Practice Questions for All Red Seal Plumber Work Activities

Plumber

Activity A Sample Questions

1. Which of the following is an unsanitary condition?

a. Any trap which does maintain a proper seal
b. Provided with an approved water-sealed trap
c. Any defective fixture, trap or pipe or fitting
d. Supplied with sufficient water

2. A trap which is integral with the fixture must

a. be no smaller than 2 inches
b. be no longer than 3 inches
c. be self-sealing
d. have a smooth waterway

Work Activity A

Activity A has questions on common occupational skills in five activities.

A-1:  Safety-related functions

A-2:  Tools and equipment maintenance.

A-3: Work organization.

A-4: Routine trade activities.

A-5: One question on communication and mentoring techniques.

Activity B Sample Questions

1. When notching the ends of joists to install water piping, the depth of the notches must not exceed ____ of the depth of the joists.

a. 1/16
b. 1/32
c. 1/8
d. 1/4

2. Which of the materials, is approved by the Code to secure water closets to a tile floor?

a. Brass
b. Bismuth
c. Babbitt metal
d. Tungsten

3. The code permits installation of elastomeric compression type joints as an alternative to _________ on hub and spigot cast-iron pipe.

a. Lead and oakum joints
b. Stainless steel no-hub couplings
c. Cement and oakum joints
d. Hot poured compound joints

4. What is the most acceptable code approved fitting to connect two pieces of galvanized steel pipe in the water supply?

a. Black steel dress coupling
b. Brass compression coupling
c. Galvanized union with graphite gasket
d. Galvanized metal to metal ground seat union

Work Activity B

Activity B tests has two tasks, and fifteen questions testing your knowledge of the preparation and assembly of pipes.

B-6: Preparing pipes.

B-7: Tubing, pipe, and joins.

Activity A Answer Key

1. Which of the following is an unsanitary condition?

a. Any trap which does maintain a proper seal – follows sanitary principles
b. Provided with an approved water-sealed trap – follows sanitary principles
c. Any defective fixture, trap or pipe or fitting
d. Supplied with water sufficient – follows sanitary principles

An unsanitary condition is something contrary to sanitary principles or injurious to health.
Answer: C
Major Work Activity A A-1

Unsanitary Conditions include the following:
Any trap which does not maintain a proper trap seal
Any opening in a drainage system. except where lawful, which is not provided with an approved water-sealed trap;
Any plumbing fixture or other waste-discharging receptacle or device. not supplied with water sufficient to flush it and maintain it in a clean condition;
Any defective fixture, trap, pipe or fitting;
Any trap, except were exempted in this Code, directly connected to a drainage system, the seal of which is not protected against siphonage and backpressure by a vent pipe
Any connection, cross-connection, construction or condition, temporary or permanent, which permit or make possible, by any means whatsoever, for any unapproved foreign matter to enter into a water distribution system used for domestic purposes;
And the foregoing enumeration of conditions which the term “insanitary” applies, shall not preclude the application of that term to conditions that are, in fact, insanitary.

2. A trap which is integral with the fixture must

a. be no smaller than 2 inches
b. be no longer than 3 inches
c. be self-sealing
d. have a smooth waterway

Answer:  D
Major Work Activity A A-2

A trap that is integral must have a smooth waterway.

 

Activity B Answer Key

When notching the ends of joists to install water piping the depth of the notches shall not exceed ____ of the depth of the joists.

  1. 1/16
  2. 1/32
  3. 1/8
  4. 1/4

Answer: D

Major Work Activity B B-7

When notching the ends of joists, the depth shall not exceed 1/4 the depth of the joists.

2. Which of the following does not constitute part of a water supply system?

a. Brass
b. Bismuth – Bismuth metal is brittle and so it is usually mixed with other metals to make it useful. Its alloys with tin or cadmium have low melting points and are used in fire detectors and extinguishers, electric fuses and solders.
c. Babbitt metal – Babbitt metal is used as the lining for bearing shells of cast iron, steel and bronze. The Babbitt lining prevents friction and wear that is common when a lubricant is not able to prevent the bearing’s moving parts from welding together. The Babbitt therefore extends the life of the bearing.
d. Tungsten – Current uses are as electrodes, heating elements and field emitters, and as filaments in light bulbs and cathode ray tubes. Tungsten is commonly used in heavy metal alloys such as high speed steel, from which cutting tools are manufactured. It is also used in the so-called ‘superalloys’ to form wear-resistant coatings.

Answer: A
Major Work Activity B B-6
Screws and bolts must be brass

 

3. The code permits installation of elastomeric compression type joints as an alternative to _________ on hub and spigot cast-iron pipe.

a. Lead and oakum joints
b. Stainless steel no-hub couplings – The no-hub coupling shield is designed to adjust to variations in diameters of pipes to be connected. As the stainless-steel worm clamps are tightened, the corrugated shield interlocks with itself.
c. Cement and oakum joints – Except for repairs and connection to existing lines constructed with such joints, cement mortar joints are prohibited in new building
d. Hot poured compound joints

Answer: A
Major Work Activity B B-7
Elastomeric compression type joints may be used for joining hub and spigot cast iron soil pipe as an alternative to lead and oakum joints.

 

4. What is the most acceptable code approved fitting to connect two pieces of galvanized steel pipe in the water supply?

a. Black steel dress coupling – Allowing slight misalignment, vibration, expansion and contraction with a very simple and rapid installation process
b. Brass compression coupling – Compression fittings don’t require any special tools or specific skills to operate. Compression can be used in situations where a heat source, particularly a soldering torch cannot be used. Compression fittings are most ideal in situations where tubes of dissimilar materials need to be joined.
c. Galvanized union with graphite gasket – A flexible graphite filler also allows the gasket to be more tolerant of flange distortion and joint misalignment.
d. Galvanized metal to metal ground seat union

Answer: D
Major Work Activity B B-7
Metal-to-metal ground seat unions should be used in water distribution systems.

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Date Published: Thursday, June 30th, 2022
Date Modified: Tuesday, July 5th, 2022