Common occupation skills Flashcards
what is the defintion of a class B fire
Liquids, Gases, gasoline or oil-based products
what sling configuration would be rated with the most capacity for a lifting procedure?
basket sling with 2 vertical legs
what procedure is used to determine if additional PPE is required for a specific task on a job site
Complete a hazard assessment
A 4-inch SS pipe is 86.9 ft. How many hangers are to be placed at 5.25 ft intervals and requires to support the pipe with hangers at both sides of the runs?
18
A 6” (150mm) cast iron pipe with a 1/4” 6mm wall thickness requires a sleeve. what is the minimum inside diameter of the sleeve required?
6 1/2
1/4 + 1/4= 1/2
what is the minuim ground cover for underground gas piping mm
300 or 12”
What piping would require a fire donut
ABS Piping pass through fire rated wall
if 2-inch NPS pipe has an I.D of 2.067 inches and an O.D of 2.375 inches. What is its wall thickness.
0.154 = (OD-ID) / 2= (2.375-2.067)/2= 0.154
A pipe has an I.D of 12” and a wall thickness of 3/8. if 1” of insulation is to be installed on the pipe with 1” clearance to the pipe sleeve, what is the minimum I.D of the sleeve?
12” = 2inches (insulation, clearnace) (2 x 3/4inches)= 16 3/4
3/8 x 2 = 3/4
if a horizontal pipe is 90’ feet long and requires hangers spaced every 10 ft, how many hangers would be needed, excluding those at each end?
90/10=9 -1 = 8
10,20,30,40,50,60,70,80
What is the following is lowest on the E.M.F (electromotive force) series?
gold
If granite has a specific gravity of 2.7 what is its approximate density
1 kg= 0.0624 LBS
1m= 35.31 ft
2.7 x 100kg
2700 x 0.0624/1/35.31= 168.48 lb/ft
The proper wrench used to tighten a flat-edged fitting is?
Spud wrench
with a power vise the only safe reamer to use is a
fluted reamer
the type of die head used on a power vise threader that doesn’t require reversing in order to disengage the pipe is called.
quick opening
guard rails when required shall be placed at _ inches
42 inches
The maximum height at which a worker can work above ground before requiring a guard rail is?
10 ft
if a ladder is placed agaisnt a 20’ high building, which as a 2ft overhang, how far will the base of the ladder be from the building?
20/4 + 2overhang= 7
if a ladder were set to WCB regulations how long must it be (minimum) if it were to be used to access the roof of a 20’ foot high building?
23 ft 7 inches
3’
Center punching of concrete is done to
assess the power level needed of a power actuated tool
an ___ is best suited to anchor a piece of machinery to a concrete floor
expansion shield and bolt
which of the following knots can be used to join 2 ropes of different diameters
sheet bend
a “bowline on the bight” is tied
in the middle of the rope
When lifting a pipe with a crane, how should the tagline be attached to the pipe?
clove hitch
