Exam (elaborations)
559 Journeyman Mechanical Exam 100% Solved
- Course
- Institution
559 Journeyman Mechanical Exam 100% Solved
[Show more]
Content preview
559 Journeyman Mechanical Exam 100% SolvedWhen making piping bends and change of direction in a metallic gas pipe system, the pipe shall
not be bent thru an arc of more than _____ degrees. Correct Ans-90 degrees - 2015 IFGC
409.5.1
Underground gas piping shall be installed a minimum depth of _____ inches below grade unless
serving an individual outside lights, grill or other appliance, which shall be permitted to be
installed a minimum of ______ inches below grade. Correct Ans-12, 8 - 2015 IFGC 404.12,
404.12.1
In testing a natural gas line to an appliance in a residence, the test pressure to be used shall not
be less than ______ times the maximum working pressure, but not less than _____
psig. Correct Ans-1 ½, 3 - 2015 IFGC 406.4.1
Copper and brass piping shall not be used in a natural gas piping system where the gas contains
______ than an average of _____ grains of hydrogen sulfide per 100 standard cubic feet of
gas. Correct Ans-more, .3 - 2015 IFGC 406.4.1
Copper and brass piping shall comply with Standard Type K or L of ASTM B 88 or ASTM B
280. Correct Ans-True - 2015 IFGC 403.5.2
The volumetric flow rate of gas to be provided shall be the sum of the maximum input of the
appliances served. Correct Ans-True - 2015 IFGC 402.2
The maximum design operating pressure for a natural gas piping system located inside a
building shall not exceed 5 pounds psig. Correct Ans-True - 2015 IFGC 402.6
A horizontal steel gas pipe, one inch in diameter, is required to be supported a maximum of
every _____ feet. Correct Ans-8 - 2015 IFGC 415.1 and table 415.1
, What is the minimum size (nominal inch) supply line (from the outlet side of the meter to the
appliance interconnection point) that would be required for a schedule 40 metallic supplying 2
furnaces, 135,000 BTU/h each located 50 feet from the gas meter? The fuel is natural gas,
supplied with an inlet pressure of less than 2 psi; a pressure drop of .5, a specific gravity of 0.60
and supply rate of 1,000 cfh. Correct Ans-1" (270,000 BTU/h, locate on correct table given gas
criteria) - 2015 IFGC 402.4 and Table 402.4(2)
Oxygen is an approved test medium to pressure test a gas line? Correct Ans-False - 2015 IFGC
406.2
What is the largest BTU input rated appliance that can be installed in a mechanical room that
measures 10' x 10' x 8' Correct Ans-16,000 BTUS (1,000 BTU per 50 cubic feet) - 2015 IFGC
304.51
How many amps can a 40va, 120v transformer with a 24v secondary carry? Correct Ans-1.7A
(40va/24v) - OHM'S LAW
______________ motors driving exhaust fans shall not be placed inside booths and
ducts. Correct Ans-Electric - 2015 IMC 502.7.3.6
A 14-inch gas vent protruding through a roof and located within 8 feet of a vertical wall must
terminate not less than ________ feet above highest point it passes through the roof. Correct
Ans-2 feet - 2015 IFGC 503.6.4
The maximum vent connector length of an 8" diameter connector is _______ feet. Correct
Ans-12 - 2015 IFGC Table 504.3.2
What size steel gas pipe is required to supply a branch line 50 foot long for a 185,000 BTU gas
fired furnace? (assume natural gas is at 1,000 BTUs per cubic foot, .5 in. water column pressure
drop, pressure less than 2 psi and a specific gravity of .60) Correct Ans-A: 1" - 2015 IFGC Table
402.4(2)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TheeGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now