Boilermaker study guide
what is used to determine the total number of down comers required when erecting a tower? -
ANS-Material list
What are the two major hazards when opening a sealed vessel? - ANS-Pressure differential and
product
What is the storage method for oxygen and acetylene gas cylinders? - ANS-Separated, upright
and secured in a designated area
What must be obtained before beginning work in any tank or confined space? - ANS-Entry
permit
A w 8x 30 beam is 37ft.9 in. In length and weights 26 lbs/ft. What is the weight of the beam? -
ANS-982 lbs
What is the weight of an s200 x27x3500 beam? - ANS-5400.0 kg
When retubing an evaporator, what is the safest and most efficient method to hoist the tubes? -
ANS-Use a crane, lifting device and tagline
What is the main advantage of lifting with a basket hitch? - ANS-It has double the capacity of a
single vertical hitch
Which configuration is best suited to lift a vessel shell section is 5 ft in diameter and 10 ft in
length? - ANS-Double gasket hitch
Which knot is tied 5/8 in. Rope and a 1/2 in. Rope? Skeet bend - ANS-Sheet bend
What is the mean diameter ofa cylinder that is be rolled to an od of 74in. When the material
thickness is 3/4 in? - ANS-73.25in.
A tank is 40 ft. In diameter and 30 ft high. What is done when the gravel base varies by 5/8 in.?
- ANS-Complete the tank floor and the first ring, then adjust the bed to horizential level
In which part of a boiler and hand hole caps or handhole plugs located? - ANS-Header
Why are curtains aligned after being hung in the precipitators? - ANS-To insure the electrostatic
feild will operate efficiently
, How many rafters are to be installed at a chord distance of 6 ft. 3/8in. On a 40ft diameter? -
ANS-20
After installing the floor plates in a dry bottom precipitator, what is done? - ANS-Remove all
dogs and tasks
Where are steam separators located? - ANS-Inside the steam drum
When accounting for two wall weaknesses, which percentage of tube wall thinning is normal
when expanding a stainless steel or carbon steel tube? - ANS-5.00 %
Which component prevents internal washing (swirling action) in a drain nozzle on a vertical
pressure vessel? - ANS-Vortex breaker
What is the working lond limit (wll) of 1/2in. Improved plow steel wire rope? - ANS-2.0 tons
What length of plate 16mm this is required to form a cylinder with an od of 2 438 mm? -
ANS-7607 mm
What is the mean diameter of a cylinder that is to be rolled to an od of 74.in. If the material
thickness is 3/4in.? - ANS-73.25 in.
A bulk storage tank has a diameter of 80 ft. And a shell plate thickness of 1 1/8 in. What is the
inside radius to which the shell plates would be positioned? - ANS-39ft 11 7/16 in.
what is done after installing the floor plates In a dry bottom precipitator? - ANS-Remove all dogs
and tacks
What is done to temporally suspend the steam drum on a bottom supported boiler until the tack
tubes are installed and expanded? - ANS-Suspend it from a crane
The scale on a drawing is 1 in. =1ft. What is the length of the line that represents an object with
a dimension size of 18in. On the drawing? - ANS-1 1/2 in.
Which instrument is used with a Micrometer to determine precise id measurements? -
ANS-Telescoping gauge
What is the offset between cans when fitting circumferential seams on penstock sections with a
3/4 in. Difference in diameter? - ANS-3/8 in
Given no direct crane access, what is the best method for landing and securing an 8 ft by 8 ft
platform complete with grating and handrails? - ANS-Transfer load to local rigging and bolt up
what is used to determine the total number of down comers required when erecting a tower? -
ANS-Material list
What are the two major hazards when opening a sealed vessel? - ANS-Pressure differential and
product
What is the storage method for oxygen and acetylene gas cylinders? - ANS-Separated, upright
and secured in a designated area
What must be obtained before beginning work in any tank or confined space? - ANS-Entry
permit
A w 8x 30 beam is 37ft.9 in. In length and weights 26 lbs/ft. What is the weight of the beam? -
ANS-982 lbs
What is the weight of an s200 x27x3500 beam? - ANS-5400.0 kg
When retubing an evaporator, what is the safest and most efficient method to hoist the tubes? -
ANS-Use a crane, lifting device and tagline
What is the main advantage of lifting with a basket hitch? - ANS-It has double the capacity of a
single vertical hitch
Which configuration is best suited to lift a vessel shell section is 5 ft in diameter and 10 ft in
length? - ANS-Double gasket hitch
Which knot is tied 5/8 in. Rope and a 1/2 in. Rope? Skeet bend - ANS-Sheet bend
What is the mean diameter ofa cylinder that is be rolled to an od of 74in. When the material
thickness is 3/4 in? - ANS-73.25in.
A tank is 40 ft. In diameter and 30 ft high. What is done when the gravel base varies by 5/8 in.?
- ANS-Complete the tank floor and the first ring, then adjust the bed to horizential level
In which part of a boiler and hand hole caps or handhole plugs located? - ANS-Header
Why are curtains aligned after being hung in the precipitators? - ANS-To insure the electrostatic
feild will operate efficiently
, How many rafters are to be installed at a chord distance of 6 ft. 3/8in. On a 40ft diameter? -
ANS-20
After installing the floor plates in a dry bottom precipitator, what is done? - ANS-Remove all
dogs and tasks
Where are steam separators located? - ANS-Inside the steam drum
When accounting for two wall weaknesses, which percentage of tube wall thinning is normal
when expanding a stainless steel or carbon steel tube? - ANS-5.00 %
Which component prevents internal washing (swirling action) in a drain nozzle on a vertical
pressure vessel? - ANS-Vortex breaker
What is the working lond limit (wll) of 1/2in. Improved plow steel wire rope? - ANS-2.0 tons
What length of plate 16mm this is required to form a cylinder with an od of 2 438 mm? -
ANS-7607 mm
What is the mean diameter of a cylinder that is to be rolled to an od of 74.in. If the material
thickness is 3/4in.? - ANS-73.25 in.
A bulk storage tank has a diameter of 80 ft. And a shell plate thickness of 1 1/8 in. What is the
inside radius to which the shell plates would be positioned? - ANS-39ft 11 7/16 in.
what is done after installing the floor plates In a dry bottom precipitator? - ANS-Remove all dogs
and tacks
What is done to temporally suspend the steam drum on a bottom supported boiler until the tack
tubes are installed and expanded? - ANS-Suspend it from a crane
The scale on a drawing is 1 in. =1ft. What is the length of the line that represents an object with
a dimension size of 18in. On the drawing? - ANS-1 1/2 in.
Which instrument is used with a Micrometer to determine precise id measurements? -
ANS-Telescoping gauge
What is the offset between cans when fitting circumferential seams on penstock sections with a
3/4 in. Difference in diameter? - ANS-3/8 in
Given no direct crane access, what is the best method for landing and securing an 8 ft by 8 ft
platform complete with grating and handrails? - ANS-Transfer load to local rigging and bolt up
