Book 1: Chapter 5, Basic Fittings for Steam Boilers

Question 1

The boiler vent valve is used for the purpose of allowing:
A. Steam to enter while draining

B. Water to escape while filling

C. Air to escape while draining

D. Air to escape while filling

E. Steam to escape while filling

Answer 1

D. Air to escape while filling

Question 2

A Bourdon tube is in the shape of:

A. A bellows

B. A diaphragm

C. The letter “C” and oval in cross section

D. The letter “C”

E. An oval in the cross section

Answer 2

C. The letter “C” and oval in cross section

Question 3

Try cocks are used on boilers to:

A. Drain water from the water column

B. Prove the temperature of the steam

C. Test the operation of the safety valve

D. Check the boiler water level

E. Test for steam pressure

Answer 3

D. Check the boiler water level

Question 4

The blowdown of a safety valve may be decreased by:

A. Increasing the spring pressure

B. Raising the lifting lever

C. Lowering the adjusting ring

D. Raising the adjusting ring

E. Decreasing the spring pressure

Answer 4

C. Lowering the adjusting ring

Question 5

When installing a pressure gauge and siphon on a boiler it is important to:

A. Fill the siphon with water first

B. Slowly open the valve to fill the siphon with water

C. Slowly open the valve to fill the siphon with steam

D. Fill the siphon with instrument oil

E. Allow the steam to condense in the siphon

Answer 5

A. Fill the siphon with water first

Question 6

A heating boiler must have a permanently attached marker indicating:
Select one:

A. Lowest permissible steam level

B. Lowest permissible water level

C. The maximum allowable working temperature

D. Highest permissible water level

E. The maximum allowable working pressure

Answer 6

B. Lowest permissible water level

Question 7

When the pressure inside the Bourdon tube increases the tube will tend to:
Select one:

A. Curve more showing lower pressure

B. Straighten showing higher pressure

C. Become more oval showing higher pressure

D. Straighten showing lower pressure

E. Curve more showing higher pressure

Answer 7

B. Straighten showing higher pressure

Question 8

A valve commonly used as a boiler stop valve is the _____ valve.
Select one:

A. Ball

B. Plug

C. Gate

D. Butterfly

E. Needle

Answer 8

C. Gate

Question 9

When the main steam stop valves of heating boilers are over 51 mm (2 in.) it is recommended that _____ be used.
Select one:

A. Gate valves

B. Globe valves

C. Diaphragm operated valves

D. OS & Y valves with rising spindles

E. Solenoid operated valves

Answer 9

D. OS & Y valves with rising spindles

Question 10

The blowdown tank is/does

Select one:

A. Does not empty into the sewer

B. Not cool the water

C. Is not required on a low pressure boiler

D. Does not allow the pressure to be reduced

Answer 10

C. Is not required on a low pressure boiler

Question 11

The blowdown connection is made to the:
Select one:

A. Highest point of the mud drum

B. Highest point of the steam drum

C. Lowest point of the mud drum

D. Highest point of the boiler shell

E. Lowest point of the steam drum

Answer 11

C. Lowest point of the mud drum

Question 12

If the steam passage to the boiler gauge glass becomes obstructed:
Select one:

A. The steam level in the glass will fall

B. The steam level in the glass will rise

C. The water level in the glass will rise

D. The water level in the glass will fall

E. There will be no change

Answer 12

C. The water level in the glass will rise

Question 13

Quick closing gauge glass valves require _____ turn/s to close.
Select one:

A. 2

B. 3

C. 1

D. ¼

E. ½

Answer 13

D. ¼

Question 14

A pressure gauge can most accurately be calibrated by using:
Select one:

A. Another pressure gauge

B. Hydraulic comparator

C. A test gauge comparator

D. The Inspector’s test gauge

E. A dead weight tester

Answer 14

E. A dead weight tester

Question 15

The Inspector’s test gauge is used to:
Select one:

A. Confirm the pressure shown on the boiler pressure gauge

B. Confirm that there is pressure on the boiler

C. Calibrate the pressure gauge on the boiler

D. Test the pressure on the boiler

E. Measure the pressure on the boiler

Answer 15

A. Confirm the pressure shown on the boiler pressure gauge

Question 16

The purpose of the gauge glass or water gauge is to show the _____ in the boiler.
Select one:

A. Temperature of the steam

B. Color of the water

C. Steam level

D. Pressure of the water

E. Water level

Answer 16

E. Water level

Question 17

A safety valve must be mounted:
1. In the horizontal position
2. To the boiler by a short nipple
3. At the highest practicable part of the boiler
4. With discharge water properly drained
5. With a valve next to the boiler
Select one:

A. 2, 4, 5

B. 1, 2, 3

C. 1, 3, 5

D. 2, 3, 4

E. 3, 4, 5

Answer 17

D. 2, 3, 4

Question 18

The safety valve pop test can be carried out by:
Select one:

A. Slowly raising the boiler pressure

B. Lowering the try lever

C. Popping the valve with a hammer

D. Lifting the try lever

E. Reducing the pressure on the spring

Answer 18

A. Slowly raising the boiler pressure

Question 19

The “popping” pressure of a safety valve may be increased by:
Select one:

A. Decreasing the spring pressure

B. Raising the lifting lever

C. Increasing the spring pressure

D. Lowering the adjusting ring

E. Raising the adjusting ring

Answer 19

C. Increasing the spring pressure

Question 20

In a pressure gauge the Bourdon tube is connected to the pointer via a/an:
Select one:

A. Wheel and axle

B. Geared sector and pinion

C. Pulley and cable

D. Differential gear

E. Rack and pinion

Answer 20

B. Geared sector and pinion

Question 21

Boiler gauge glass packing nuts may be tightened:
Select one:

A. Only hand tight

B. With a torque wrench

C. Once the glass has cooled to room temperature

D. Once the pressure has been removed

E. At any time

Answer 21

D. Once the pressure has been removed

Question 22

Boiler fittings must comply with the requirements set out in the:
1. ASME Codes
2. ANSI Codes
3. CSA B51
4. CSA B52
5. The regulations of the authority having jurisdiction
Select one:

A. 2, 3, 4

B. 2, 3, 5

C. 1, 3, 5

D. 3, 4, 5

E. 1, 2, 3

Answer 22

C. 1, 3, 5

Question 23

Boiler gauge glasses will break while in service due to the:
Select one:

A. Difference in temperature between the water and steam

B. Draft of hot air hitting the glass

C. Thinning of the glass by the action of the steam

D. Safety lifting due to over pressure

E. Strain due to gauge fittings being in line

Answer 23

C. Thinning of the glass by the action of the steam

Question 24

A pipe siphon is used on a boiler to:
Select one:

A. Add water to the Bourdon tube

B. Maintain a water seal between the water and the Bourdon tube

C. Remove water from the boiler drum

D. Maintain a water seal between the steam and the Bourdon tube

E. Maintain a steam seal between the steam and the Bourdon tube

Answer 24

D. Maintain a water seal between the steam and the Bourdon tube

Question 25

The procedure for testing a directly connected gauge glass would be.
1. Close the gauge water valve
2. Open the gauge water valve
3. Close the gauge steam valve
4. Open the gauge steam valve
5. Close the gauge drain valve
6. Open the gauge drain valve
7. Proving steam passage is clear
8. Proving water passage is clear
Select one:

A. 1, 6, 7, 3, 2, 8, 5

B. 1, 6, 7, 2, 8, 3

C. 3, 6, 8, 3, 7, 5

D. 3, 6, 8, 4, 1, 7, 2

E. 1, 6, 7, 3, 8, 5

Answer 25

A. 1, 6, 7, 3, 2, 8, 5

Question 26

Quick closing gauge glass valves are operated by:
Select one:

A. Solenoids

B. Levers and chains

C. Actuators

D. Valve rods

E. Diaphragms

Answer 26

B. Levers and chains

Question 27

All fittings not properly or clearly identified:
Select one:

A. May be used for low pressure service

B. Should be kept for emergency use

C. Can be used in water applications

D. Can be used for compressed air service

E. Should be rejected

Answer 27

E. Should be rejected

Question 28

All fitting markings shall be legible and must indicate the following minimum requirements.
1. National Pipe Size
2. Manufacturer’s name or trade mark
3. Vendors Identification
4. Service designation
5. Material designation
Select one:

A. 3, 4, 5

B. 1, 2, 3

C. 1, 3, 5

D. 2, 3, 4

E. 2, 4, 5

Answer 28

E. 2, 4, 5

Question 29

A hydrostatic test is at a pressure of

Select one:

A. 1.5 times the bursting pressure

B. 1.5 times the maximum allowable working pressure

C. 1.5 times atmospheric pressure

D. 1.5 times the operating pressure

Answer 29

B. 1.5 times the maximum allowable working pressure

Question 30

A check valve is used in the feedwater line to prevent:
Select one:

A. Water hammer in the feedwater line

B. A reverse flow of water from the boiler

C. A reverse flow of steam from the boiler

D. A reverse of water from the feedwater line

E. Air from entering the feedwater line

Answer 30

B. A reverse flow of water from the boiler