Test 3

Question 1

What cast iron item is not allowed on a high-pressure boiler?

Answer 1

Nozzles or flanges

Question 2

When piping up a boiler gauge glass to a water tube boiler, the lowest visible part of the Water gauge glass shall be at least how many inches above the lowest permissible water level (determined by the boiler manufacturer?)

Answer 2

2

Question 3

The ASME high pressure boiler code limits the use of non-ferrous valves. What is the limitation for 250 psi class bronze threaded gate valve?

Answer 3

406°F

Question 4

All gage glass connections shall not be less than what size pipe?

Answer 4

1/2”

Question 5

The ASME high pressure boiler code says that non-ferrous pipe or tubes shall not be used in the boiler proper for any service where the temperature exceeds how many degrees?

Answer 5

406°F

Question 6

Gage glass drains shall have an unrestricted drain opening of not less than _______ inch.

Answer 6

1/4

Question 7

When two or more high pressure boilers are connected to a common steam header, the connection from each boiler having a manhole opening shall be fitted with,

Answer 7

Two stop valves having an ample free-blow drain between them

Question 8

For high pressure boilers having a water heating surface of more than 100 sq. ft of heating surface the feed connection to the boiler shall not be smaller than what pipe size?

Answer 8

3/4

Question 9

ASME B.31.1 Power piping code limits the size of slip-on flanges to be used for boiler external piping. The size limitation is what pipe size in diameter?

Answer 9

4

Question 10

A slow- opening valve requires how many complete turns to be fully opened or closed?

Answer 10

5

Question 11

The ASME power piping code B31.1 limits the size of ANSI class 600 socket welded for use in boiler external piping. Choose the maximum size limitation.

Answer 11

3

Question 12

According to the ASME high pressure boiler code, a boiler that has more than how many square feet of heating surface must have two or more safety valves?

Answer 12

500

Question 13

ASME B31.1 power piping code part 6 boiler external piping requires the attachment of slip on flanges shall be of what type of welds

Answer 13

Double fillet

Question 14

The steam and water connections to a water column or a water gage glass on a high-pressure boiler shall be such that they?

Answer 14

Readily accessible for internal inspection and cleaning

Question 15

ASME B31.1 Power piping code requires that boiler blow-off fittings shall be steel and
pressure exceeds what pressure (psi)?
the thickness of pipe and fittings shall not

Answer 15

100

Question 16

Shut off valves shall not be used in the pipe connections between a boiler and a water column unless they are what type valves (which must be looked and sealed open)?

Answer 16

OS & Y or level fitting

Question 17

ASME power piping code requires that when the boiler steam outlet is over what size NPS and OS & Y valve shall be used.

Answer 17

2

Question 18

The bottom blowdown line of a high-pressure water tube boiler is connected to where on the boiler?

Answer 18

The mud drum

Question 19

Which valve is not appropriate as a boiler steam outlet valve on a high-pressure boiler?

Answer 19

Ball valve

Too quick to open and tephlon gasket

Question 20

The size of bottom blowoff lines can be reduced under what conditions?

Answer 20

None