G2 Exam Prep

G2 Exam Prep
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1. The best tool for adjusting and setting the pressure on Manometer
an appliance regulator:

a.
Manometer

b.
Velometer

c.
Psychrometer

d.
An analyzer

2. 3/8 NPS black iron pipe shall? Not be used in a con-
cealed location (6.3.9)
a. Not be used for propane
b. Not be used in a concealed location
c. Not be used for natural gas
d. Not be used for indoors

3. A corrugated metal gas connector connected to a 6' (6.21.3)
range must not exceed?

a. 6'
b. 5'
c. 3'
d. 4'

4. A manual shut-off valve shall be installed? In either drop of riser
of a residential appliance
a. only on natural gas appliances (6.18.2)



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b. in either drop of riser of a residential appliance
c. downstream of the union
d. at the drip pocket

5. Black iron pipe 2 1/2 NPS at 150' long shall be pressure 50 psig for 60 minutes
tested to? (Table 6.3)

a. The greater of 50psig or 1.5 times the maximum
operation pressure for 180 minutes
b. 50 psig for 180 minutes
c. 1.5 times the maximum operation pressure for 180
minutes
d. 50 psig for 60 minutes

6. Buried piping or tubing shall be? Only copper type L coated,
type G coated, type K un-
a. only copper type L coated, type G coated, type K coated (6.2.7)
uncoated
b. only copper type K, L or type G
c. schedule 50 ASTM A-53
d. only copper type L or G coated

7. What is pressure drop? The difference in the
working pressure at the
a. The difference in the static pressure at the meter, gas meter, and the work-
and the working pressure at the appliance regulator ing pressure at the appli-
b. The difference between the U tube manometer is ance regulator
the end that is open to the atmosphere and the pres-
surized side when the appliance regulator is working
c. The difference between supply pressure and appli-
ance manifold pressure when the appliance calls for
heat
d. The difference in the working pressure at the gas


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meter, and the working pressure at the appliance reg-
ulator

8. Fittings used for steel piping may be made from? Malleable iron and steel
(6.2.2)
a. brass or iron
b. copper to malleable iron
c. steel and plastic
d. malleable iron and steel

9. Posts protecting piping and tubing entering a building Buried not less than 36"
from vehicular damage shall be? below grade
(6.16.15)
a. clearly marked and identified with yellow paint
b. Be spaced not more than 48" apart
c. Buried not less than 36" below grade
d. Made from 6x6 pressure treated wood

10. The equivalent length of a 2 1/2 NPS forged tee is? 9.25' (Table A 16)

a. 9.25'
b. 12.4'
c. 15.3'
d. 10.3'

11. What is the maximum horizontal spacing of supports 10' (3m) (Table 6.2)
for N.P.S. 1 1/4 inch gas pipe?

a. 8'
b. 15'
c. 6'
d. 10'

12.


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When gas piping enters a building, it must? Enter above grade
(6.15.8)
a. Enter above grade
b. Be taped, painted, and sleeved
c. Have a tracer wire
d. Enter below grade

13. When sizing a branch line, what is the minimum size 3/4" NPS (6.8.8)
of job fabricated welding fittings that can be used on
a NPS 6 gas supply header?

a. 2" NPS
b. 3/4" NPS
c. 3" NPS
d. 1/2" NPS

14. A dirt pockets shall be installed at the bottom of any Clothes dryer (6.13.1)
piping or tubing, on the final drop serving an appli-
ance other than a(n)

a. Unit Heater
b. Furnace
c. Clothes dryer
d. Boiler

15. Direct-vent wall furnace shall use what maximum 2 ft. (6.21.3(c))
length of corrugated metal gas connector?

a. 6 ft.
b. 4 ft.
c. 8 ft.
d. 2 ft.