WEEK 2 PART 3 Flashcards by Rai Olino

Solid salt (NaCl) crystals in a saturated NaCl-water solution is an example of:
A. Thermal equilibrium
C. Phase equilibrium
B. Mechanical equilibrium
D. Chemical equilibrium

C. Phase equilibrium

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An object that has a uniform temperature distribution is considered:
A. In a state of thermal equilibrium
C. In a state of phase equilibrium
B. In an isobaric condition
D. In a state of chemical equilibrium

A. In a state of thermal equilibrium

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A double-pipe heat exchanger consists of a pipe located concentrically inside a main pipe; this is known as a:
A. Calandria
B. Shell-and-tube heat exchanger
C. Tubular heat exchanger
D. Scraped-surface heat exchanger

C. Tubular heat exchanger

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Any region prescribed in space or a finite quantity of matter enclosed by a boundary, where there is no exchange
of heat, mass, or work, is called:
A. Adiabatic system
B. Isolated system
C. Isothermal system
D. Steady-state system

B. Isolated system

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This term refers to the transfer of harmful micro-organisms from one food product to another product through
non-food surfaces:
A. Cross-contamination
B. Infection
C. Reworking
D. Bacteria

A. Cross-contamination

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Fourier’s Law for Heat Conduction states that heat flowing through a wall is directly proportional to the surface
area, and inversely proportional to the thickness. The driving force for conductive heat transfer is the:
A. Difference in thermal conductivity between the two surfaces of the wall
B. Difference in thermal diffusivity between the two surfaces of the wall
C. Temperature difference between the two surfaces of the wall
D. Vapor pressure difference between the two surfaces of the wall

C. Temperature difference between the two surfaces of the wall

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The last line of defense in a food safety emergency is:
A. Traceability
B. Lawsuits against food manufacturers
C. Product recall
D. GMP

C. Product recall

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Liquids that show a direct proportionality between shear rate and shear stress are classified as:
A. Rheopectic
C. Bingham
B. Newtonian
D. Shear-thickening

B. Newtonian

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Thermal diffusivity can be considered as:

A. The ability of a material to conduct thermal energy relative to its ability to store thermal energy
B. The ability of a material to conduct thermal energy relative to its ability to transmit thermal energy
C. The ability of a material to store thermal energy without changing phase
D. The ability of a material to transmit thermal energy under constant temperature

A. The ability of a material to conduct thermal energy relative to its ability to store thermal energy

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Conventional testing of food quality at the point of consumption is not effective because:
A. Only QA / QC personnel are responsible for food safety C. Control of food hazards is reactive
B. Food safety is only ensured at the point of testing
D. All of these

D. All of these

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To keep processing and preparation areas cold and dry, it is important for the airconditioning and refrigeration
system to maintain the specified air temperature and:
A. Enthalpy
B. Specific volume
C. Dewpoint temperature
D. Relative humidity

C. Dewpoint temperature

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The actual dry bulb temperature from an evaporative cooler is 21 °C. If the outside air has dry bulb temperature
of 35°C and wet bulb temperature of 18.9 °C, determine the efficiency of the evaporative cooler.
A. 88 %
B. 87 %
C. 85 %
D. 84 %

B. 87 %

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A rice miller buys 100 ton of dried and clean palay at P25/kg. Assuming that the cost of operation is P8/kg milled
rice, how much should he sell (P/kg) to break-even? Neglect by-products and assume milling recovery of 64%:
A. 33.00
B. 39.06
C. 47.06
D. 51.56

C. 47.06

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The process of planning expenditure that will influence the operation of a processing plant over a number of years
is called:
A. Capital budgeting
B. Net present valuation
C. Dividend valuation
D. Investment

A. Capital budgeting

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Which is known as corrective maintenance?
A. Breakdown maintenance
B. Preventive maintenance
C. Predictive maintenance
D. Scheduled maintenance

A. Breakdown maintenance

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Local velocity is measured by:
A. Pitot tube
B. Orifice plat
C. Vena contrata device
D. Venturi tube

A. Pitot tube

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The closeness with which the reading of an instrument approaches the true value of the variable being measured
is called:
A. Accuracy
B. Precision
C. Resolution
D. Sensitivity

A. Accuracy

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If the efficiency of a process is high, what should be low?
A. Input power
B. Losses
C. kWh consumed
D. True component of power

B. Losses

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The most abundant constituents in fresh fruits and vegetables is water, which exists as a continuous liquid phase
within the fruits and vegetables. The process by which fresh fruits and vegetables lose some of this water is called:
A. Dry matter loss
B. Respiration loss
C. Transpiration loss
D. Shriveling loss

C. Transpiration loss

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Determine the quantity of palay, in kilogram, at 30% wet basis required to produce 1 metric ton at 16% dry basis.
A. 833
C. 1,230
B. 1,200
D. 1,875

C. 1,230

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The graphic representation of all the processing activities occurring on the plant is called.
A. Flow process chart
C. Operation process chart
B. Production chart

A. Flow process chart

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Which of the following is a direct cost of accident?
A. Compensation paid to the worker
B. Cost of lost time of the injured worker
C. Money paid for the treatment of the worker
D. Template
D. Money paid for the treatment and compensation paid to the worker

D. Money paid for the treatment and compensation paid to the worker

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What is food security?
A. It relates to efforts to prevent terrorism from poisoning food supplies
B. It is about ensuring everyone’s access to food
C. Its component elements include availability, utilization, and ststability, as well as access
D. Food security focuses on ending micronutrient malnutrition

C. Its component elements include availability, utilization, and st

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When a granular material is permitted to flow from a point into a pile, the shape of the pile is characteristic of the
material. The angle which the side of the pile makes with the horizontal is called.
A. Angle of friction
B. Angle of hopper
C. Angle of repose
D. Slope

C. Angle of repose

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Which among the following is the most appropriate reason for storing green mango at low temperature? A. Respiration and photosynthesis are completely inhibited B. The rate of respiration and photosynthesis are reduced C. The rate of photosynthesis is reduced D. The rate of respiration is reduced

D. The rate of respiration is reduced

Dough kept overnight in warm place becomes soft and spongy due to: A. Absorption of CO2 C. Fermentation B. Cohesion D. Osmosis

C. Fermentation

Maximum moisture content for safe storage in palay seed is: A. 10 C. 14 B. 12 D. 18

B. 12

When the vapor pressure of water held by the grain is equal to the vapor pressure of the surrounding air, no moisture transfer occurs and there exists moisture equilibrium between the grain and the air. If, however, the vapor pressure of the water held by the grain is greater than the vapor pressure of the air, then what condition exists? A. Absorption B. Adsorption C. Desorption D. Hysteresis

C. Desorption

9. A solid sphere of radius R is falling through a viscous medium. The terminal velocity attained by the falling body will be proportional to? A. R2 B. R C. 1/R D. 1/R2

A. R2

Supposing the purity of a seed sample is 80%, and viability is 90%. What will be the pure live seed? A. 62 B. 72 C. 80 D. 90

B. 72

Determine the fineness modulus for the following sieve analysis: Mesh/percent retained: 3/8: 2%, mesh 4: 6%, mesh 8: 10%, mesh 14: 40%, mesh 28: 28%, mesh 48: 12%, mesh 100: 2%, Pan: 0%? A. 1.8 B. 3.12 C. 3.70 D. 4.00

C. 3.70

Reduction of grain into meal or flour, including size reduction, hulling, scarifying, polishing, sorting, mixing is called A. Cutting B. Crushing C. Milling D. Grinding

C. Milling

Handling device that has a high mechanical efficiency. Minimum damage to products being transported. Carrying capacity is high. Materials can be conveyed over long distances. A. Belt conveyor B. Screw conveyor C. Chain conveyor D. Pneumatic conveyor

A. Belt conveyor

Factors considered in determining the type of rice harvesting system. A. Availability of labor C. Lodging of crop B. Shattering losses D. Timeliness of harvest

A. Availability of labor

The purpose of supply chain management is to: A. Integrate supply and demand management B. Provide customer satisfaction C. Improve quality of the product D. Increase production

A. Integrate supply and demand management

Cold storage facilities should be inspected regularly to spot problems early, so that preventive maintenance can be performed in time to avert serious damage. Which of the following does not affect building dimensions change? A. Condensation and/or leaks B. Temperature change C. Product capacity D. Settling

C. Product capacity

Refrigeration load calculation is performed to determine the proper size of the equipment required to provide cooling, to effectively operate the system, and to estimate operating costs. Design calculation where both magnitude and occurrence are considered is called: A. Peak load calculation B. Maximum load calculation C. Hour-by-hour calculation D. Diversity load calculation

C. Hour-by-hour calculation

What is the disadvantage of manual refrigerator defrosting? A. More electrical consumption C. Takes too much time B. Fast frosting D. Might damage the evaporator coil

C. Takes too much time

A guava with an average mass of 0.15 kg and average specific heat of 3.65 kJ/kg.C is cooled from 30°C to 5°C. The amount of heat transferred from the guava is: A. 13.7 kJ B. 15.7 kJ C. 16.4 kJ D. 25.5 Kj

A. 13.7 k

Which of the following is not usually considered in refrigeration facility design? A. Length of air blow and impingement on stored product B. Microorganisms present in the product C. Product entering temperature D. Uniformity of temperatures

B. Microorganisms present in the product

A glass of water with a mass of 0.3 kg at 30°C is to be cooled to 4°C by dropping ice cubes at 0°C into it. The latent heat of fusion of ice is 334 kJ/kg, and the specific heat of water is 4.18 kJ/kg.C. The amount of ice that needs to be added is: A. 32.6 g B. 93.0 g C. 97.6 g D. 1,949 g

B. 93.0 g

A refrigerator is removing heat from a cold medium at 4°C at a rate of 7200 kJ/h and rejecting the waste heat to a medium at 30°C. If the coefficient of performance of the refrigerator is 3, the power consumed by the refrigerator is: A. 18.8 W B. 667 W C. 2,400 W D. 6,000 W

B. 667 W

What is the most common food pathogen, with fast growth rates and a prime cause of spoilage especially in refrigerated, moist foods? A. Bacteria B. Yeast C. Molds D. Viruses

Bacteria

Consider the adiabatic mixing of two air streams with the same mass flow rate. The state of the mixture on the psychrometric chart is: A. Middle point on the straight line connecting the two states B. Middle point on the constant enthalpy line between saturation and average air temperature C. Point on the constant enthalpy line intersecting the saturation line D. Point on the constant wet bulb temperature line interacting the saturation line

A. Middle point on the straight line connecting the two states

5. A device where two moving fluid streams exchange heat without mixing is called: A. Blender C. Heat exchanger B. Diffuser D. Nozzle

C. Heat exchanger

. The mass of water vapor present in 1 kg of dry is called: A. Absolute humidity B. Relative humidity C. Humidity ratio D. Specific humidity

C. Humidity ratio

Consider the flow of a fluid in a stationary pipe. The fluid in motion comes to a complete stop at the surface and assumes a zero-velocity relative the surface. This is known as the no-slip condition and it is due to the: A. Fluid friction B. Fluid viscosity C. Fluid temperature D. Surface temperature

B. Fluid viscosity

he dimensionless number used in mass transfer that represents the ratio of the convective mass transfer to the rate of diffusive mass transport ie is: A. Lewis number B. Schmidt number C. Rayleigh number D. Sherwood number

. Sherwood number

Steam at T = 320°C flows in a cast iron pipe (k = 80 W/m.C) whose inner and outer diameters are D1 = 5 cm and D2 = 5.5 cm, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/m.C. Heat is lost to the surroundings at T = 30°C, with a heat transfer coefficient of ho = 18 W/m2.C. Taking the heat transfer coefficient inside the pipe to be hi = 60 W/m2.C, determine the rate of heat loss from the steam per unit length of the pipe: A. 2.2 W/m B. 17.7 W/m C. 111.2 W/m D. 188.2 W/m

C. 111.2 W/m

. Exergy is availability or available work. It is the combination of the first and second law of thermodynamics. As the ambient temperature increases, exergy: A. Decreases B. Remains the same C. Increases D. May decrease or increase

A. Decreases

Global warming potential of methane: A. 25 B. 1 C. 298 D. 1180

A. 25

In the design of anaerobic lagoons, this is the volume needed to maintain sustainable biological activity in the waste treatment system: A. Minumum treatment volume B. Sludge volume C. Waste volume D. Sludge accumulation ratio

A. Minumum treatment volume

Which of the following is not included as waste volume in the design of anaerobic lagoons: A. Manure volume B. Clean water volume C. Wastewater volume D. Sludge volume

. Sludge volume

A compost mixture is to be formulated using the following ingredients: 1.5 kg of grass (65% MCwb), 2 kg of leaves (20% MCwb), and 3 kg of food scraps (90% MCwb). What is the moisture content of the resulting mixture? A. 55% B. 62% C. 76% D. 84%

B. 62%

Determine the total volume of cylindrical anaerobic digester for dairy cattle production with 150 heads and 8.93 kg of manure per head per day with a total solid content of 1.16 kg per head per day. The reactor influent has 5% total solids (wet basis), manure density is about 1 L/kg, and hydraulic retention time is about 30 days. A. 105 m3 C. 108 m3 B. 100 m3 D. 110 m3

A. 105 m3

Recommended retention time of liquid swine manure for anaerobic digestion. A. 25 days C. 30 days B. 40 days D. 60 days

A. 25 days

According to PAES 412-2, the height of the windrows for composting should be: A. 0.5-0.8 m C. 1-2 m B. 0.8-1 m D. 2-5 m

C. 1-2 m

Which contributes the most greenhouse gas emission from Philippine agriculture. A. Rice cultivation C. Agricultural soils B. Enteric fermentation D. Manure management

A. Rice cultivation

Which of the following is not a treatment process that separates liquid waste material from the solid waste materials: A. Grit chamber B. Centrifugation C. Composting D. Settling basin

C. Composting

0. Which of the following is not a consideration for the design of a cattle waste management system? A. Characteristic of waste C. Environment B. Social concern D. None of these

D. None of these

A function of waste management that serves to reduce the pollution potential of the waste. A. Utilization C. Storage B. Collection D. Treatment

D. Treatment

What is the terminal settling velocity of spherical solid particles with specific gravity of 2.4 and average diameter of 0.05 mm in water at a temperature of 15℃ (μ = 1.138x10-3 Ns/m2)? A. 0.0017 m/s B. 0.017 m/s C. 0.0021 m/s D. 0.021 m/s

A. 0.0017 m/s

It is the sum of the organic and total ammoniacal nitrogen. A. Total nitrogen B. Nitrate-nitrogen C. Total Kjeldahl nitrogen D. Ammonium nitrogen

C. Total Kjeldahl nitrogen

In computing for the size of anaerobic lagoons, the sludge volume must be determined. The sludge accumulation ratio for swine production is about: A. 0.0295 B. 0.0485 C. 0.0667 D. 0.0729

B. 0.0485

The size of the settling basin with settling velocity of 0.075m/s and the flow rate of wastewater to be treated is 2.56 m3/s. 100% of the particles will be removed. A. 35 m2 B. 32 m C. 27m2 D. 25m2

A. 35 m2

Which of the following best describes a common maintenance practice for ensuring optimal generator operation? A. Increasing the load on the generator to its maximum capacity regularly B. Keeping the generator in a humid environment to prevent overheating C. Conduct regular load bank testing to prevent carbon buildup D. Running the generator only during power outages to conserve fuel

C. Conduct regular load bank testing to prevent carbon buildup

Which of the following scenarios is a GFCI outlet designed to protect against? A. Short circuits within appliances B. Power surges caused by lightning C. Overloading a circuit with too many devices D. Accidental electrical paths through water or a person

D. Accidental electrical paths through water or a person

According to Kirchhoff’s current law (KCL), what is the relationship between the currents entering and leaving a junction in an electrical circuit? A. The currents are inversely proportional B. The currents are subtractive C. The currents are additive D. The currents are equal

D. The currents are equal

What is the purpose of a capacitor in an AC circuit? A. To store electrical energy B. To convert AC to DC C. To limit the current flow D. To provide resistance

A. To store electrical energy

. If you increase the number of loops in a coil of wire while keeping the area constant, what effect will this have on the induced voltage when the magnetic flux changes? A. Have no effect on the induced voltage B. Decrease the induced voltage C. Increase the induced voltage D. Create a reverse voltage

C. Increase the induced voltage

When a ground fault is detected by a GFCI outlet, what action does it take? A. It increases the power supply to the circuit B. It immediately shuts off the electricity to prevent shocks C. It resets the breaker in the main electrical panel D. It sends a warning signal to a central monitoring system

B. It immediately shuts off the electricity to prevent shocks

Which features are necessary to protect the electrical system of damp agricultural buildings from moisture damage? A. Skylights and ventilation fans for increased air circulation B. Decorative wall panels to enhance the building’s appearance C. Insulated roofing materials to regulate temperature and prevent condensation D. Switches and outlets with shutoff doors for moisture protection

D. Switches and outlets with shutoff doors for moisture protection

. In a parallel circuit with three different resistors (R1, R2, and R3), if R1 = 4 ohms, R2 = 6 ohms, and R3 = 8 ohms, and the total resistance is 2.4 ohms, what is the value of the equivalent resistance of the parallel combination? A. 1.33 ohms B. 3.33 ohms C. 2.4 ohms D. 0.8 ohms

A. 1.33 ohms

The voltage across a 10-ohm resistor is 20 volts. What is the power dissipated by the resistor? A. 200 W C. 400 W B. 2 W D. 4 W

D. 4 W

In an AmkC circuit, what is the phase difference between the voltage across a pure inductor and the current flowing through it? A. 0° B. 45° C. 90° D. 180°

C. 90°

According to PAES 403, for 10,000 layers, the total space requirement for cage type housing shall be at least: A. 0.5 m2 . 5 m2 C. 50 m2 D. 500 m2

D. 500 m2

According to PAES 402, for 10,000 birds, the total space requirement shall be at least: A. 0.125 ha B. 1.250 ha C. 12.5 ha D. 125 m2

A. 0.125 ha

. According to PAES 401, ceiling height for a swine housing shall be at least: A. 1.6 m B. 1.8 m C. 2.4 m D. 4.2 m

. 2.4 m

Determine the mean expected time of planting if the optimistic, most likely, and pessimistic times are 3, 4, and 8 days, respectively. A. 5.5 B. 4.5 C. 6 D. 5

B. 4.5

0. Determine the mean expected time of land preparation if the optimistic, most likely, and pessimistic times are 5, 7, and 12 days, respectively. A. 7.5 B. 6.5 C. 7 D. 6

A. 7.5

Farm to market roads (FMR) are access roads that connect major road arteries to the agricultural production areas where farm produce are being mobilized and transported to the market by the farmers and fishermen. Which of the following is not FMR design criteria: A. FMR shall conform to the land use plan of the area B. FMR shall link or be located in the key production areas of valuable crops C. FMR shall be of service to the LGU, particularly connecting existing roadway system D. FMR shall provide space for the safety and comfortable movement so vehicles

C. FMR shall be of service to the LGU, particularly connecting existing roadway system

What is the building height limit for agricultural structures? A. 1.5 m C. 1.5 ft B. 15 m D. 15 ft

B. 15 m

Most agricultural structures are under this Group of occupancy. A. Group J C. Group G B. Group H D. Group I

A. Group J

hese types of construction belong to the highly fire restrictive zone. A. Type I and II C. Type III and IV B. Type II and III D. Type IV and V

D. Type IV and V

Determine the classification of a square column with effective unbraced length of 10-ft and 12-in depth. A. Short C. Medium B. Intermediate D. Long

A. Short

. Wind loads on the MWFRS may be determined for low rise buildings using this procedure: A. Directional B. Wind tunnel C. Envelope D. Strength desig

C. Envelope

According to the NSCP (2015), greenhouse roof bars, purlins and rafters shall be designed to carry this concentrated load, in addition to the uniform live load. A. 0.45 N B. 450 N C. 45 N

B. 450 N

A mono pitch shed with 15 m long (purlin) and 6 m long (rafter) is to be roofed using corrugated GI sheet. Use 0.3 m end lapping distance and 2 ½ corrugation (side lapping) Determine the most economical number of GI sheets per row A. 20 B. 24 C. 22 D. 25

C. 22 D. 25

What are the lengths of CGI sheets to be used? A. 8 ft and 12 ft .B. 9 ft and 12 ft C. 10 ft and 12 ft D. 11 ft and 12 ft

B. 9 ft and 12 ft

. Find the perimeter of the wall in the figure below A. 65 ft B. 70 ft C. 213 ft D. 230 ft .

C. 213 ft

. Refferring to the figure shown below Find the perimeter of the fence if the gate is 5 m in width. A. 251.62 m C. 250.62 m B. 261.62 m D. 260.62 m

D. 260.62 m

Find the number of CHB 4 needed to complete the 1.6-m fence. A. 5213 C. 5123 B. 5212 D. 5122

A. 5213

What is the recommended proportion of concrete for underwater retaining walls? A. Class AAA C. Class A B. Class AA D. Class B

B. Class AA

Find the quantity of Cement (C), Sand (S) and Gravel (G) needed for a slab that is 30 ft long, 30 ft wide and 0.5 ft thick. Use Class A mixture and Fuller’s method. A. 112 bags, 5.5 m3, 11 m3 B. 100 bags, 5 m3, 10 m3 C. 101 bags, 6 m3, 12 m3 D. 102 bags, 6.5 m3, 13 m

C. 101 bags, 6 m3, 12 m3

The 3.5 m long cantilever beam shown carries a concentrated load of 200 kN (P) at mid-length. The beam has a modulus of elasticity of 200 GPa, and moment of inertia of 60.8 x 106 mm4. How much is the deflection (mm) at mid-length? A. 1.84 B. 29.4 C. 23.5 D. 14.7

B. 29.4

96. What force (kN) should be applied at the free end to prevent deflection? A. 7.8 C. 62.5 B. 41.7 D. 100.0

C. 62.5

To limit the deflection at mid-length to 9.5 mm, how much force (kN) should be applied at the free end? A. 54.1 C. 129.3 B. 76.8 D. 64.7

A. 54.1

A simply supported steel beam spans 9 m. It carries a uniformly distributed load of 10 kN/m including beam weight. Other beam properties are: 98. What is the maximum flexural stress (MPa) in the beam? A. 107 C. 142 B. 54 D. 71

A. 107

To prevent excessive deflection, the beam is propped at midspan using a pipe column. Find the resulting axial stress (MPa) in the column with outside diameter of 200 mm, 10 mm thick, 4 m height and Modulus of elasticity of 200 GPa. A. 4.7 B. 9.4 C. 18.8 D. 2.8

B. 9.4

. How much is the maximum bending stress (MPa) in the propped beam? A. 26.7 C. 15.0 B. 17.8 D. 35.6

A. 26.7

WEEK 2 PART 3 Flashcards

(100 cards)