📝 [PIPE] QB ID: 1517081204 | Advanced Coaching Series | Set 02 – Elements

High temperature coke is made from coal at temperature ranging from

Low temperature coke is formed at temperature below

The specific gravity of wood ranges from

For wet base domestic heating boilers and forced warm air furnaces, stainless steel combustion chambers are used extensively. Type 430 stainless steel is representative of the lowest grade material that maybe used which has a chromium content of

Lubricating coils have flash points from

In air-conditioning and ventilation standards, as the air enters into the living zone, the distance above the floor is

Carbon dioxide concentration is air when measured 910 mm above the floor shall not exceed

An empirically determined index, which combines into a single value the effect of temperature, humidity and air movement on the sensation of warmth or cold felt by the human body.

No refrigerating system shall be installed in any room except

A refinement petroleum naphta which by its composition is suitable for use as a carburetant in internal combustion engine.

A petroleum distillate having a flashpoint not below 22.8°C.

The density of vapor filling the cylinder is

If the temperature in the icebox is too high, the trouble could be:

Natural draft towers can cool the water to within _____ of the wet bulb temperature

In an ammonia system, the oil gage must be kept:

One disadvantage of a CO₂ system is the fact that:

Sweating of the crankcase is caused by:

The term enthalpy

When heat is added to moist air in an air – conditioning process

Air having a relative humidity of 50% is heated in an air conditioning apparatus. After having it will be found that

The ton of refrigeration is a heat unit equivalent to

In the process of heating atmospheric air in an air conditioning apparatus

The temperature at which the vapor in mixture is cooled at constant pressure is called

Refers to the amount of air that has not been in contact, during the sensible cooling process, with the surface of the cooler coil.

The process that the body uses to convert energy in food to heat and work, or the process that determines the rate at which energy is converted from chemical to thermal form within the body.

It is a body insulation that is usually described as a single equivalent uniform layer over the whole body.

Mean radiant temperature is the basic index used to describe the radiant conditions in a space, it is the mean temperature of individual exposed surfaces in the environment.

It is the most common instrument used to determine the main radiant temperature. It consists of a hollow sphere 6 inches in diameter, flat black paint coating, and a thermocouple or thermometer bulb at its center.

It is the mechanism of heat transfer between parts of a continuum because of transfer of energy between particles or groups of particles at the atomic level. It is the mode of heat transmission through the building structure, like the wall, due to the temperature difference between surfaces of the wall.

It is the transport of energy by mixing in addition to conduction. It is associated with fluids in motion, generally through a pipe or duct or along a surface.

A form of thermal convection when the bulk of the fluid is moving relative to the heat transfer surface because such motion is usually caused by a blower, fan, or pump that is forcing the flow.

A form of thermal convection when the motion of the fluid is due entirely to buoyancy forces, usually confined to a layer near the heated or cooled surface.

A mode of heat transfer by electromagnetic waves, an entirely different phenomenon from conduction and convection; it can occur in a perfect vacuum and is usually impeded by an intervening medium.

An enveloped area with significantly higher rate of heat transfer than the contaguous enclosure is called:

It is the total thermal radiation that impinges on a surface from all directions and from all sources.

The transformation of the radiant energy into thermal energy stored by the molecules is known as

It is the return of radiation by a surface without change of frequency; the radiation is “bounced” off of the surface.

In a refrigeration system, the heat absorbed in the evaporator per kg refrigerant passing through

It is the passage of radiation through a medium without change of frequency.

It refers to any glazed aperture in a building envelope, the components of which include: glazing material, either glass or plastic; framing, mullions, muntins, and dividers; external shading devices; and integral shading systems (between glass).

The rate at which energy is transferred to or generated within a space is called:

It is the rate at which energy must be removed from a space to maintain the temperature and humidity at the design values.

It is the rate at which energy is removed from a space by cooling and dehumidifying equipment. This rate must be equal to the cooling load when the space conditions are constant and the equipment is operating.

It is a computer or hand calculation procedure where energy requirements are determined at many outdoor temperature conditions. It is used for the energy calculations of air conditioning systems.

It is the temperature of a uniform environment at 100% relative humidity in which a person or occupant loses the same total amount of heat from the skin as in the actual environment.

It is the ratio of the total evaporative heat loss required for thermal equilibrium to the maximum evaporative heat loss possible for the environment, multiplied by 100, for the steady – state conditions, and with the skin temperature constant at 95 °F.

It is the temperature of a uniform environment at 0% relative humidity in which a person or occupant loses the same total amount of heat from the skin as in the actual environment.

Heat added to or removed from a substance that cause a change of temperature:

It is an environment heat stress index that combines the dry – bulb temperature, a naturally ventilated wet – bulb temperature, and the globe temperature.

It is an empirical index for the combined effect of wind and low temperature.

A method of air handling to an air conditioned room that produces more economical performance as compared with systems where reheat might be required is called.

It is the ratio of the air humidity ratio to the humidity ratio of saturated air at the same temperature.

It is the ratio of the actual partial pressure of vapor and the saturation pressure of vapor corresponding to the actual temperature of the mixture.

Heat gain or heat loss due to a temperature difference across a building element is .

One ton of refrigeration is equivalent to

Air whose condition is such that any decrease in temperature will result in condensation of the water vapor into liquid.

A binary mixture of dry air and water vapor is known as:

In compressing air in water – jacketed air compressor, the power required to drive it

An instrument used in the study of the properties of air.

The difference between dry – bulb and wet – bulb temperatures.

The transmission of heat from one place to another by fluid circulation between spots of different temperature is called.

A machine or equipment used for drying process.

Water occurring when chemical component of the material changes its chemical composition by heat or other means is called.

A wet – type mechanical classifier (solids separator) in which solids settle out of the carrier liquid and are concentrated for recovery is known as:

A term used for describing the moisture in the mass that is not on tne surface of the material.

The main principle of the term drying process.

The common term for processes using only pressure, suction, or decantation.

The process of removing moisture in varying amounts from solid or semi – fluid materials; the process may be accomplished by pressure, suction, decantation, or evaporation.

A type of dryer that may have the flame from combustion impinging on the material being dried; or the gases of combustion may be mixed with additional air so that mixture in contact with the material is reduced in temperature.

The most commonly used dryer that consists of a rotating cylinder inside which the materials flow while getting in contact with the hot gases. The cylinder is tilted at right angle and fitted with lifting flights. This dryer is used for copra, sand, or woods chips.

A dryer where material is in contact with steam pipes or the air is passed over steam heaters and then over or through the material being dried.

A dryer that consists of a centrifuge revolving at high speed causing the separation, by centrifugal force, of the water from the material. This dryer is used for drying fertilizer, salt, and sugar.

A dryer type in which material to be dried is supported on a floor through which the hot gases pass. This dryer is used for copra, coal, and enamel wares.

Those substance that are particularly variable in the moisture content that they can possess at different times.

The hygroscopic moisture content of a substance expressed as a percentage of the bone-dry-weight of the material.

A dryer that consists of trays, carrying the materials to be dried, placed in a compartment or moving conveyor. This type of dryer is used for ipil-ipil leaves, and grains.

A type of dryer that consists of a vertical shaft in which the wet feed is introduced at the top and falls downward over baffles while coming in contact with the hot air that rises and exhaust at the top. This type of dryer is used for drying palay, wheat, and grains.

The temperature to which the air must be cooled at constant pressure to produce saturation is called:

The mass of water vapor per unit volume of air

When the expansion of compression of gas takes place without transfer of heat to or from the gas, the process is called:

Weight per unit volume is termed as:

The design of an air supply duct of an air conditioning system

Atmospheric pressure at sea level is:

Air contains by weight:

An instrument used to determine the specific gravity of a solution

The type of heat that changes the physical state of a substance

Refers to the temperature at which all molecular motion ceases according to the kinetic theory of heat.

One ton of refrigeration is a heat equivalent to:

Is one whose temperature is below the saturated temperature of one gram of water to one degree centigrade.

Weight per unit volume is termed as:

Measure of hotness or coldness of the body

The temperature at which the water vapor in the air begins to condensed, or the temperature at which the relative humidity of air becomes 100%.

It consists of a wet and dry bulb thermometers mounted on a strip of metal

A manometer is an instrument that is used to measure:

The relationship of water vapor in the air at the dew point temperature to the amount that should be in the air if the air were saturated at the dry-bulb temperature is:

Heat added to or removed from a substance that cause a change of temperature:

All of the following statements about wet bulb temperature are true, EXCEPT

In a sensible heating process, the final humidity ratio is:

In an adiabatic saturation process, the final relative humidity is:

Cooling and dehumidifying process is commonly used for.

An adiabatic saturation process is also known as:

The process of simultaneous heating and dehumidifying is known as:

The process of increasing the dry-bulb temperature without changing the humidity ratio is known as:

The process of simultaneous cooling and decreasing of humidity ratio is known as:

The process of cooling without changing the humidity ratio is known as:

The process of simultaneous heating and humidifying is known as:

The process of cooling and maintaining the temperature of space or material below its surrounding temperature.

The process of treating air so as to control simultaneously its temperature, humidity, cleanliness, and distribution to meet the requirement of the conditioned space.

An appliance used to dehumidify air in homes and buildings which uses refrigerant unit.

A component of vapor-compression refrigeration system which is used to compressed refrigerant vapor from evaporator to the condenser.

One of the components at the high-pressure side of vapor­-compression refrigeration system.

The thermal state of a body considered with reference to its ability to communicate heat to other bodies.

A form of energy that flows from higher temperature body to lower temperature body.

A thermodynamic quantity that measures the fraction of the total energy of a system that is not available for doing work.

The total volume of a mixture of gases is equal to the sum of the volumes that would be occupied by the various components each at the pressure and temperature of the mixture.

The total pressure of a mixture of gases is the sum of the pressures that each gas would exert were it to occupy the vessel alone at the volume and temperature of the mixture.

The ratio of the actual partial pressure of vapor and the saturation pressure of vapor corresponding to the actual temperature of the mixture.

A steady – flow process at total pressure through a control volume for which there is no heat, and in which, a liquid and the gas flowing through arrive at a local equilibrium state containing saturated vapor before the exit section is reached.

An instrument of two thermometers, one used to measure the dry – bulb temperature and the other one used to measure wet – bulb temperature of air.

The actual temperature of air which is measured by an ordinary thermometer, or the temperature of a gas or mixture of gases indicated by an accurate thermometer after correction for radiation.

The ratio of the mass of water vapor and the mass of dry air in the mixture.

The sum of the internal energy and the product of pressure and specific volume.

The temperature at which the condensation of water vapor in space begins.

The temperature of a moist air which is equal to the saturation temperature of the partial pressure of the vapor.

The ratio of the air humidity ratio to the humidity ratio of saturated air at the same temperature.

At constant temperature, the absolute pressure of a gas varies inversely as its volume.