Bu 2 Finals

Front 1

Air conditioning is defined as the simultaneous control of air temperature, humidity, motion and purity of air in a confined space

Back 1

AIR CONDITIONING

Front 2

A device which provides air conditioning

Back 2

AIR CONDITIONER

Front 3

A form of energy that is transformed by temperature difference

Back 3

HEAT

Front 4

The quantity of heat in BTU/min in a fluid or gas

Back 4

ENTHALPY

Front 5

A heat- exchange device in a refrigeration system it consist of a vessel or arrangement of pipes or tubing in which refrigerant vapor is liquefied by the removal of heat

Back 5

CONDENSER

Front 6

A machine for drawing refrigerant from the evaporator relatively low pressure, compresses and then discharges it to the condenser

Back 6

COMPRESSOR

Front 7

That part of the refrigeration system in which refrigerant is vaporised, thereby taking up external heat and producing cooling.

Back 7

EVAPORATOR

Front 8

Heat transmission, either natural or forced, by currents resulting from differences in density due to temperature differences in the heated space

Back 8

CONVECTION

Front 9

Water vapor within a confined space or environment

Back 9

HUMIDITY

Front 10

The ratio of the weight of water vapor actually humid air to the maximum possible weight of water vapor that the air could contain at the same temperature

Back 10

RELATIVE HUMIDITY

Front 11

Weight of water vapor in a mixture per pound of dry air

Back 11

HUMIDITY RATIO

Front 12

A regulatory device actuated by changes in humidity

Back 12

HUMIDISTAT, HYGROSTAT

Front 13

A device which responds to changes in temperature directly or indirectly

Back 13

THERMOSTAT

Front 14

The introduction of water into unsaturated air to increase humidity ratio but without transfer of heat to or from an outside source.

Back 14

ADIABATIC SATURATION

Front 15

The temperature at which air-water vapor mixture will become saturated and begins to yield drops of condensed water

Back 15

DEW POINT

Front 16

The amount of heat which is absorbed or evolved in changing the sale of the substance without changing its temperature

Back 16

LATENT HEAT

Front 17

One where change is from liquid to solid state

Back 17

LATENT HEAT OF FUSION

Front 18

One where change is from liquid to gas

Back 18

LATENT HEAT OF VAPORIZATION

Front 19

Heat in BTU absorbed by a substance in changing its temperature without changing its state

Back 19

SENSIBLE HEAT

Front 20

Temperature shown by a thermometer with a wetted bulb rotated rapidly in the air to cause evaporation of its moisture

Back 20

WET BULB TEMPERATURE

Front 21

Temperature of air- water vapor mixture as measured in the normal way with Farenheight thermometer

Back 21

DRY BULB TEMPERATURE

Front 22

An absorber which could be liquid or solid that can remove water vapor from a material

Back 22

DESICCANT

Front 23

A device used to vary the volume of air passing through an air outlet, inlet or duct

Back 23

DAMPER

Front 24

A passageway usually fabricated of metal, fibreglass, concrete or cement and asbestos fibres; used to transfer air from one location to another.

Back 24

DUCT, AIR CONDITIONING DUCT, AIR DUCT

Front 25

A device used to separate solids such as dirt, dust and other particles from air

Back 25

FILTER

Front 26

A substance which produces refrigerating effect by absorbing heat while expanding or evaporating

Back 26

REFRIGERANT

Front 27

A synthetic chemical refrigerant

Back 27

FREON

Front 28

The process of supplying or removing air by natural method or mechanical means to or from any space

Back 28

VENTILATION

Front 29

The useful refrigerating effect equal to 21 KV min or 288,000 BTU 24 hrs or 12000 BTU/hr.

Back 29

TON OF REFRIGERATION

Front 30

A specific refrigerating machine combination for a given refrigerant

Back 30

CONDENSING UNIT

Front 31

An evaporator constructed with a pipe or tubing

Back 31

EXPANSION COLT

Front 32

Any device equipped with heating element used in the refrigerating system to increase the pressure of the refrigerant

Back 32

GENERATOR

Front 33

Equipment including any or all of the following compressor, condenser, generator, evaporator, absorber, receiver connecting pipe, air handling units, dehumidifier, and heat exchanger

Back 33

AIR CONDITIONING MACHINERY

Front 34

A type of system used for small installation such as residences and small offices

Back 34

UNIT AIR CONDITIONER

Front 35

Composed of two separate sections, one installed inside the room while the other is mounted outside the building

Back 35

SPLIT TYPE AIR CONDITIONER

Front 36

A type of air conditioning system used for large installations with the use of ducts

Back 36

CENTRALIZED TYPE AIR CONDITIONING SYSTEM

Front 37

The ratio annual fuel output energy to annual input energy

Back 37

AFUE (ANNUAL FUEL UTILIZATION EFFICIENCY)

Front 38

A structure, usually on the root of the building over which water is circulated so as to cool it evaporatively in contact with air

Back 38

COOLING TOWER

Front 39

The ratio of the rate of heat removal lo the rate of energy input

Back 39

COP (COEFFICIENT OF PERFORMANCE) FOR COOLING

Front 40

The ratio of the rate of heat delivered to the rate of energy input

Back 40

COP (COEFFICIENT OF PERFORMANCE) FOR HEATING

Front 41

The ratio of net equipment cooling capacity in BTU/hr to the total rate of electric input in watts

Back 41

EER (ENERGY EFFICIENCY RATIO)

Front 42

A single number figure of merit based on part-load EER or COP

Back 42

IPLV (INTEGRATED PART LOAD VALUE)

Front 43

The total cooling output of an air conditioner during its normal annual usage, in BTU/ hr, divided he total energy total output input during the same period, in watt-hours.

Back 43

SEER (SEASONAL ENERGY EFFICIENCY RATIO)

Front 44

MODES OF HEAT TRANSMISSION

Back 44

1.) CONDUCTION

2.) CONVECTION

3.) RADIATION

Front 45

SYSTEMS INVOLVED

Back 45

1.) Cooling and dehumidifying

2.) Heating and humidifying of air

3.) Cleaning of air(Filtration)

4.) Circulation of air

Front 46

REGULATION ESSENTIAL FOR HUMAN COMFORT

Back 46

1.) Temperature of the surrounding air

2.) Temperature of the surrounding surfaces

3.) Relative Humidity of air

4.) Motion of Air

5.) Odors

6.) Dust

Front 47

COMFORTABLE WEATHER AND SPEED

Back 47

68 - 74 farenheight; 20-23 degree celsius; 4.57- 7.6 meter per minute

Front 48

HEAT GAIN IN BUILDING

Back 48

1.) Walls, Roofs, floors partitions, ceilings and glass

2.) Solar Radiation

3.) Infiltrating or ventilating outside air

4.) Given off by occupants

5.) Lights, cooking devices, motors, fans

Front 49

COOLING LOAD FACTORS

Back 49

1.) Internal Loads

2.) Thermal Transmission loads

3.) Infiltration and ventilation load

4.) Solar load

Front 50

Unitary Type Air conditioning system is composed of the following

Back 50

1.) FAN COIL UNIT

2.) AIR COOLED CONDENSING UNIT (ACCU)

Front 51

FANCOIL UNIT COMPONENTS

Back 51

FAN, COIL, FILTER

Front 52

AIR-COOLED CONDENSING UNIT COMPOSITION

Back 52

1.)AIR COOLED CONDENSER

2.)COMPRESSOR

Front 53

AIR- COOLED CONDENSER

Back 53

1.) ACC FAN

2.) CONDENSING COIL

Front 54

AIR-COOLED WATER CHILLER

Back 54

1.) AIR COOLED CONDENSING UNIT (ACCU)

2.) EVAPORATOR

3.) CHILLED WATER PIPES

Front 55

AIR CONDITIONING UNIT

Back 55

1.) FAN COIL UNIT

2.) COMPRESSOR

Front 56

TYPES OF SUPPLY DUCT SYSTEMS

Back 56

1.) PLENUM DUCT SYSTEM / PERIMETER RADIAL SYSTEM

2.) EXTENDED PLENUM SYSTEM

3.) REDUCING EXTENDED PLENUM SYSTEM

4.) PERIMETER LOOP SYSTEM

Front 57

TYPES OF EVAPORATOR

Back 57

1.) STAMPED EVAPORATOR

2.) FINNED TUBE

3.) DRY TUBE OR DIRECT EXPANSION EVAPORATOR

Front 58

TYPES OF CONDENSER

Back 58

1.) WATER-COOLED CONDENSER

2.) DOUBLE PIPE CONDENSER

3.) SHELL AND TUBE CONDENSER

4.) SHELL AND COIL CONDENSER

Front 59

TYPES OF COMPRESSOR

Back 59

1.) ROTARY TYPE

2.) RECIPROCATING TYPE

3.) CENTRIFUGAL TYPE

Front 60

TYPES OF COOLING TOWER

Back 60

1.) NATURAL DRAFT

2.) FORCED DRAFT

3.) EVAPORATIVE

Front 61

A motor driven device mounted on the which opens and closes the door.

Back 61

DOOR OPERATOR

Front 62

The power unit which applies the energy necessary, to raise and lower an elevator or a dumbwaiter or to drive an escalator, an inclined lift or a moving walk

Back 62

DRIVE MACHINE

Front 63

The grooved wheel of a traction-type hoisting machine over which the hoist rope motion is imparted to the car and counterweight by the hoist ropes

Back 63

DRIVE SHEAVE

Front 64

That portion of a floor, balcony or platform for loading or discharging passengers o eight to or from the elevator

Back 64

ELEVATOR LANDING

Front 65

Maximum number of passengers that can be handled in a given period

Back 65

HOLDING CAPACITY

Front 66

Average time between departure of cars from the lobby

Back 66

INTERVAL(I) OR LOBBY DISPATCH TIME

Front 67

Waiting time at an upper after registering a call

Back 67

REGISTRATION TIME

Front 68

An electric device that is designed to interpret input conditions in a prescribed manner and conditions are met, to respond and cause contact operation or create change in associated electrical system

Back 68

RELAY

Front 69

Average time required for a car to make a round trip

Back 69

ROUND TRIP TIME (RT)

Front 70

A cable made up of electrical conductors which provides electrical connection between dumbwaiter car, or material lift and a fixed outlet in the hoist way or machine room

Back 70

TRAVELING CABLE

Front 71

A group of floors

Back 71

ZONE

Front 72

A conveying device used to transport people from floor of a building to another. movement may be vertical or diagonal.

Back 72

PASSENGER ELEVATOR

Front 73

An elevator used for carrying materials and cargo, it allows operator and the persons necessary for loading and unloading of loads.

Back 73

SERVICE OR FREIGHT ELEVATOR

Front 74

Elevator that is suspended by tension cables and operated by electric hoisting machinery. Sometimes referred to as Traction Elevator. This type of elevator is used exclusively in tall buildings and operated by direct current(dc) motors.

Back 74

ELECTRIC ELEVATOR

Front 75

An elevator system where the movement is car or cab is dependent on the pressure applied through a system of retractable tubas containing oil that is pumped into it from the reservoir. This type of elevator is used where short travel and slower speed is required and overhead equipment is not desired.

Back 75

HYDRAULIC ELEVATOR

Front 76

An elevator with cables fastened to and wound around on a drum; counterweight is not necessary

Back 76

WINDING DRUM MACHINE

Front 77

An elevator in which the movement of the car is derived by means of direct contact between the traction sheave and the hoisting cables, caused by friction between the two surfaces.

Back 77

TRACTION MACHINE

Front 78

This is the load-carrying unit of an elevator including its platform, frame and enclosure.

Back 78

CAR OR CAB

Front 79

These are steel wire ropes used for the suspension of a car and counterweight. These cables then pass over a motor-driven cylindrical sheave at the traction machine and pass downward to the counterweight to which they are fastened with the cable sockets

Back 79

CABLES

Front 80

Machine that turns the sheave and lilts or lowers the car

Back 80

ELEVATOR MACHINE

Front 81

These are rectangular blocks of cast iron stacked in a frame, which is supported at the opposite ends of the cables to which the car fastened, it balances the weight of car plus 40% of car capacity

Back 81

COUNTERWEIGHT

Front 82

These are vertical tracks that guide the car and counterweight

Back 82

GUIDE RAILS

Front 83

It is the vertical passageway for the car and counter weight

Back 83

SHAFT OR HOISTWAY

Front 84

The room usually directly above the hoist way in which the elevator machine is housed

Back 84

PENTHOUSE OR ELEVATOR MACHINE ROOM

Front 85

That portion of the hoist way extending below the level of the bottom landing to provide for over travel and clearance for parts which requires space below the bottom of car travel.

Back 85

ELEVATOR PIT

Front 86

A combination of push buttons, contacts, relays, cams and devices, which are operated manually or automatically, to initiate the door operation, starting, acceleration, retardation, levelling or stopping of the Car

Back 86

CONTROL EQUIPMENT

Front 87

Register calls and governs response to elevator

Back 87

CONTROL PANEL

Front 88

It supplies direct current (dc) to motor; used with generator field control

Back 88

MOTOR GENERATOR

Front 89

Uses an individual generator for each elevator so that voltage applied to the hoisting motor is adjusted by varying the strength of the generator field. It allows wide range of speed, including high speeds and permits smooth acceleration and retardation.

Back 89

GENERATOR FIELD CONTROL

Front 90

Are fastened to car frame and counterweight at top and bottom; it is used to guide rails

Back 90

GUIDE SHOES

Front 91

Moving mechanism of a brake, lined with friction material which, when in contact holds the elevator when power is applied on the hoist motor

Back 91

BRAKE SHOE

Front 92

These are ropes or chains that hang from bottom of car to bottom of counterweight in order to balance the weight of hoist ropes

Back 92

COMPENSATOR

Front 93

A device installed at the bottom or pit of an elevator, which is used to absorb impact of car or counterweight at the lower limit of travel.

Back 93

BUFFER

Front 94

The electro-mechanical device used to prevent the elevator from moving when the car motion is applied to the hoist motor, it also stops the elevator when power is hoist motor.

Back 94

BRAKE

Front 95

The moving component of a brake, provided with friction material, which when in contact, holds the elevator at floor level.

Back 95

BRAKE SHOE

Front 96

A device, usually of carbon or graphite composition. used to connect a circuit with a DC motor, generator or other electrical device. It carries current to and from the car

Back 96

BRUSH

Front 97

A device that causes car and counterweight to stop in case of emergency by actuating the safety. This initiates the activation of the car safety switch, which cuts off power to the drive motor and brake if the car travels at a preset overspeed direction.

Back 97

GOVERNOR

Front 98

It provides double wrap of ropes for traction and leads rope over to counterweight.

Back 98

SECONDARY SHEAVE

Front 99

A device incorporated in the bottom beam of the car frame and counterweight, exerts retarding force in case of over-speed by gripping guide rails.

Back 99

SAFETY SWITCH

Front 100

These are automatic devices that stop the car within the over-travel, independently of the operating device.

Back 100

LIMIT SWITCHES

Front 101

It refers to any of the car switches. push buttons, wheels, levers, etc. which enables the operator to actuate the control.

Back 101

OPERATING DEVICES

Front 102

A component of an elevator that gives stability to a governor rope.

Back 102

TENSION SHEAVE

Front 103

A mechanism or control, which will move the car to within a limited, zone and stop it at the landing.

Back 103

CAR LEVELING DEVICE

Front 104

This is measured within 18" above or below the landing

Back 104

LANDING ZONE

Front 105

A direct current (dc system of control by varying resistance and reactance in the field circuit of hoisting motor, alternating current motors starts across the line.

Back 105

RHEOSTATIC CONTROL

Front 106

One in which the ropes are fastened to and wound on a drum. No counterweight is required but it is not permitted on passenger elevators.

Back 106

WINDING DRUM MACHINE

Front 107

One of the electric cables connecting an elevator car to a fixed electrical outlet in the hoist way, it moves along with the car.

Back 107

TRAVELING CABLE

Front 108

CONSIDERATIONS FOR ELEVATOR SELECTION

Back 108

1.) TOTAL HEIGHT

2.) FLOOR TO FLOOR HEIGHT

3.) CAPACITY

4.) SPEED REQUIREMENT

5.) TYPE OF STRUCTURE

Front 109

The simplest modes of elevator. One call at a time

Back 109

SINGLE AUTOMATIC PUSH-BUTTON CONTROL

Front 110

Elevator stops at each floor. registered to "collect" the waiting passenger

Back 110

COLLECTIVE CONTROL

Front 111

Most advanced and monitors demand and controls each car's motion

Back 111

COMPUTERIZED SYSTEM CONTROL

Front 112

ESCALATOR ARRANGEMENT

Back 112

1.) PARALLEL (NO WALKAROUND)

2.) PARALLEL (WITH WALKAROUND)

3.) CRISSCROSS

Front 113

The toothed portion of the threshold plate at both ends of an escalator or moving walk, designed to mesh with the grooved surface of the moving steps or treadway.

Back 113

COMBPLATE

Front 114

Located at the top and bottom newels, it will start, stop and reverse the stairway movement.

Back 114

KEY OPERATED CONTROL SWITCHES

Front 115

A three section built-up welded steel trussed framework which supports the moving stairway equipment.

Back 115

TRUSS

Front 116

It include top and bottom sprocket wheel where the endless belt of steps pass around when it is on operation.

Back 116

SPROCKET ASSEMBLIES

Front 117

It provides the motive power of the unit

Back 117

DRIVING MACHINE

Front 118

This is designed for maximum safety of persons stepping on or off the escalator It includes all enclosures consisting of deck boards, concave inside panel skirt guards, handrails and combplates.

Back 118

BALUSTRADE ASSEMBLY

Front 119

The side of an escalator extending above the steps, it also includes skirt panel, interior panels.

Back 119

BALUSTRADE

Front 120

A continuous belt(chain) attached to the handrail and indirectly connected to the steps.

Back 120

ENDLESS BELT

Front 121

A continuous assembly of steps which supports the passengers

Back 121

STEP ASSEMBLY

Front 122

This is located at the top sprocket and will stop a loaded escalator safely in the event of a break in the chain

Back 122

EMERGENCY BRAKE

Front 123

It consists of relays and a circuit breaker normally located near the driving machine.

Back 123

CONTROLLER

Front 124

This is wired to the controller and placed near or on the escalator housing which will stop the driving machine and apply the break.

Back 124

EMERGENCY STOP BUTTON

Front 125

MOST USED REFRIGERANT

Back 125

R-22 - MONOCHLORODIFLUORMETHANE - HCFC - RESIDENTIAL