Exac - Theme 3 Coordinating Engineering Systems Exam Questions With Correct Answers

EXAC - THEME 3: COORDINATING
ENGINEERING SYSTEMS EXAM



Principles of a Structural System - Correct Answers -- Designed and constructed to
support and transfer loads safely to the ground without exceeding allowable stresses in
each member.
- Strive for a state of equilibrium
- Free Body Diagram (FBD) illustrates forces acting and reacting to structural loading

Identify types of Static Loads - Correct Answers -Applied slowly to the structure without
rapid fluctuation:
- Dead Load (weight of structure and materials)
- Live Load (moving or movable loads from occupancy)
- Snow Load (weight of snow on a structure)
- Settlement Load (structure settling on ground pressure)
- Hydrostatic Load (pressure from water on the foundation)

Elements of HVAC: All Water Systems - Correct Answers -- Uses piping to deliver hot
and cold water to Fan Coil Units drawing air from the room and outside air heated or
cooler over coils and redistributed into the space
- Two-Pipe: uses one pipe to supply, one to return HW or CW
- Four-Pipe has HWS & CWS and HWR & CWR for more flexible temperatures
- Ventilation provided through wall openings or by separate duct system
- Each zone is separately controlled

Typical HVAC Terms - Correct Answers -MAU - Make-up Air Unit supplies fresh air into
building
HRV - Heat Recovery Unit recovers heat from exhaust air and uses it to warm up supply
air
ERV - Energy Recovery Unit recovers heat and humidity from exhaust air and uses it to
warm up supply air

Principles of a Electrical System - Correct Answers -- Controls, meters and protects
electric power supply to a building and distributes it in a safe manner for power, lighting,
security and communications
- Supply can come from the electric company or a step-down transformer
- Connects to building via conduits underground or overhead -> transformer -> main
service switch/disconnect -> main switchboard -> panel boards -> conduits & wires ->
receptacles & switches

, Identify types of Dynamic Loads - Correct Answers -Applied suddenly to a building with
rapid changes:
- Wind Load (exerted by kinetic energy of moving air mass)
- Seismic Load (earthquake waves on a structure)

Main elements of a Structural System - Correct Answers -Substructure (Foundation)
- Anchors superstructure and transfer loads to ground
- Distributes loads evenly throughout supporting earth
Superstructure (Framing)
- Vertical extension of a building above foundations
- Comprised of columns, beams, slabs, bearing walls and roof structures

Types of Excavations - Correct Answers -- Soldier Piles & Lagging
- Sheet Piling
- Tie-backs
- Slurry Wall
- Dewatering

Elements of Superstructure - Correct Answers -Columns
- Support axial compressive loads applied to the ends of the members
- Wood, masonry, concrete, steel
- Can fail due to compressive forces exceeding load bearing capacity
Beams
- Transfers loads horizontally to vertical supports
- Deflection occurs when bending moment is opposite to resisting moment
- Efficiency is increased when deeper members to minimize bending stress
Trusses
- Structural frame based on rigidity of triangular shape
- Top and bottom chords help distribute forces along web members

What is a Vierendeel Truss? - Correct Answers -A framed beam structure having
vertical web members rigidly connected to parallel top and bottom chords. It is not a true
truss since its members are subject to non-axial bending forces.

Main elements of a Water Supply System - Correct Answers -- Provides potable water
for human consumption, sanitation and fire suppression
- Supplied by municipal water main or well
- Up-feed systems use municipal pressure (up to 6 storeys)
- Down-feed systems pump water to roof top and allow gravity to feed building.
Equipment
- Electric tank water heater, Water softener, Shut-off valves, Back-flow preventers,
piping and fixtures

Main elements of a Sanitary Drainage System - Correct Answers -- Removes fluid
waste and organic matter from a building