High Pressure Piping and Welding Practice Exam Review

Question and answer flashcards covering high pressure piping regulations, fitting dimensions, boiler feedwater requirements, welder qualifications, and welding acronyms.

What is the minimum pipe size for a blowoff tank syphon breaker?

$$3/4\,\text{inch}$$

True or False: The employer shall maintain records of all welders, weld procedures, and weld tests.

True

What are the High Pressure Piping Journeyman Pipefitter qualifications?

1. At least 20 years of age; 2. Able to read and comprehend blueprints for HPP; 3. 4 year registered unlicensed individual or pipefitter; 4. Exam fee of $50; 5. Pass test with 70 out of 100.

If a certified welder is qualified to weld with E6010 F# 3, what other rod is that welder qualified to weld with?

E6011 F# 3

What shall be used on all right angle turns on water column piping?

Crosses

What is the minimum size of water column fittings?

$$3/4\,\text{inch}$$

What are the minimum clearances around and under a blowdown tank in a walled pit?

Around clearance: $18\,\text{inches}$; Under clearance: $12\,\text{inches}$

What is the face to center dimension of a 6 NPS steel butt welded elbow fitting?

$$9\,\text{inches}$$

How is the maximum lift of a steam trap discharging to an elevated condensate return main calculated?

Calculated by how much steam pressure is inside the piping and how much condensate is being sent out at the trap.

What is the face to heel dimension of a 4 inch NPS steel butt welded long radius return bend fitting?

$$8\frac{1}{4}\,\text{inches}$$

How many bolts are needed for a 12 NPS Class 150 flange?

12 bolts

How many means of feeding water are required when a boiler's water heating surface exceeds $500\,\text{sq ft}$?

2 means of feed water

What clearance is recommended between a pipe (or pipe and insulation) passing through a sleeve?

$$1/2\,\text{inch}$$

Upon successful completion of a 2 inch Schedule 80 6G Welder Performance Qualification test, what is the maximum pipe diameter that welder is qualified to weld?

Unlimited

Which pipe grade has the lower carbon content: A53 Grade A or A53 Grade B?

A53 Grade A

Which unit of state government adopts high pressure piping rules that must be followed in the state?

Commissioner of the Department of Labor and Industry

All valves and fittings on the feedwater piping shall be at least how many times the lowest set pressure of any boiler safety valve?

$1.25$ times

Each boiler feed water pump shall supply water at a pressure of what percent higher than the safety valve setting?

$3\%$ higher

What is the constant for expansion of copper in inches per 100 feet?

$.0000095$ ($.0000045 \times 12 \times 100$)

A53 Type E pipe has what type of seam?

ERW (Electric Resistance Weld)

What are the requirements regarding placement of valves between a boiler and its water column?

Must have a valve and check valve, straightaway type, with a lever or rising stem, sealed opened.

What valve shall be installed upstream of a steam desuperheater stop valve?

Check Valve

Who can repair or rebuild pressure relief valves?

ASME Certificate Holder / Manufacturer

What does the acronym SMAW stand for?

Shielded Metal Arc Welding

What does the acronym GTAW stand for?

Gas Tungsten Arc Welding

What does the acronym OFW stand for?

Oxy-Fuel Welding

What does the acronym FCAW stand for?

Flux Cored Arc Welding

What does the acronym GMAW stand for?

Gas Metal Arc Welding