Periodical Examination
Grading Period: 1st Quarter
Subject and Year Level: Aquaculture - Grade 11
Directions:
Read and understand each question carefully. Write the letter of the correct answer
on a separate sheet of paper.
1. What term is referred to as any hand-held device or implement used to carry out a
particular aquaculture function?
A. Appliance
B. Equipment
C. Gadget
D. Tool
2. Manual construction of dike is usually done by piling soil blocks. What tool is used
to cut soil blocks?
A. Crowbar
B. Digging blade
C. Shovel
D. Spade
3. Fish farms require some essential tools, materials and equipment. The following are
used for its varied purposes, EXCEPT;
A. for harvesting the crop
B. for maintenance and repairs
C. for protecting predators and pests
D. for monitoring, and maintaining water quality
4. Suppose you want to measure the salt concentration of water in your fish farm,
what is the most appropriate tool will you use?
A. Barometer
B. DO meter
C. pH meter
D. Refractometer
5. Why is it necessary to maintain tools and equipment?
A. To extend the life of each tool
B. To increase risk of injury to the operator
C. To increase cost of maintenance down the road
D. To ensure that it works impotently to get the job done longer
6. Which do you think is the best way to maintain farm/aquaculture tools and
equipment?
A. Store tools where you think is convenient for you.
B. Refrain from sharpening tools with blades before and after use.
C. Make sure that metal parts are as sharp and effective as they can possibly be.
D. Let wooden handles be frail before replacing them with new one to avoid extra
cost.
7. Which pond preparation activity is the traditional way of destroying unwanted
organisms in pond bottom?
A.
B.
C.
D.
Pond Drying
Lime application
Pond Harrowing
Fertilizer application
8. How many days is recommended so that the soil in the pond bottom hardens and
cracks?
A. 7 days
B. 10 days
C. 15 days
D. 21 days
9. Which of the following areas is pond drying applicable?
A. In areas where draining of water is impossible
B. In areas where the bottoms will completely dry
C. In areas where rain is prevalent the whole year
D. In ponds where the water table near the surface or seepage enters from adjacent
ponds, puddles and wet areas remain.
10.
There are several factors that affect the time of drying up the pond. Which of
these affects
A. type of soil
B. weather condition
C. shape and contour of pond bottom
D. presence of leakages and seepages
11.
The aim of pond drying is to create an optimum soil environment for the next
crop. The following are the reasons why pond drying is undertaken, EXCEPT;
A. To allow benthic algal mats to propagate
B. To allow the oxidation of organic material
C. For removal or reduction of a high organic load
D. For the oxidization of inorganic compounds such as hydrogen sulfide and
ammonia
12.
There are ponds that are impossible to dry and inadequately dried ponds may
lead to disease outbreak. What alternative do you think is most helpful for ponds
that hard to fully drain?
A. Apply lime to help remove the unwanted substances in ponds
B. Dig down the undesirable organisms and manually pick them up
C. Spread fertilizer all over the area for nutrients to outgrow the existence of
unwanted species
D. Spray an large amount of insecticides and pesticides to totally eliminate
unwanted organisms
13.
What aquaculture operation is done by stirring or cultivating the soil with a
shovel or rake for small ponds and by using rotavator for large pond?
A. Tilling of top dikes
B. Leveling of pond surface
C. Fixing seepages and leakages
D. Cultivation of the pond bottom
14.
What is the main purpose of ploughing the pond bottom?
A. To expose the entire pond bottom to sunlight to be thoroughly dried and compact
B. To expose black soil underneath to sunlight and atmospheric oxygen
C. To promote growth of natural food
D. To condition the soil pH
15.
Ploughing the pond bottom may lead to turbid water conditions during the
culture period. Which pond preparation activity do you think will best minimize, if
not totally prevent this?
A. Compact the pond bottom using logs
B. Compact the pond bottom with heavy rollers
C. Level the surface bottom using rake after the pond has been cultivated and
dried
D. Stamp the cultivated soil with bare foot after the pond has been cultivated
and dried
16.
How deep is the that part of the soil should be exposed during pond
harrowing?
A. 5-10 cm
B. 5-10 in
C. 5-10 g
D. 5-10 kg
17.
Which of the following is the purpose of harrowing?
A. It allows gases to escape at the atmosphere
B. It allows organic matter to decompose in the soil
C. It enhances the growth of natural foods
D. It prevents predatros and competitors to enter the pond
18.
In some studies, harrowing was found to have no significant effects on pond
soil nutrient levels or fish growth and production. However, it is known that it has
another benefit such as eliminating harmful substances locked in the soil. You are
now preparing for another production cycle and is hesitant to undergo pond
harrowing. Which action do you think would be the best option and why?
A. Simply plough the soil instead because ploughing itself help eliminate these
noxious gases
B. Just leave the pond unharrowed because noxious gases are already
eliminated during pond drying
C. Just leave the pond unharrowed since fertilizing would suffice the need of the
pond in the nutrients needed to grow natural food
D. Harrow the pond knowing that it will help harmful gases and substances to
escape in the atmosphere which when left unattended could harm the fish
19.
What aquaculture operation is considered as a remedial procedure needed to
allow normal response of fish stock to fertilization and other management
procedures?
A. Cleaning
B. Fertilizing
C. Liming
D. Weeding
20.
Which among the different types of lime is referred simply as limestone or
lime?
A. Agricultural lime
B. Dolomitic lime
C. Slake Lime
D. Unslake lime
21.
A.
B.
C.
D.
22.
A.
B.
C.
D.
Which of the following is an indication of an acidic pond?
if a pond is newly excavated
if the pond responds to fertilization
if the pond shows no indication of decaying “bakawan” roots
if the pond bottom turns bluish when exposed to sunlight for more than
three days
Which of the following is a good effect of liming?
Eliminates waste products and obnoxious gases.
Hasten the chemical decomposition of organic matters
Stimulate microbial activity that will result to faster nutrient release
Allow oxidization of inorganic compounds such as hydrogen sulfide and
ammonia
23.
Suppose you have a 0.8-hectare pond has a pH of 4.6. For sandy loam
bottom, the rate of application is 4, 475 kg/ha of lime labeled with 92% neutralizing
value and 90% efficiency rate. How much lime should you applied?
A. 1, 333.90 kg
B. 3, 705.30 kg
C. 4, 323.67 kg
D. 4, 631.63 kg
24.
A.
B.
C.
D.
Which conditions of ponds do you think needs or requires liming?
When the water pH is between 7-9
When pond has undergone 2 or 3 production cycle
When a pond is heavily stained with humic substances
When after subsequent fertilization, there is overgrowth of natural food
25.
What aquaculture operation is defined as any human actions, either lethal or
non-lethal, intended to prevent predatory animals from posing threats to stocked
fish in any aquaculture facility?
A. Disease prevention
B. Pest management
C. Predator control
D. Disease control
26.
Burrowing fish such as mudfish or dalag or eels still prevail despite draining
the water during pond preparation. Which traditional aquaculture practice will
eradicate these predators?
A. Poisoning the pond
B. Broadcasting of lime
C. Application of fertilizer
D. Crack-drying the pond
27.
Why is it important to crack-dry the pond bottom during pond preparation?
A. To increase or decrease the and to buffer against daily pH fluctuations
B. To promote the development of planktonic algae which provide food for many
fish
C. To help kill potentially harmful organisms in the soil and speed up the
breakdown of excessive organic matter.
D. To help pond water clear of suspended particles which can help pond
productivity by increasing the light available to plants.
28.
How will do predators and competitors gain access to aquaculture farms?
A. Through waters supplies and seed bought into the pond
B. Through human and animals that enter into the pond vicinity
C. Through the type of soil that are naturally existing in the area
D. Through using different types of pest and predator control in each pond
preparation cycle.
29.
A farmer has an irregularly shaped pond estimated to have 200 cubic meter
(cu m). Since the pond cannot be drained completely, he opted to poison the pond
with Derris roots. If the recommended amount is 0.25 kg per 100 cu m, how many
kilograms of roots is needed?
A. 0.25 kg
B. 0.50 kg
C. 0.75 kg
D. 1.0 kg
30.
What would be the result if a fishpond operator does not undergo proper
elimination of predators and nuisance weeds prior to stocking?
A. infertility of the pond soil due to increased soil acidity
B. meager harvest and possible loss to fish farmer
C. lesser growth of natural foods for the fish
D. higher yield of stock during harvest
31.
The use of commercial insecticides and poison can effectively eliminate
predators. However, the use of known pesticides has been questioned because of its
residual or cumulative effect in the pond, to the stock itself and to its primary
consumers. Which practice would you opt to instead?
A. Apply quicklime as liming is known as the simplest fish toxins
B. Collect these predators manually or mechanically to avoid further effort and cost
C. Use alternative pesticides which act subsequently as fertilizers such tobacco
dust and teaseed
D. Continue applying Endrin, Dieldrin, aldrin or toxafane as these are effective to
eliminate all kinds of predators and competitors
32.
Newly hatched fish do not necessarily need feeding and fry mostly rely on
natural foods available in the pond. What substances will you apply to increase the
production of natural food organisms?
A. Fertilizer
B. Humus
C. Lime
D. Pesticide
33.
When is the best time to fertilize pond?
A. Fertilizer application is best applied any time the operator feels so
B. During the production cycle, at short intervals of one to two weeks
C. As soon as the pond is drained of water and at least ten to 15 days before
stocking with fish.
D. Application of inorganic fertilizers during the production cycle should be based
on observations of both soil pH and predator’s behavior.
34.
Organic and inorganic fertilizers both contain mineral nutrients needed in the
production of natural food. Which is an advantage of an organic fertilizer?
A. It is cheap and available locally
B. It is more easily stored and distributed
C. It is bulky and needed in larger amount
D. It is readily available and has lighter weight
35.
If phosphorous is the limiting primary nutrient most often missing in natural
water supplies for growth of planktonic algae, which of the following inorganic
fertilizer will you use?
A. Potassium fertilizers as ponds are usually built in swampy areas or on peaty
soil
B. Nitrogen fertilizers as they are useful in areas where agriculture is less
developed
C. Ammonium compounds and urea since they are known to be acid forming
fertilizers
D. Phosphate fertilizers as they are known as the most effective inorganic
fertilizer in ponds
36.
Which aquaculture material refer to natural or synthetic substances that are
used in ponds to increase the production of the natural food organisms to be eaten
by the fish?
A. Fertilizer
B. Lime
C. Pesticide
D. Teaseed
37.
Which of the following is an example of an organic fertilizer?
A. Compost
B. Potash
C. Superphosphate
D. Urea
38.
What is the importance of growing natural food such as lumut, plankton and
lablab in the pond?
A. Fish feed on natural at early fry
B. Fish prefer natural food compared to artificial food
C. Artificial feeds have lesser nutrient content than the natural foods
D. Natural food serves as the main feed in the whole aquaculture process
39.
You want to apply organic fertilizer in your 3-hectare pond to grow natural
food for fish. If the required application rate of fertilizer is 2.5 ton of chicken dung
per hectare, how many tons of chicken dung will you need?
A. 5.5 kg
B. 5.5 tons
C. 7.5 kg
D. 7.5 tons
40.
One effective way of making the best use of fertilizer in growing natural food
is to establish and maintain a good plankton bloom at minimum cost. Which of the
following points will you consider?
A. Ensure that pond water and bottom soil should be neutral and alkaline
B. The bottom mud must be thick and should be made of coarse detritus and
cellulose
C. Increase the competition of for nutrients and sunlight by allowing growth of
floating and submerged vegetation
D. Increase the water exchange rate as much as possible to drain away water rich
in nutrients and plankton
41.
What aquaculture device/facility is aimed at supplying a pond with proper
concentration of dissolved oxygen?
A.
B.
C.
D.
Aerators
Filtrators
Sublimators
Tiller
A.
B.
C.
D.
Which type of aerator is commonly used in large ponds?
Diffusers
Bubblers
Paddle wheel
Vertical pump
42.
43.
A.
B.
C.
D.
The following are the aims of aerating the water, EXCEPTTo facilitate a faster gas exchange
To condition and balance water pH
To create a large water-air surface in relation to water volume
To have a quick achievement of equilibrium between the gases in the water and
in air
44.
When looking at the size of pond aerators, it’s important to consider the total
size of your pond.Which do you think is the type of aerator that is suited for ponds
with depth of more than ten feet or a large surface area?
A. Pond fountain
B. Paddle wheel
C. Rotavator type
D. A combination of pond aeration system
45.
What term is used as a measure of the suitability of water for aquaculture
operations based on its physical, chemical and biological characteristics?
A. Water quality
B. Water control
C. Water reservoir
D. Water parameters
46.
Water temperature is one of the water quality parameters that should be
monitored regularly to ensure good quality of stock. What device is used to measure
water temperature?
A. Current meter
B. Hydrometer
C. DO meter
D. Thermometer
47.
All fish regardless of species and culture conditions need oxygen for growth
and survival. What is effect lack of oxygen to fish?
A. It results in poor growth and outbreak of diseases
B. It results to resistance to disease and overgrowth
C. It results to algal bloom and food poisoning to its primary consumers
D. It results to overcrowding and overgrowth of unwanted water weeds
48.
Salinity can drop easily in most fresh water during rainy days. What will you
do to minimize dilution or abrupt lowering of salinity?
A. totally drain the pond and replace with tide water
B. partially drain the water by allowing the topmost water to go out
C. allow as much tidal water to the pond as possible when rain is expected
D. let the rainwater fill the pond since rainwater is acidic and will result to pH
balance
49.
DO
meter
:
to
measure
dissolved
____________________________
A. to measure water current
B. to measure water turbidity
C. to measure water and soil pH
D. to measure the amount of salt in water
oxygen;
Refractometer
:
50.
Water pH can be measured with the use of litmus paper, pH comparator,
portable pH meters, or the Hack kit. In the absence of any of this equipment, which
do you think is the most practical way to determine the pH?
A. By tasting the water
B. By looking at the water color
C. By observing the water current
D. By spreading lime and observing the water reaction