AGRICULTURAL PROCESSING, STRUCTURES, ELECTRIFICATION, AND ALLIED SUBJECTS - Part 6

Oxidation of fats

Changes in the flavor of meat, fish, or poultry during freezing is due to the

Liquid spray freezing

It is a method of freezing the surface of poultry meat using mist of liquid prior to storage in an air blast freezer or cold storage room

1 to 2 days

If a poultry products is stored at a temperature of 35-40°F, the product quality can be maintained within

Meat

It is a flesh obtained from domesticated animals.

Pork

It is the meat obtained from hogs

Muttons

It is the meat of sheep that is less than one year old.

Lapan

It is the meat from rabbit

Smoking process, Refrigeration, Freeze drying, Irradiation

It is the method used in preserving meat.

Veal

It is a meat of less than one-year old cattle.

When beef is stored at lower temperature it will have longer storage life than when cold stored at higher temperature

Which of the a following is true?

Odor of meat after cold storage

Appearance of meat

Myoglobin content in meat is responsible for

Aging

It is the process of allowing meat to hang at temperature of 0 to 3°C to create tenderizing effect before freezing.

Extreme temperature fluctuation during defrosting contributes to short storage life of the meat

Which of the following is true in cold storage of meat?

Storing meat product without plastic sheet at low relative humidity

Freezer burn in meat product is a result of

6 to 12 months

The recommended time for storing beet cuts at -18°C is

3 to 4 months

Ground beef can be stored at -18°C within a period of

Immersion freezing

It is a method of freezing shrimp into an agitated cold brine solution of a fixed concentration and temperature

7 – 12 months

At -18°C scallop meat have a frozen storage life of

American Society of Heating, Refrigerating, and Air Conditioning Engineers

ASHRAE is the acronym for

Air conditioner

An equipment that is used to clean, cool, heat, humidify, or dehumidify air

Dehumidify

The process of removing moisture from air

R-12 (Dichlorodifluoromethane)

It is the most popular refrigerant used for refrigeration system.

R-502 (mixture of R-22 and R-115)

A popular refrigerant for low temperature refrigeration systems.

Air conditioning

It is the process by which air is cooled, cleaned, and circulated

Split-system air conditioning system

Air conditioning system wherein the condenser is located separately from the evaporator and uses an interconnecting refrigerant lines.

evaporator

It is the cooling equipment of air conditioner.

Increasing the condenser surface area

Condenser efficiency of an air conditioner can be increased by

40°F

Operating temperature of evaporator in an air-conditioning system

Hot temperature with high humidity

Refrigerated-air conditioning is used in

battery, thermocouple, generator

It is the source of electrical pressure

75%

Percentage energy conversion of an average farm electric motor

power

It is the rate of converting energy

branch circuit

It is the portion of electric conductor that extends from service-entrance switch to a certain group of outlets or to a single outlet.

circuit breaker

A device use to protect branch circuit form overloading.

fuse

Another term used for circuit breaker

receptacle

An item commonly referred to as convenient outlet

electrical load

It is the number of wattage required by an electrical equipment in use in the building

3 watts/ft2 + 1320 watts/hp each motor

The minimum load design value for feeder-line and service-entrance switch for general purpose barn

Electric load center

It is the centroidal point of the electric system

a. Size of wire to safely carry the current

b. Type and location of wire adapted to its surrounding

c. Size of wire to prevent excessive pressure loss or voltage drop

Factors to consider in selecting feeder lines

Feeder line

The wire that is extending from the distribution center to the consumer property.

The arc of a circle which has a diameter of 1/1000 of an inch

A circular mill refers to

voltage drop

It is the amount of electrical pressure used not to advantage

foot-candles

The unit used when specifying the intensity of light needed for various seeing task.

room index

It is the ratio of the quantity in working place to the quantity of light output from the source.

switch

Electrical equipment used to open and to close a circuit

relay

A type of switch having contacts which are operated by magnetism

solenoid valve

It is an electrically-controlled switch for regulating the flow of liquid or of gas

thermostat

A special kind of switch used to control temperature.

Float switch

It is an automatic switch used to control the level of liquid

limit switch

An electrical switch that controls the movement of some other pieces of materials or machines such as the travel of rope, chain, or carriage

1700 – 1750 rpm

Most common electric motor speed

Service factor

An allowable overload for a motor indicated by a multiplier that when applied to a normal horsepower rating indicates the permissible loading

Transducer

An electrically-operated device that converts one type of energy into another type

solenoid

A magnetic device used to convert electrical energy into linear motion

Transformer

An electrical device that changes one value of AC voltage into another value

Repulsion start induction motor

A motor that develops more starting torque and is best suited for hardest-to-start load.

Split-phase motor

A motor adapted for load that are easy to start such as centrifugal pumps, bench grinder, and others.

Parallel connection

Wiring connection used for lights on small appliance in farm buildings

In series

When the current is the same throughout all the parts of the circuit, the circuit line is

Thermostat

A temperature-response mechanism used to control heating system and cooling system with the object of monitoring certain temperature without further personal attention

DC

A current which, when flowing through a given resistance, is practically unvarying and going in one direction only.

Electric motor

A rotating machine that converts electrical power into mechanical power.

Generator

A rotating machine that converts mechanical power to electrical power

Demand factor

The ratio of the maximum demand power to the total connecting load.

Load factor

The ratio of the average load to the maximum demand of a system.

Power factor

The ratio of the true power to the apparent power.

Resistance

The property of the material that prevents the flow of current and at the same time electrical energy is converted into heat.

Inductance

The property of an electrical circuit which opposes a change in current. It is also referred to as the fly-wheel effect of an electric circuit.

Capacitance

The property of an electric circuit that enables it to store an electric charge.

Henry

The practical unit of inductance

Farad

The practical unit of capacitance

Impedance

The ratio of the applied voltage to the resultant steady-state current

Cyclometer type

Type of kilowatt-hour meter that is read exactly in like manner as the mileage indicator of the automobile.

Pointer-dial type

A kilowatt-hour meter with four dials and each dial is calibrated in opposite direction and dial readings from left to right give thousands, hundreds, tens, and single units of kilowatt-hour respectively.

Electric load

The number of watts required for an electrical equipment in used in building.

Outdoors

Type of distribution center where the kilowatt-hour meter and the disconnect-switch are located outside of one of the buildings

Pole type

Type of distribution center where the meter and the disconnect switch are located on a main distribution pole.

Voltage drop

It refers to a certain amount of electrical pressure or volts used but not to advantage

To drive the load at proper speed

To withstand the “abuse” of its surroundings

To start the load

Which of the following are the motor’s jobs

Single phase

Classification of AC motors according to power source with a single set of windings and 1 slip ring which produces single wave of voltage

Poly phase

Classification of AC motors according to power source with three sets of windings and 3 slip ring which produces three waves of voltage.

Synchronous

Classification of AC motors according to principles and characteristics of operation that runs at an exact speed for all loads up to the pull-out point.

Series

Classification of AC motors according to principles and characteristics of operation that provides good starting torque, good running torque, variable speed and approximately constant Hp output.

Induction

Classification of AC motors according to principles and characteristics of operation that runs at constant speed, variable torque, variable Hp, average power factor and average efficiency.

Switch

The most basic of all electrical controls and its purpose is to open and to close an electric circuit or to start and to stop the flow of electricity.

Relays

A type of switch having contacts that is operated by magnetism.

Magnetic-starting switch

It protects the motor due to its built-in overload device that automatically trips the switch in case too much current will flow to the motor

Motor-starting switch(?)

This switch incorporates into one unit the principles of the relay coil, the overload heater and strips, and the pushbutton control.

Reduce-voltage switch

It reduces the voltage to the motor when the motor is starting and applies the full voltage when the motor has gained sufficient speed

Solenoid valve

This type of control is operated by electricity but it is used to control the flow of water, oil or gas.

Thermostat

Special kind of switch that must open and close automatically in response to changes in temperature.

Bellows thermostat

This type of thermostat is used for heating or cooling but the switch contacts are operated by the action of the bellows

Bimetallic thermostat

This thermostat makes use of two unlike metals that do not expand in the same amount.

Wafer thermostat

A type of thermostat is composed of two hollow metal discs, the switch and its contacts, and a frame for holding the parts in place.

Time switch

A type of switch has an electric clock that automatically operates switch contacts at definite time intervals.

Limit switch

Type of switch that is useful in farm applications and is desired to limit the travel of rope, chain or carriage.

Pressure switch

An automatic control having switch contacts which are operated according to various gas or liquid pressure.

Electricity

An invisible agent that produces such effects such light, heat, power, and sound.