is extinguished is called the __________ distance. Short Arc Breach Break 2 Double Throw safety switch is used to manually switch from one load circuit to another. True False 3 A switch with no fuses is referred to as a ____________ safety switch. Fusible Fused No Fuse Non-Fusible 4 A safety switch can be open style without an enclosure. True False 5 Typical applications for Heavy Duty safety switches might include: Turning on/off power to motors Disconnecting a plant area or assembly line Controlling power to remote locations Repeated basis manual operations All of the above 6 Typical applications for General Duty safety switches might include: Residential Service Entrance Outdoor Shut-Off for Air Conditioning Temporary Service at Construction Site Outbuilding Sub-Feed All of the Above 7 During a short circuit, a fuse can cut off the circuit in less than ___________. Quarter of a Cycle Half a Cycle One Cycle Two Cycles 8 Dual horsepower rating refers to the safety switch's standard HP and maximum HP ratings. True False 9 Which NEMA type enclosure is best suited for indoor use where non-corrosive liquids drip, dirt falls, or dust blows around? NEMA type 1 NEMA type 3R NEMA type 4 NEMA type 4X NEMA type 12 10 The standard HP rating is used with non-time delay fuses, and the maximum HP rating is applied with time delay fuses. True False 11 An air conditioner disconnect has a pullout block to make/break the circuit instead of a handle mechanism. True False 12 A safety switch is a device used to open and/or close a circuit. This may be done manually with a ___________ and automatically with __________. (Select two answers) Circuit Breaker Operating Mechanism Fuses Pushbutton 13 Heat is a major cause of wire insulation failure and can cause serious short circuits. True False 14 The proper definition for a fuse's inverse time current characteristic is: Higher the over current, longer the time required for the fuse element to melt Longer the time required for the fuse element to melt, higher the over current Higher the over current, shorter the time required for the fuse element to melt Shorter the time required for the fuse element to melt, lower the over current 15 The two common classifications of safety switches are: Residential Duty General Duty Heavy Duty Industrial Duty 16 The fuse's continuous current carrying rating is referred to as its _______________. Ampere Rating Voltage Rating Interrupt Rating Let-through Rating 17 The amount of time required for the fuse element to melt from the overcurrent and open the circuit is called the _________. Clearing time Melting time Closing time Disconnect time 18 In most cases, the ampere rating of a fuse should not exceed the current carrying capability of the circuit. True False 19 A  two-pole, 2-wire safety switch has ____ "hot" wire(s), while a one-pole, 2-wire safety switch has _____"hot" wire(s). One, One Two, Two Two, One None of the above 20 Six-Pole safety switches are used to manually switch from one power source to another. True False

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