Practice Questions Flashcards
(17 cards)
Question 1:
What is the minimum slope requirement for a flat roof to allow proper drainage?
A) 1/8 inch per foot
B) 1/4 inch per foot
C) 1/2 inch per foot
D) 1 inch per foot
Answer: B) 1/4 inch per foot
Rationale: A flat roof should have a minimum slope of 1/4 inch per foot to prevent water accumulation and allow proper drainage, reducing the risk of leaks and structural damage.
Question 2:
Which type of piping is most susceptible to corrosion over time?
A) PVC
B) Copper
C) Galvanized steel
D) PEX
Answer: C) Galvanized steel
Rationale: Galvanized steel pipes corrode over time due to their zinc coating wearing away, leading to rust buildup and reduced water flow. This is a common issue in older plumbing systems.
Question 3:
What is the primary function of a GFCI outlet?
A) Preventing electrical fires
B) Protecting against overcurrent
C) Reducing the risk of electric shock
D) Increasing voltage capacity
Answer: C) Reducing the risk of electric shock
Rationale: Ground Fault Circuit Interrupters (GFCIs) detect imbalances in electrical currents and shut off power when necessary, significantly reducing the risk of electric shock, especially in wet areas like bathrooms and kitchens.
Question 4:
Which of the following materials is most commonly used for residential roof shingles?
A) Metal
B) Slate
C) Asphalt
D) Clay tiles
Answer: C) Asphalt
Rationale: Asphalt shingles are the most common roofing material due to their affordability, durability, and ease of installation, making them the preferred choice for residential homes.
Question 5:
What is the primary purpose of a weep hole in brick veneer construction?
A) Structural reinforcement
B) Drainage and ventilation
C) Aesthetic appeal
D) Pest prevention
Answer: B) Drainage and ventilation
Rationale: Weep holes allow moisture to escape from behind the brick veneer, preventing water damage, mold growth, and deterioration of the building materials.
Question 6:
In a forced-air heating system, what component distributes warm air throughout the home?
A) Heat exchanger
B) Evaporator coil
C) Blower fan
D) Condenser
Answer: C) Blower fan
Rationale: The blower fan pushes heated air through the duct system, ensuring even distribution of warm air throughout the home.
Question 7:
What is the typical lifespan of a tank-style water heater?
A) 5-8 years
B) 10-15 years
C) 20-25 years
D) 30+ years
Answer: B) 10-15 years
Rationale: Most conventional tank-style water heaters last between 10 and 15 years with proper maintenance before efficiency declines or failure occurs.
- Air-admittance valves are __________ to vent fixtures installed at island structures in kitchens.
A) Prohibited
B) Permitted
C) Required
D) Optional
Correct Answer: B) Permitted
Rationale: Air-admittance valves are allowed to vent fixtures in island kitchen structures where traditional venting may be impractical.
- The door between an attached garage and a dwelling unit should be of solid wood not less than ________ inches thick.
A) 1 inch
B) 1 1/8 inches
C) 1 3/8 inches
D) 1 1/2 inches
Correct Answer: C) 1 3/8 inches
Rationale: To provide adequate fire resistance, the door must be solid wood and at least 1 3/8 inches thick.
- Notches in solid lumber joists, rafters, and beams should not be longer than ____________ the depth of the member.
A) One-fourth
B) One-third
C) One-half
D) Two-thirds
Correct Answer: B) One-third
Rationale: Limiting notch length to one-third of the member’s depth helps maintain structural integrity.
- The size of a P-trap drainpipe should be at least _______ inches.
A) 1 inch
B) 1 1/4 inches
C) 1 1/2 inches
D) 2 inches
Correct Answer: C) 1 1/2 inches
Rationale: A minimum P-trap size of 1 1/2 inches ensures proper drainage and prevents clogs.
- For a conventional gas furnace, about ________ per 1,000 BTUs of ventilation for combustion air should be provided.
A) 1 square inch
B) 2 square inches
C) 5 square inches
D) 10 square inches
Correct Answer: B) 2 square inches
Rationale: Providing 2 square inches of ventilation per 1,000 BTUs ensures adequate combustion air for safe furnace operation.
- If the service or feeder rating in amps is 200, then the aluminum AWG size should be _______.
A) 2 AWG
B) 1/0 AWG
C) 2/0 AWG
D) 4/0 AWG
Correct Answer: C) 2/0 AWG
Rationale: A 2/0 AWG aluminum conductor is appropriate for a 200-amp service, ensuring safe electrical capacity.
- If a roof is used for a purpose other than weather protection, the vent extensions should extend above the roof by at least ____ feet.
A) 2 feet
B) 4 feet
C) 6 feet
D) 8 feet
Correct Answer: B) 4 feet
Rationale: Extending vent pipes at least 4 feet above roofs used for other purposes prevents obstruction and ensures proper venting.
- In homes located in areas having a history of ice forming along the eaves, an ice barrier consisting of at least three layers of underlayment cemented together is required.
A) True
B) False
Correct Answer: A) True
Rationale: Installing an ice barrier with three layers of underlayment helps prevent water intrusion from ice dams in susceptible areas.
- The minimum allowed slope of graded soil next to a building’s foundation, according to the International Residential Code (IRC), is __________.
A) 2%
B) 5%
C) 10%
D) 15%
Correct Answer: B) 5%
Rationale: A 5% slope (6 inches drop over 10 feet) directs water away from the foundation, reducing moisture-related issues.
- Methane gas, which may be present in confined spaces such as a basement, can cause death by __________.
A) Explosion
B) Asphyxiation
C) Infection
D) Burns
Correct Answer: B) Asphyxiation
Rationale: Methane can displace oxygen in confined spaces, leading to asphyxiation.
