CEM 121 Exam 2 multiple choice version 2

Two-Way Slab (Flat Plate / Flat Slab)

A) A slab supported strictly on outside perimeter foundation walls\nB) A slab reinforced to transfer loads in two directions, often using drop panels at columns\nC) A precast panel deck topped with lightweight gypsum\nD) A framing system supported by continuous wood headers

Rafter vs. Ridge Board

A) Rafters run horizontal at the peak; ridge boards run diagonally\nB) Rafters are angled members supporting roof sheathing; the ridge board is the horizontal apex member\nC) Rafters tie walls together; ridge boards support ceiling drywall\nD) Rafters are vertical studs; ridge boards are exterior fascia

Roof Pitch / Slope

A) The total span divided by rafter line length\nB) The relationship of vertical rise per 12 inches of horizontal run\nC) The thickness of oriented strand board roof sheathing\nD) The overhang distance past the exterior wall

Stair Tread vs. Riser

A) Treads are vertical face boards; risers are walking surfaces\nB) Treads are horizontal walking boards; risers are vertical spacing members (risers = treads + 1)\nC) Treads are handrail caps; risers are balusters\nD) Treads support landings; risers connect stringers to walls

Rough-in Plumbing (Stage 2)

A) Setting finish faucets, toilets, and trim accessories\nB) Installing water supply lines, drain lines, and DWV stacks before enclosing walls\nC) Digging exterior municipal water main service trenches\nD) Final leak testing and fixture demonstration

DWV System

A) Domestic Water Valve system\nB) Drain-Waste-Vent piping network\nC) Direct Wall Venting assembly\nD) District Water Volume supply line

Cleanout (CO)

A) A floor drain positioned in commercial kitchens\nB) A capped, accessible pipe fitting used to clear obstructions from drainage lines\nC) An overflow trap primer on water heater pans\nD) A clean-water bypass line around water meters

PEX Tubing

A) Heavy rigid cast-iron soil pipe\nB) Flexible, lightweight cross-linked polyethylene tubing for water distribution\nC) Solvent-welded black plastic pipe for sewer lines\nD) Galvanized conduit for electrical feeders

PVC vs. CPVC

A) PVC is for hot water; CPVC is for cold water only\nB) PVC is for cold water and DWV; CPVC is chlorinated for both hot and cold pressure piping\nC) PVC is flexible rubber; CPVC is rigid copper tubing\nD) PVC is joined by threads; CPVC can only be sweated with solder

Hydronic Heating System

A) A system moving heated air through overhead sheet-metal ducts\nB) A closed system circulating boiler-heated water through pipes to convectors or radiators\nC) An electric resistance cable embedded in drywall ceilings\nD) An outdoor cooling package using evaporative pads

Ceiling Diffuser vs. Floor Register

A) Diffusers are for exhaust only; registers are for fresh intake\nB) Diffusers distribute supply air laterally in multiple directions; registers cover floor supply/return openings\nC) Diffusers use motorized dampers; registers have fixed vanes\nD) Diffusers are only installed in residential walls

Unit Cooling vs. Remote Cooling

A) Unit coolers use chilled water; remote systems use evaporative pads\nB) Unit coolers are self-contained window/wall units; remote systems place condensing units outdoors\nC) Unit coolers only operate in winter; remote systems run continuously\nD) Unit coolers require ductwork; remote coolers never use ducts

Evaporative Cooler (Swamp Cooler)

A) A high-efficiency heat pump utilizing ground refrigerant loops\nB) A system that pulls dry air over water-soaked pads, cooling by evaporation and raising humidity\nC) A multi-zone central chiller for large commercial office buildings\nD) A cooling system using chilled brine lines through concrete slabs

Welding Reference Line

A) A leader line pointing to the joint seam\nB) The continuous horizontal line upon which all weld symbols, dimensions, and notations are placed\nC) A dashed line representing the root opening of a groove\nD) A vertical boundary line marking shop versus field fabrication

Arrow Side vs. Other Side (Weld)

A) Symbols above the line apply to arrow side; below apply to other side\nB) Symbols below the line apply to arrow side; above apply to other side\nC) Symbols on the left apply to arrow side; right apply to other side\nD) Symbols in the tail apply to arrow side; on the leader apply to other side

Fillet Weld Symbol

A) A semi-circle indicating weld melt-through\nB) A right triangle whose vertical perpendicular leg is always on the left\nC) A square box representing backing plates\nD) An equilateral triangle centered on the leader arrow

Weld All-Around Symbol

A) A solid black flag positioned at the reference junction\nB) A circle placed at the elbow where the arrow connects to the reference line\nC) A double parallel line placed above the tail\nD) An asterisk centered in the reference line note

Field Weld Symbol

A) A square placed on the reference line\nB) A small flag placed at the junction of the arrow and reference line\nC) A solid black half-circle centered on the tail\nD) An uppercase "F" inside the tail note

Weld Size & Length Notation (e.g., 1/4 [Fillet] 2-12)

A) 1/4" root gap, 2" pass width, 12 passes total\nB) 1/4" weld leg size, 2" weld length, spaced 12" on-center (pitch)\nC) 1/4" groove angle, 2' length, 12 hours cooling time\nD) 1/4" electrode diameter, 2 welds on arrow side, 12 on other side