BU TEST REVIEWER

3.5 sqmm#12 AWG

Minimum size of a THWN wire (In AWG) for lighting fixtures?

At every horizontal soil or waste branch less than 15 meters long

Which of the following is NOT true in terms of providing cleanouts in the piping system?

Panel board

Divides an electrical power feed into subsidiary circuits, while providing a protective overcurrent device for each circuit in a common enclosure.

Reverberation

Persistence of sound in an enclosed space resulting from repeated reflection or scattering of sound.

Decibel

Unit of loudness level

Siphonage

A suction created by the flow of liquid in pipes: a pressure less than the atmospheric pressure.

75 mm

Code-prescribed minimum drain pipe size of a w/c?

Service drop

Overhead service conductor from the pole or other aerial support to and including the splices, if any, connecting to the service entrance conductors of a building.

Electric metallic conduit

Metal pipe into which electrical conductors may be drawn; it has a wall section thinner than a rigid metal conduit and is used for both exposed and concealed work.

Metal Clad cable (Type MC)

A factory assembly of one or more conductors, each individually insulated and enclosed in a metallic sheath of interlocking metal tape, or a smooth corrugated metallic tube.

Elevator pit

Portion of the hoistway that extends below the level of the bottom landing or floor to provide for overtravel and clearance for parts that require space below the bottom of the car travel.

Resistance and reactance

Resistance in AC, also known as impedance, is a combination of _____ and _____.

Clean-out

A device or appurtenance provided with a cap or plug with female (?) design to provide access or means of removing instructions or deposits inside pipes in vertical or horizontal installations.

Travelling cables

Electronic cables connecting an elevator car to a fixed electrical outlet in the hoistway.

Curve surface

Creep is a phenomenon whereby sound travels along a ____.

Stack

A vertical line of soil, waste, or vent pipe.

Diffraction

Bending of the travel of sound caused by an obstacle in its path.

Warm air generated inside a room is collected by compressor and brought to a condenser and releases it to the air outside.

What working principles are involved in the operation of an air-conditioning system in a building?

Building supply pipe

First section of water supply piping in a building after the water meter.

Longitudinal

Type of wave that transports energy by moving particles of the medium are moving back and forth in a left and right direction.

Fixture units

Value derived based on the load-producing characteristics of fixtures measured in terms of volume per unit time rate.

Counterweight

Rectangular cast-iron blocks stacked in a frame and supported at opposite ends of the cables to which the car is fastened and balances the car.

Amperes

Circuit breakers are ruled in what unit?

100 watts

As per PEC, it is the maximum load given to each lighting outlet.

2%

Min. recommended slope for horizontal excrete drainage pipes having a size < 102 mm.

Bus

A heavy conductor, in the form of a solid copper or aluminum bar, strip, or rod used for conducting, carrying, and distributing large electric currents.

A cable consisting of two or more insulated conductors protected by a flexible metal wrapping

Describes an armored cable

Building sewer

Part of the drainage system that extends from the end of the building drain and conveys its discharge to the public sewer, private sewer, individual sewage disposal system, or other appropriate point of disposal,

Copper

Material used to convey refrigerant from the condenser to the fan coil unit of a split-type ac unit

Upright wye branch

Fittings categorized under sanitary drainage fittings

Masking

Defined as the obscuring or covering up of one sound by another

Service entrance cable

A conductor assembly provided with or without an overall covering, primarily used for services.

Each vent terminal shall not be extended to the outer air to minimize the possibility of clogging and the return of foul air to the building.

Which of the statements doesn’t conform to the general plumbing principles for a sound and efficient system of plumbing?

Air handling unit

Not a major component of a unitary, or window-type ac unit.

Buffer

A piston or spring device that absorbs the impact of a descending elevator car in the elevator pit.

Air handling unit

A packaged assembly for ac components consisting of coils, fibers, a fan, a humidifier, etc. which provides for the treatment of air before it is distributed to an air-conditioned space.

Stack vent

A vent stack must be extended vertically upwards and terminated at the vent stack through the roof through.

All of the above

Sound transmission loss (STL) is/are affected by the following:

Carpet

Material that exhibits the highest sound absorption coefficient (SAC) value.

Branch interval

A vertical length of soil/waste stack at least eight feet in height, within which the horizontal branches from one storey or floor of the building or structure are connected to the stack.

Diffraction

Phenomenon in sound propagation where a sound wave moves around in an object whose dimensions are smaller than or about equal to the wavelength of the sound.

Parallel circuit

Voltage across each component is the same, equal to the source voltage, and the current through each component varies accdg. to the impedance of each element that loads are connected across the lines.

Echo

A reflected sound reaches a listener’s ear with a delay after the initial creation of sound.

When an absorbent is suspended in the trap with one end on the fixture side and the other on the drain side

The condition will result in the loss of the trap seal due to capillary action.

Compressor, condenser, expansion valve, evaporator

The arrangement produces a cooling effect in a refrigerating cycle.

Moisture and heat-resistant thermoplastic, nylon-coated

The trade name for the type of letter THWN Insulated Conductor.

A conductor encased in a material that is not recognized by the code as electrical insulation.

Describes a covered conductor.

Waste stack

A vertical pipe which conveys only wastewater or liquid waste free from pupu matter.

Junction box

An enclosure for housing and protecting electric wires and/or cables that are joined together in connecting or branching electric circuits.