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Old 08-08-2016, 08:09 PM   #1
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Default Tom Henry Journeyman Practice Question

I was working through my Tom Henry book tonight and doing one of the journeyman practice exams (I'm taking the test tomorrow.) And am wondering if I'm missing something.
Question #8 is asking for the MAXIMUM demand on twenty eight 8kw ranges in an apartment complex. Looking at table 250.55 column C gives me 43kw for the 28 ranges. But column B goes up to 8.75kw. The demand factor in column B for 28 ranges is 24%.
28 8kw = 224kw 24% = 53.76kw.

Am I reading something wrong? When asking for the MAXIMUM demand what exactly are they looking for?
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Old 08-08-2016, 09:02 PM   #2
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In the table title says that you are supposed to use column C from the table for all cases except as otherwise permitted in note 3.
For column B or C you have to use the nameplate ratings and apply the demand factor.
I don't think that the question gives you this information.



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Old 08-09-2016, 02:37 PM   #3
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In the table title says that you are supposed to use column C from the table for all cases except as otherwise permitted in note 3.
For column B or C you have to use the nameplate ratings and apply the demand factor.
I don't think that the question gives you this information.



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But since we're dealing with 8kw appliances we meet the criteria for column B (3.5kw through 8.75kw) and would apply the demand factor of 24%, right?
That shouldn't change because it's an apartment complex; those are still classified as dwelling units.
The answer key for that particular exam was kinda funky anyways giving mixed answers (saying C when it really meant D and stuff like that.)

My only thought would be what do they mean by the "maximum demand" on these 28 ranges? A demand factor is an adjustment, so are they actually looking for the largest adjustment to the demand, which would be the smaller draw on the service? Or did they straight up want the maximum demand (must amps possible) on the service?
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Old 08-10-2016, 08:19 PM   #4
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I'm sorry I missed your reply, how was the test did you pass?


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Old 08-11-2016, 04:25 PM   #5
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Feeling pretty good about. My fire marshals office is just now switching to doing anything online, so it'll be a few weeks before i get my score back.
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Old 09-02-2016, 06:01 PM   #6
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Ended up passing with a 98%. Sweet.
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Old 09-02-2016, 06:11 PM   #7
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Congrats. Glad to see you studied to blow the test out of the water.
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Old 09-02-2016, 06:45 PM   #8
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Congratulations dude!!!! Very happy for you!
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Old 09-02-2016, 07:32 PM   #9
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Ended up passing with a 98%. Sweet.
Outstanding job bro, congrats!
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Old 09-03-2016, 09:18 AM   #10
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You probably would have done better if you just applied yourself a little more.





Thanx for the update. Congrats!
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Old 09-03-2016, 10:30 AM   #11
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You probably would have done better if you just applied yourself a little more.





Thanx for the update. Congrats!
I know.... -_- i still haven't been able to tell my father. He'd be so disappointed in me.
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Old 09-03-2016, 10:31 AM   #12
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Hahahahaahha Ralph.
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Old 09-04-2016, 03:37 PM   #13
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Good to see you put the effort in and it paid off.
Congrats.
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Old 09-05-2016, 12:42 AM   #14
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I know.... -_- i still haven't been able to tell my father. He'd be so disappointed in me.
But your mom should have your back at anything over a 90, so no sweat.
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