PPT 2 Flashcards
Those materials that offer very little resistance or opposition to current.
a. Lamp
b. Conductor
c. Electricity
d. None of the above
b. Conductor
A negative charge of electricity that is held within the orbit of the atom by the attraction of a positively-charged protons.
a. Volt
b. Electrons
c. Current
d. None of the above
b. Electrons
It is also known as the pressure and its causes electron movement.
a. Volt
b. Electron
c. Current
d. None of the above
a. Volt
It is the movement of electrons and is measured in amperes.
a. Volt
b. Electron
c. Current
d. None of the above
c. Current
The electric current flowing in a circuit varies directly with the electrical pressure and inversely with the opposition.
a. Ohm’s law
b. Current law
c. Current
d. None of the above
a. Ohm’s law
Transmission lines that begin from a sub-station and extends out over the countryside.
a. Service wires
b. Service drop line
c. Distribution line
d. None of the above
c. Distribution line
Wire connecting the post to home.
a. Service wires
b. Service drop line
c. Distribution line
d. None of the above
b. Service drop line
It is the actual power used by the circuit and is expressed in watts.
a. Apparent power
b. True power
c. Power
d. None of the above
b. True power
Power obtained by ignoring the fact that the current and the voltage are out-of-phase and is expressed in volt-amperes.
a. Apparent power
b. True power
c. Power
d. None of the above
a. Apparent power
Which of the following are major factors in determining the rotor speed of the induction motor.
a. Number of poles
b. Frequency
c. Load
d. All of the above
d. All of the above
Which of the following are reasons why polyphase power supply is superior to single-phase supply?
a. 3-phase supply uses less amount of copper
b. It can supply higher power requirements
c. It can be used for motors having ratings of more than 7 ½ Hp
d. All of the above
d. All of the above
The most commonly recommended type of motor enclosure for farm application.
a. Splash proof
b. Open drip proof
c. Explosion proof
d. None of the above
a. Splash proof
The recommended foot-candles for rough work like wood working, foundry and storage work is:
a. 30 – 50
b. 50 – 80
c. 80 – 110
d. None of the above
b. 50 – 80
The government office responsible for organizing electric cooperatives in the rural areas.
a. Cooperative Development Authority
b. National Power Corporation
c. National Electrification Administration
d. None of the above
c. National Electrification Administration
Lighting method where the light source is relatively close to work, such as desk lamp or a lamp over a bench.
a. Local lighting
b. General lighting
c. Combination lighting
d. None of the above
a. Local lighting
Which of the following are the factors affecting wire resistance.
a. Length
b. Cross-sectional area
c. Material
d. All of the above
d. All of the above
Light source arrangement that is designed to supply a fairly uniform light intensity over large areas.
a. Local lighting
b. General lighting
c. Combination lighting
d. None of the above
b. General lighting
The ratio of the quantity of light in the working place to the quantity of light output from the source.
a. Room index
b. Coefficient of utilization
c. Lumens
d. None of the above
b. Coefficient of utilization
The quantity of heat required to raise the temperature of one pound of water by one degree Farenheight
a. Btu
b. Lumen
c. Foot-candle
d. None of the above
a. Btu
The basic photovoltaic device which generates electricity when exposed to light.
a. Solar cell
b. Photovoltaic module
c. Panel
d. None of the above
a. Solar cell
A collection of modules mechanically fastened together, wired, and designed to provide a field installable unit.
a. Solar cell
b. Photovoltaic module
c. Panel
d. None of the above
c. Panel
The smallest complete, environmental protected assembly of solar cells, exclusive of tracking, designed to generate direct-current power under sunlight.
a. Solar cell
b. Photovoltaic module
c. Panel
d. None of the above
b. Photovoltaic module
A mechanically integrated assembly of modules or panels with support structure and foundation, tracking, thermal control and other components as required, to form a direct-current power requirement unit.
a. Solar panel
b. Solar module
c. Array
d. None of the above
c. Array
A wind machine that converts wind kinetic energy into useful electrical energy.
a. Wind pump
b. Wind turbine
c. Turbine
d. None of the above
b. Wind turbine
Which of the following are types of solar cell?
a. Monocrystalline
b. Polycrystalline
c. Thin-film
d. All of the above
d. All of the above
Which of the following is the component of the wind generating system?
a. Rotor
b. Inverter
c. Transformer
d. None of the above
a. Rotor
Which of the following is a component of the utility-connected system?
a. Rotor
b. Inverter
c. Transformer
d. None of the above
a. Rotor
Type of wind turbine in which the generator shaft and the axis of rotation are parallel to the wind direction.
a. Vertical axis
b. Horizontal axis
c. Cross axis
d. None of the above
b. Horizontal axis
Type of wind turbine where the axis of rotation is perpendicular to the wind direction.
a. Vertical axis
b. Horizontal axis
c. Cross axis
d. None of the above
______ axis
Materials that have very few, if any, free electrons and are referred to as non-conductors.
a. Insulator
b. Wires
c. Current
d. None of the above
a. Insulator
It is measured by kilowatthour meter.
a. Electric current
b. Electricity
c. Electric energy
d. None of the above
c. Electric energy
A machine which changes the amount of voltage from one value to another.
a. Generator
b. Transformer
c. Turbine
d. None of the above
b. Transformer
It provides the equipment manufacturers with a means of conveying to the customer the rated electrical value and output capacities of the equipment.
a. Manual
b. Operation guide
c. Nameplate data
d. None of the above
c. Nameplate data
Method of determining watts and kilowatthours where the revolution and the Kh factor of the regular kilowatthour meter are considered.
a. Meter method
b. Meter-disk revolution method
c. Nameplate data
d. None of the above
b. Meter-disk revolution method
They refer to the two posts of a battery.
a. Terminals
b. Nodes
c. Poles
d. None of the above
a. Terminals
Kind of circuit where the current that flows through one appliance does not flow through the other appliances
a. Series
b. Parallel
c. AC-DC
d. None of the above
b. Parallel
Kind of circuit where the current that flows through one appliance does not flow through the other appliances.
a. Series
b. Parallel
c. AC-DC
d. None of the above
b. Parallel
Two twenty (220) volt line with current flowing at 10 amperes equal to
a. 2.2 kw
b. 2.2 volts ampere
c. 2220 watts
d. None of the above
a. 2.2 kw
A 10 ampere ventilation fan with a power factor of 0.85 was connected to a 220 volt convenience outlet. What is the power in the circuit?
a. 1,870 watts
b. 1,870 volt ampere
c. 2,200 watts
d. None of the above
a. 1,870 watts
An electric motor has a rated horsepower of 2 hp, a rated voltage of 240 volts, and a current of 15 amperes. What is the horsepower rating of the motor in watts? Assume a motor efficiency of 85%.
a. 1,492 watts
b. 1,942 watts
c. 1,249 watts
d. None of the above
a. 1,492 watts
What is the input power of the motor above?
a. 1557 watts
b. 1755 watts
c. 1575 watts
d. None of the above
b. 1755 watts
What is the power factor of the motor above?
a. 0.4875
b. 0.4785
c. 0.4587
d. None of the above
a. 0.4875
The power output of DC line in wattage is equal to______
a. Volts x ampere
b. Volts x ampere x power factor
c. Volts x ampere x efficiency
d. None of the above
a. Volts x ampere
Advantage of 240 volts over 120 volts
a. Economical
b. Lower power loss
c. Small power drop
d. All of the above
d. All of the above
The power output of AC line in wattage is equal to ______
a. Volts x ampere
b. Volts x ampere x power factor
c. Volts x ampere x efficiency
d. None of the above
b. Volts x ampere x power factor
Ampere capacity of AWG no. 12 wire.
a. 15 amperes
b. 20 amperes
c. 30 amperes
d. None of the above
b. 20 amperes
When AWG no. 12 wire is replaced with AWG no. 14, the ampere capacity will ______
a. Increase
b. Decrease
c. Remain the same
d. None of the above
b. Decrease
Electrical conductors which are 8 mm2 (AWG #8) or smaller in size.
a. Wire
b. Cables
c. Cord
d. All of the above
a. Wire
Consist of group of wires twisted to from a metallic string
a. Stranded wire
b. Cord
c. Co-axial wire
d. None of the above
a. Stranded wire
Electrical conductors larger than 8 mm2
a. Wire
b. Cables
c. Cord
d. All of the above
A water heater draws 10 amperes at 240 volt current supply. What is the heat resistance delivered by heater
a. 2.4 ohms
b. 24 ohms
c. 2400 ohms
d. None of the above
b. 24 ohms
What is the size in circular mill of a cable with rating 250 MCM?
a. 250 circular mill
b. 25,000 circular mill
c. 250,000 circular mill
d. All of the above
c. 250,000 circular mill
Determine the monthly consumption of a farm residence having the following loads. One – 1200 watts electric iron in 2 hours, one 1000-watt water heater in 3 hours and one 1300-watt toaster in 30 minutes.
a. 4.05 kw-hr
b. 5.05 kw-hr
c. 6.05 kw-hr
d. None of the above
c. 6.05 kw-hr
It is a fabricated assembly of insulated conductors enclosed flexible metal sheet primarily used for both exposed and concealed work.
a. Metal clad cable
b. Armored cable
c. Mineral insulated cable
d. None of the above
b. Armored cable
It is factory assembly of one or more conductors each individually insulated and enclosed in a metallic sheet of interlocking tape of a smooth or corrugated tube and are used for service feeders, branch circuits and for indoors or out door work.
a. Metal clad cable
b. Armored cable
c. Mineral insulated cable
d. None of the above
a. Metal clad cable
It is a wiring accessories or channels designed for holding wires, cables or bus bars which are either made of metal, plastic or any insulating materials.
a. Wire shield
b. Armor pipe
c. Raceways
d. None of the above
c. Raceways
It is a device which by insertion establishes connection between the conductor of the flexible cord and the conductors connected permanently to the receptacle.
a. Convenience outlet
b. Junction box
c. Receptacles
d. None of the above
a. Convenience outlet
A contact device installed at the outlet for the connection of a single attachment plug
a. Convenience outlet
b. Junction box
c. Receptacles
d. None of the above
c. Receptacles
There are free standing assembly of switches, fuses and circuit breakers which provides switching and feeder protection to a number of circuits connected to a main source.
a. Panel board
b. Switch board
c. Circuit breakers
d. None of the
______
Electrical system that adopted in buildings where the load exceeds 50 kva or where it is required for bigger load such as motors and machinery.
a. Single phase system
d. Dual phase system
c. Three phase system
d. None of the above
c. Three phase system
The maximum load in watts for each household lighting outlet based on the National Electrification Code.
a. 50 watts
b. 100 watts
c. 150 watts
d. All of the above
b. 100 watts
National Electrification Code provides that the ampacity of the connected load shall not exceed ___ of the amperage capacity of the conductor and the fuse.
a. 60%
b. 70%
c. 80%
d. All of the above
c. 80%
It is the ability of the wire or conductor to carry the current without overheating
a. Voltage drop
b. Power loss
c. Ampacity
d. None of the above
c. Ampacity
It is the process of the decomposition of carbohydrates by microorganism or enzyme.
a. Fermentation
b. Spoilage
c. Preservation
d. None of the above
a. Fermentation
It is the preservation of food in brine or vinegar with or without bacterial fermentation.
a. Pickling
b. Salting
c. Blanching
d. None of the above
a. Pickling
A pretreatment procedure to keep the color and quality of vegetable before drying.
a. Trimming
b. Blanching
c. Salting
d. None of the above
____
It is the process of boiling whole fruits or pieces of fruit pulp with sugar to a moderate thick consistency, without retaining the shape of the fruit.
a. Jams
b. Jellies
c. Marmalades
d. All of the above
a. Jams
It is a product prepared by extracting the juice from boiled fruits and then boiled with sugar and cooked to such consistency that gelatinized takes place when cooled.
a. Jams
b. Jellies
c. Marmalades
d. All of the above
b. Jellies
It is a clear jelly which contains evenly suspended slices of fruits or peel.
a. Jams
b. Jellies
c. Marmalades
d. All of the above
_______
It is aseptic practice in the preparation, processing, and packaging of food products.
a. Cleaning
b. Sanitation
c. Housekeeping
d. None of the above
b. Sanitation
Substances that modify surface tensions in the component phase of an emulsion to establish a uniform dispersion.
a. Additives
b. Antioxidants
c. Emulsifiers
d. None of the above
c. Emulsifiers
Substances used to prevent food by retarding deterioration, rancidity or discoloration due to oxidation.
a. Additives
b. Antioxidants
c. Emulsifiers
d. None of the above
b. Antioxidants
Any substance including a food additives used as a component in the manufacture or preparation of a food and present in final product.
a. Nutrients
b. Micronutrients
c. Ingredients
d. None of the above
_______
Any tag, brand, mark, pictorial or other descriptive matter, written, printed, marked, embossed or impressed on or attached to a container of food.
a. Nutrient facts
b. Label
c. Trademark
d. None of the above
b. Label
Canning temperature for low acid vegetable, meat and poultry in pressure canner.
a. 115 deg°C
b. 100 deg°C
c. 74 deg°C
d. None of the above
a. 115 deg°C
Canning temperature for fruits, tomatoes and pickles in water bath caner.
a. 115 deg°C
b. 100 deg°C
c. 74 deg°C
d. None of the above
b. 100 deg°C
A refrigerated system that cleans, dehydrates and cools a compartment.
a. No frost refrigerator
b. Chiller
c. Air conditioner
d. None of the above
c. Air conditioner
Which of the following statement is true
a. The motor and compressor of the refrigeration system is separately installed
b. The motor and compressor of the refrigeration system is housed in the same compartment
c. The motor and compressor of the refrigeration system is non hermetic type
d. None of the above
b. The motor and compressor of the refrigeration system is housed in the same compartment
The refrigeration system component after the condenser.
a. Capillary tube
b. Filter
c. Compressor
d. None of the above
b. Filter
The highest pressure in the refrigeration system can be found at ____
a. The capillary tube
b. Entrance of the condenser tube
c. Entrance of the evaporator coil
d. Evaporator coil immediately before the compressor
e. None of the above
b. Entrance of the condenser tube
The refrigeration system component before condenser.
a. Filter
b. Evaporator
c. Capillary tube
d. Compressor
e. None of the above
d. Compressor
State of refrigerant at the evaporator side immediately after leaving the compressor.
a. Superheated gases
b. Lukewarm liquid
c. Saturated gas
d. None of the above
a. Superheated gases
The refrigeration system component after the capillary tube.
a. Evaporator
b. Compressor
c. Condenser
d. None of the above
a. Evaporator
Lowest temperature zone in the refrigeration system.
a. Condenser
b. Capillary tube
c. Evaporator
d. None of the above
c. Evaporator
When a condenser of a refrigeration system is not cooling, what is the common trouble?
a. Too much refrigerant
b. Lacks refrigerant
c. No refrigerant
d. None of the above
b. Lacks refrigerant
A newly discovers refrigerant that is not harmful for ozone layer or referred to as “ozone friendly gas”
a. R12
b. Ammonia
c. Suva Mp 52 (r-134a)
d. All of the above
c. Suva Mp 52 (r-134a)
It is term used for the overcharging of refrigerant.
a. Back frost
b. Sweating
c. Supercharging
d. None of the above
a. Back frost
State of refrigerant at the evaporator side immediately before the compressor.
a. Superheated gas
b. Lukewarm liquid
c. Saturated gas
d. None of the above
c. Saturated gas
Charging pressure for refrigerator and freezer using R-12 refrigerant.
a. 19 psi
b. 65 psi
c. 75 psi
d. None of the above
a. 19 psi
A dry ice is
a. Solid H2O
b. Solid CO2
c. Solid O2
d. None of the above
b. Solid CO2
It is a mixture of ½ vapor and ½ liquid.
a. Saturated gas
b. Saturated liquid
c. Superheated gas
d. None of the above
a. Saturated gas
It is a mixture of ½ gas and ½ liquid
a. Saturated gas
b. Saturated liquid
c. Superheated gas
d. None of the above
b. Saturated liquid
A device used mostly in larger cooling units to cool the water that absorbs the heat from the condenser
a. Cold storage room
b. Cooling tower
c. Heat exchanger
d. None of the above
b. Cooling tower
Known as dichlorodifluoromethane used as primary refrigerant for refrigerator
a. R-11
b. R-12
c. R-22
d. None of the above
b. R-12
It is the passage of from the outside of a leaky room caused by cracks in windows, doors, and other possible sources
a. Heat loss
b. Air infiltration
c. Air gap
d. None of the above
b. Air infiltration
Known as monochlorodifluoromethane used as primary refrigerant for airconditioner
a. R-11
b. R-12
c. R-22
d. None of the above
c. R-22
It is the process of compressing mash feeds with the aid of live steam to produce small chunks or cylinders of feed
a. Mixing
b. Crumbling
c. Pelleting
d. None of the above
It is the process of grinding pellets into course granular from
a. Coarse pelleting
b. Crumbling
c. Milling
d. None of the above
b. Crumbling
