Power Engineering: 3A2 ch 6 Test Questions with Quality Answers 2026 Updated.

Power Engineering: 3A2 ch 6 Test
Questions with Quality Answers 2026
Updated.
C - Answer "Valve trim" refers to the valve _____ and _____.

Select one:

A. Wheel, stem

B. Bonnet, packing

C. Disc, seat

D. Inlet, outlet

E. Packing, gland



D - Answer _____ valve bodies in general can be used on water service up to temperatures of
about 250°C.

Select one:

A. Brass.

B. Steel.

C. Steel alloys.

D. Cast-iron.

E. Stainless steel.



C - Answer List the ways that butterfly valves can be installed into a piping system:

1. Welded.

2. Unions.

3. Flanged.

4. Wafer.



Select one:

A. 1, 2

B. 1, 2, 3

C. 3, 4

D. 1, 3

E. 4



A - Answer High performance butterfly valves:

, Have either flangeless or lugged (flanged) connections.

Are designed for use with corrosive fluids.

Are handicapped by lack of tight shutoff.

Select one:

A. 1

B. 2

C. 3

D. 1, 2

E. 2, 3



D - Answer Diaphragms are made of materials resistant to the particular fluids being
transported. Choose four materials which are often used to manufacture diaphrams:

1. Rubber.

2. Neoprene.

3. Cotton.

4. Stainless steel.

5. Polyethylene.

6. Zinc.

Select one:

A. 1, 4, 5, 6

B. 2, 4, 5, 6

C. 1, 2, 3, 5

D. 1, 2, 4, 5

E. 1, 2,4, 6



C - Answer In a balance plug design, downstream ___________ acts on both the top and
bottom of the valve plug, thereby __________ forces on the top and the bottom of the plug.

Select one:

A. flow, equalizing

B. temperature, equalizing

C. pressure, equalizing

D. pressure, increasing

E. flow, reducing



C - Answer A valve with a V-shaped insert would be used as a control valve, since flow
characteristics are usually more: