[Assimilation Alex] Mechanical (001-100)
Terms in this set (98)
A stream of high-velocity temperature-controlled air which is directed downward, across an opening
AHU (Air Handling Unit)
A package assembly of air conditioning components which provides for the treatment of air it is distributed to an air conditioned space.
A device designed to stop an elevator car or counterweight from descending beyond its normal limit of travel
The portion of the hoist way extending from the threshold level of the lowest landing door to the floor at the bottom of the hoist way.
When the elevator car rest on its fully compressed buffer, there shall be a vertical clearance of not less than between the pit floor and the lowest structural or mechanical part.
There shall be installed in the pit of each elevator where the pit extend more than ___ below the sill of the pit access door
Dumbwaiters total inside height shall not exceed ____
Is the achievement of a temperature below that of the immediate surroundings.
Consist of a platform or car traveling in vertical guides in a shaft or hoist way, with related hoisting and lowering mechanisms.
Device for heating water or generating steam above atmospheric pressure.
A system for transporting materials from one site to another, especially in a factory
Machine that decreases the volume and increases the pressure of a quantity of air by mechanical means.
A device that maintains, control of the indoor environment—its desirable temperature, humidity, air circulation, and purity for the occupants of that space or for the industrial materials that are handled or stored there.
Device that convert electrical energy into mechanical energy, by electromagnetic means.
A machine that converts mechanical energy into electrical energy called
Device for reducing the temperature of a liquid, usually water, by bringing it into contact with an airstreams where a small portion of the liquid is evaporated and the major portion is cooled.
A machine often provides the most convenient and economical means of transporting relatively small articles between levels.
Gives stability to governor ropes.
Are vertical tracks that guide the car and counterweight?
Are rectangular blocks of cast-iron stacked in a frame, which is supported at the opposite ends of the cables to car is fastened.
Is the vertical passageway for the car and counterweight?
Are fastened to car frame and counterweight at top and bottom.
Is a device to absorb the impact of car or counterweight at the lower limit of travel?
A device use for moistening the air at the desired degree?
centralized air con
An air-conditioning system in which the air is treated by equipment at one or more central locations outside the spaces served and conveyed to and from these spaces by means of fans and pumps through duct and pipes.
Its function is to dispose the heat carried away from the condenser
Type of elevator that is raised or lowered quite simply by means of movable rod or plunger?
it is a device to control the temperature.
It is a three - section built up welded steel trussed framework, which supports the moving stairway component
In electric elevator machine room is located at the
Is mechanical device for transporting persons between two levels.
The ratio of the maximum demand of a system, or part of a system, to the total connected of a system or the part of a system under consideration is called -
The following are basic component parts of an
Tesla is the unit of____.
Which of the following is not a component of a
A bathroom containing a water closet, a
lavatory, and a bathtub.
Method of cooling
The following are elements of centralized
airconditioning system except _______.
All of the above
Acoustics is a science that concerns with
a. Transmission of sound
b. Effect of sound waves
c. Generation of sound
It is the flow of heat through a material by transfer from warmer to cooler molecules in contact with each other.
Is a valve or plate that stops or regulates the flow of air inside a duct, chimney, air handler, or other air handling equipment.
What is also known as a synthetic chemical refrigerant?
gas used as refrigerant with water
an air compartment or chamber
liquid which is discharged as a waste
A material which stops the transfer of heat is also known as?
device used only to add humidity in the air
heat is transferred through materials
a process which refrigerant from liquid to gas
What is a cooling or heating element which is made of pipe or tubing?
device to control the thermostat
device used to vary the volume of air passing a duct
It is a platform or car for hoisting or lowering passenger or freight.
stops car and grips counterweight in case of emergency
where the endless belt of steps pass around during operation
of an escalator
What is a closed vessel in which liquid is heated or vaporized?
pipe fitting with outside threads use for connecting pipes
vessel where vapor is liquefied by removal of heat
It consists of DC motors and the shaft of which is connected directly to the brake wheel and driving sheave.
the art and practice of heating and cooling with water
steel wires used to compensate cars and counterweights
Electric and Hydraulic
Two types of passenger elevator.
Minimum elevator width of single slide door elevator
for small commercial or residential building.
Automatic Transfer Switch
A device that is basically a double throw switch of
generally 3-pole connection that will automatically transfer
the power from the standby generator to the building
circuitry during electrical power failure.
The minimum face to face distance between elevators
in three and four car grouping.
Maximum height of a dumbwaiter.
A controller sensitive to the degree of moisture in the
Another name for Humidistat.
Descriptive of any material such as synthetic resin
which hardens when heated or cured, and does not soften
An Instrument which responds to changes in
temperature, and directly or indirectly controls
A machine that converts mechanical energy into
electrical energy, a generator of alternating current.
Freon in air-con must be compressed and liquefied in
order to absorb ___.
A device installed on an electric water heater used to
detect the working temperature to activate a switch.
Vertical flow of air used to separate different functions
Fixed Temperature Heat Detector
A fire detector installed in a fire alarm system which
uses low melting point solders or metal that expands
when exposed to heat to detect a fire.
Heat rating for a fixed temperature heat detector.
An air-operated device used to open or close a damper or
68-74 ˚F /20-23 deg C
The effective room temperature in air-conditioning.
A graph used in air-conditioning and showing the
properties of air-system mixtures.
Heat that raises air temperature.
The transmission of heat energy from one place to another
by circulatory movement of a mass of fluid.
Energy Efficiency Rating
What is the rating index of an airconditioning/
refrigeration system which rates the unit for the
number of BTU's of heat removed per watt of electrical input
Fan Coil Unit
What mechanical equipment, coupled with a central airconditioning
system, is used to to dehumidify and cool the air
stream injected to a conditioned space.
In elevator, it detects the obstacles during the door closing,
and reopens the door if there is something. Photocell can be
used together with this.
It prevents passengers from falling into the hoistway when
they try to get out of the car which is stopped between the
In elevator, it makes the buzzer alarm when the car is
overloaded and the door remains open until overloading is
In elevator, it protects the equipment from over current.
In elevator, these prevent the excessive car travel at the
highest and lowest floor.
Handrail Guard Switches
In escalators, these stop the escalator if a foreign object
becomes wedged at the guard.
In escalators, this is located at the bottom truss of the escalator and provided with on and off positions to stop or
prevents the escalator from starting during maintenance service.
Mechanical Maintenance Locking Device
This device, in escalators, is provided at the drive unit
location to protect against accidental movement of the escalator
during inspection of the drives or during general maintenance.
Current Overload Safety Switch
This device, in escalators, stops the escalator automatically
if an abnormal current is supplied to the motor.
This switch cuts off all current supply to the escalator for
inspection, maintenance, or repairs.
Ton of Refrigeration
The cooling effect obtained when 1 ton of ice at 32 oF (0
oC) melts to water at the same tmeperature in 24 hrs.
An assembly consisting of a pulley wheel, side plates,
shaft, and bearings over which a cable or roped is passed.
Consist of a flyball or flyweight device designed to stop
In theater stage house, a weight usually of iron or sand
used to balance suspended scenery, or the like.
On elevators, a gear-driven machine having a drum to
which the wire ropes that hoist the car are fastened, and on
which they wind.
Limit Controls and Interlocks
In boilers, they function only when it exceeds prescribed
unsafe operating conditions.