Mixed Deck — All Other Skilled Trades Topics Flashcards
100 cards from real Other Skilled Trades practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 20 Mixed Deck — All Other Skilled Trades Topics flashcards as text
What type of drill bit is best for drilling out a hardened lock cylinder?
Answer: Carbide-tipped bit
Carbide-tipped drill bits are required for drilling out lock cylinders because they can penetrate the hardened steel anti-drill pins and core material.
What is the purpose of using a notched trowel when setting tile?
Answer: Creating uniform ridges in adhesive mortar for better tile bonding
A notched trowel creates uniform ridges in the mortar bed that collapse and spread evenly when the tile is pressed in, ensuring consistent adhesive coverage.
What type of duct fitting reduces turbulence and pressure loss when making a 90° turn in a rectangular duct system?
Answer: Square throat elbow with turning vanes
Square throat elbows fitted with turning vanes redirect airflow smoothly through the 90° turn, significantly reducing turbulence and static pressure loss compared to unvaned elbows.
In an air distribution system, what is the difference between a supply air register and a return air grille?
Answer: Supply registers deliver conditioned air into the space; return grilles draw room air back to the air handler
Supply registers blow conditioned air from the air handler into the room, while return grilles pull room air back to the air handler to be reconditioned.
In pipefitting, what is the difference between a 'long radius' and 'short radius' elbow?
Answer: Long radius has a centerline radius of 1.5x the pipe diameter; short radius has 1x the pipe diameter
A long radius elbow has a centerline bend radius of 1.5 times the nominal pipe diameter, causing less pressure drop and turbulence than a short radius elbow with a 1x diameter radius.
What type of roofing nail should be used for most asphalt shingle applications?
Answer: Ring-shank or screw-shank galvanized steel nails
Ring-shank (annular ring) galvanized roofing nails have superior holding power and resist corrosion, making them the standard choice for asphalt shingle installation.
Which type of glue is best suited for outdoor woodworking projects exposed to moisture?
Answer: Polyurethane glue
Polyurethane glue is waterproof and expands as it cures, making it ideal for exterior woodworking projects exposed to weather and moisture.
What does HVAC stand for?
Answer: Heating, Ventilation, and Air Conditioning
HVAC stands for Heating, Ventilation, and Air Conditioning — the three core functions of building climate control systems.
What minimum mortar coverage is required beneath floor tile per ANSI standards?
Answer: 80 percent
ANSI standards require a minimum of 80 percent mortar coverage under floor tile to ensure adequate adhesion and no hollow voids that could lead to cracking.
What does the acronym MIG stand for in MIG welding?
Answer: Metal Inert Gas
MIG stands for Metal Inert Gas, a welding process that feeds a continuous solid wire electrode through a welding gun shielded by an inert gas.
What is the purpose of a vapor barrier in floor framing over a crawl space?
Answer: To prevent moisture from rising into the floor structure
A vapor barrier (typically 6-mil poly sheeting) is placed over the crawl space ground to prevent ground moisture from rising and damaging the floor framing.
What US certification is required to renovate homes with lead-based paint?
Answer: EPA RRP Renovation Repair and Painting certification
The EPA RRP Rule requires certified contractors for work that disturbs lead-based paint in pre-1978 residential buildings.
Which ASTM standard governs the specification for mortar for unit masonry?
Answer: ASTM C270
ASTM C270 is the standard specification for mortar for unit masonry, defining the mix proportions and minimum properties for Types M, S, N, and O mortar.
What is the primary purpose of a ledger board in deck construction?
Answer: To attach the deck to the house structure
A ledger board is bolted directly to the house's rim joist or band joist to anchor one side of the deck frame to the home.
In CMU construction, what is the purpose of grouting the cores of hollow blocks?
Answer: To increase the wall's compressive and tensile strength, especially when reinforcing bars are present
Grouting CMU cores bonds the concrete with reinforcing bars and fills voids, significantly increasing the wall's structural strength in both compression and tension.
What is back-buttering a tile?
Answer: Applying an additional thin layer of adhesive to the back of the tile itself
Back-buttering applies a thin coat of thinset to the back of the tile in addition to the substrate, ensuring full adhesive coverage and eliminating hollow voids beneath the tile.
What is the term for the horizontal distance a roof travels from the outside wall to the ridge?
Answer: Run
The run is the horizontal distance from the outside edge of the wall plate to directly beneath the ridge, equal to half the total span of the roof.
What does double rub count measure when evaluating upholstery fabric?
Answer: The number of back-and-forth friction cycles before wear shows
Double rub count measures fabric durability by counting how many back-and-forth friction cycles the fabric can withstand before showing wear.
What is the primary purpose of a knee kicker in carpet installation?
Answer: To stretch carpet onto tack strips
A knee kicker is used to stretch carpet short distances and secure it onto the tack strip along walls.
What is lippage in tile installation?
Answer: The vertical height difference between edges of adjacent tiles
Lippage is the vertical displacement between the edges of adjacent tiles; excessive lippage is a defect that creates an uneven surface and can be a trip hazard.