The botanical name of the tea plant is Camellia sinensis.
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2Which portion of the tea plant is commonly harvested to produce high-quality tea?
Tea
Easy
A.Two leaves and a bud
B.Mature roots and bark
C.Dry flowers and fruits
D.Old branches and stems
Correct Answer: Two leaves and a bud
Explanation:
Tender shoots consisting of two leaves and a bud are commonly plucked for quality tea production.
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3Which type of soil is generally suitable for tea cultivation?
Tea
Easy
A.Strongly alkaline soil
B.Waterlogged clay soil
C.Highly saline sandy soil
D.Well-drained acidic soil
Correct Answer: Well-drained acidic soil
Explanation:
Tea grows best in deep, well-drained, acidic soil rich in organic matter.
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4What is the main purpose of pruning tea bushes?
Tea
Easy
A.To promote the production of fruits
B.To maintain a convenient plucking table
C.To increase the size of tea roots
D.To eliminate the need for irrigation
Correct Answer: To maintain a convenient plucking table
Explanation:
Pruning keeps tea bushes at a manageable height and maintains a broad surface for plucking.
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5Which coffee species is widely known for producing mild and aromatic coffee?
Coffee
Easy
A.Coffea robusta
B.Coffea arabica
C.Coffea excelsa
D.Coffea liberica
Correct Answer: Coffea arabica
Explanation:
Coffea arabica is valued for its mild flavor and pleasant aroma.
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6The coffee plant belongs to which botanical family?
Coffee
Easy
A.Anacardiaceae
B.Euphorbiaceae
C.Rubiaceae
D.Malvaceae
Correct Answer: Rubiaceae
Explanation:
Coffee belongs to the family Rubiaceae.
Incorrect! Try again.
7What is the fruit of the coffee plant commonly called?
Coffee
Easy
A.Coffee capsule
B.Coffee cherry
C.Coffee cone
D.Coffee follicle
Correct Answer: Coffee cherry
Explanation:
The fleshy fruit containing coffee seeds is commonly called a coffee cherry or berry.
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8Which field condition is commonly provided for young coffee plants?
Coffee
Easy
A.Heavy salinity
B.Standing water
C.Complete darkness
D.Partial shade
Correct Answer: Partial shade
Explanation:
Young coffee plants are commonly grown under partial shade to protect them from intense sunlight.
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9What is the botanical name of cocoa?
Cocoa
Easy
A.Coffea canephora
B.Anacardium occidentale
C.Theobroma cacao
D.Camellia sinensis
Correct Answer: Theobroma cacao
Explanation:
The botanical name of cocoa is Theobroma cacao.
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10Which commercial product is mainly prepared from cocoa beans?
Cocoa
Easy
A.Black tea
B.Natural rubber
C.Chocolate
D.Roasted cashew
Correct Answer: Chocolate
Explanation:
Cocoa beans are processed to produce cocoa products, especially chocolate.
Incorrect! Try again.
11What does cauliflory in cocoa mean?
Cocoa
Easy
A.Flowers develop below the soil
B.Flowers develop on the trunk
C.Flowers develop inside the fruit
D.Flowers develop only on roots
Correct Answer: Flowers develop on the trunk
Explanation:
Cocoa exhibits cauliflory, in which flowers and fruits develop directly on the trunk and older branches.
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12Which climate is most suitable for cocoa cultivation?
Cocoa
Easy
A.Cold and dry climate
B.Cool and arid climate
C.Hot and humid climate
D.Frosty and windy climate
Correct Answer: Hot and humid climate
Explanation:
Cocoa is a tropical crop that grows well under warm, humid conditions with adequate rainfall.
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13What is the botanical name of cashewnut?
Cashewnut
Easy
A.Camellia sinensis
B.Hevea brasiliensis
C.Theobroma cacao
D.Anacardium occidentale
Correct Answer: Anacardium occidentale
Explanation:
The botanical name of cashewnut is Anacardium occidentale.
Incorrect! Try again.
14The cashew plant belongs to which botanical family?
Cashewnut
Easy
A.Anacardiaceae
B.Euphorbiaceae
C.Rubiaceae
D.Musaceae
Correct Answer: Anacardiaceae
Explanation:
Cashew belongs to the family Anacardiaceae.
Incorrect! Try again.
15Where is the cashew nut located in relation to the cashew apple?
Cashewnut
Easy
A.Beside the flower stalk
B.Inside the cashew apple
C.Above the cashew apple
D.Below the cashew apple
Correct Answer: Below the cashew apple
Explanation:
The true cashew fruit, commonly called the nut, develops externally at the lower end of the cashew apple.
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16Which propagation method is commonly used to multiply elite cashew plants?
Cashewnut
Easy
A.Softwood grafting
B.Tuber cutting
C.Rhizome division
D.Leaf separation
Correct Answer: Softwood grafting
Explanation:
Softwood grafting is commonly used to produce uniform cashew plants with desirable traits.
Incorrect! Try again.
17What is the botanical name of the commercial rubber tree?
Rubber
Easy
A.Theobroma cacao
B.Coffea arabica
C.Anacardium occidentale
D.Hevea brasiliensis
Correct Answer: Hevea brasiliensis
Explanation:
The main commercial source of natural rubber is Hevea brasiliensis.
Incorrect! Try again.
18What is the milky liquid obtained from a rubber tree called?
Rubber
Easy
A.Resin
B.Sapwood
C.Latex
D.Nectar
Correct Answer: Latex
Explanation:
Latex is the milky fluid collected from rubber trees and processed into natural rubber.
Incorrect! Try again.
19What is the process of collecting latex from a rubber tree called?
Rubber
Easy
A.Pruning
B.Budding
C.Layering
D.Tapping
Correct Answer: Tapping
Explanation:
Tapping involves making controlled cuts in the bark so that latex flows into a collection cup.
Incorrect! Try again.
20Which propagation method is commonly used for commercial rubber planting material?
Rubber
Easy
A.Leaf cutting
B.Air layering
C.Bud grafting
D.Crown division
Correct Answer: Bud grafting
Explanation:
Bud grafting is widely used to multiply selected high-yielding rubber clones.
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21A tea estate receives frequent rainfall, but plants in a low-lying block show yellowing and root decline. Which corrective measure is most appropriate?
Tea
Medium
A.Reduce the height of shade trees
B.Apply additional nitrogen fertilizer
C.Increase the frequency of plucking
D.Improve surface and subsurface drainage
Correct Answer: Improve surface and subsurface drainage
Explanation:
Tea requires abundant moisture but is highly sensitive to waterlogging. Effective drainage improves root aeration and prevents root decline.
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22A manager wants to produce high-quality made tea while maintaining sufficient foliage for continued shoot growth. Which plucking standard should generally be followed?
Tea
Medium
A.A bud with four mature leaves
B.Only fully expanded maintenance leaves
C.A bud with two tender leaves
D.Three leaves without the bud
Correct Answer: A bud with two tender leaves
Explanation:
The standard of two tender leaves and a bud provides good-quality raw material while retaining adequate maintenance foliage on the bush.
Incorrect! Try again.
23During one plucking round, 8,000 marketable tea shoots are harvested, with an average shoot weight of . What is the approximate green-leaf yield?
Tea
Medium
A.
B.
C.
D.
Correct Answer:
Explanation:
Yield is , which equals .
Incorrect! Try again.
24An old tea block has developed tall, irregular bushes with a declining plucking surface. Which field operation would most directly restore a manageable productive frame?
Tea
Medium
A.Continuous removal of shade trees
B.Deep pruning at the recommended cycle
C.Repeated application of foliar nutrients
D.Delayed harvesting of mature shoots
Correct Answer: Deep pruning at the recommended cycle
Explanation:
Periodic pruning removes unproductive wood and renews the bush frame, producing a uniform and accessible plucking surface.
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25After a prolonged dry period, a coffee plantation needs uniform flowering before the normal rains begin. Which irrigation practice is most suitable?
Coffee
Medium
A.Irrigate only after harvesting
B.Apply a blossom shower
C.Maintain continuous flooding
D.Withhold water until fruit set
Correct Answer: Apply a blossom shower
Explanation:
A blossom shower after a dry spell stimulates synchronized flowering. A later backing shower may support fruit set when rainfall is inadequate.
Incorrect! Try again.
26A grower plans to establish coffee in a warmer, lower-elevation site where coffee leaf rust is common. Which species is generally the more suitable choice?
Coffee
Medium
A.Arabica coffee
B.Excelsa coffee
C.Liberica coffee
D.Robusta coffee
Correct Answer: Robusta coffee
Explanation:
Robusta is better adapted to warmer, lower elevations and generally has greater tolerance to coffee leaf rust than Arabica.
Incorrect! Try again.
27A producer wants to prepare washed coffee with a clean cup profile. What should be done soon after harvesting ripe berries?
Coffee
Medium
A.Roast the berries before removing pulp
B.Store the berries in sealed dry bags
C.Dry the whole berries without pulping
D.Pulp the berries and ferment the mucilage
Correct Answer: Pulp the berries and ferment the mucilage
Explanation:
In wet processing, ripe berries are pulped, fermented to remove mucilage, washed, and then dried to produce parchment coffee.
Incorrect! Try again.
28Coffee plants in an exposed block show leaf scorching and excessive soil-moisture loss during hot months. Which management change is most appropriate?
Regulated shade moderates temperature, reduces moisture loss, and protects coffee leaves. Excessive shade should still be avoided because it can suppress flowering.
Incorrect! Try again.
29A farmer wishes to introduce cocoa beneath an established coconut garden. Which condition most strongly supports the suitability of this system?
Cocoa
Medium
A.Full sunlight with frequent dry winds
B.Complete removal of the coconut canopy
C.Deep flooding during the rainy season
D.Filtered shade with adequate soil moisture
Correct Answer: Filtered shade with adequate soil moisture
Explanation:
Cocoa is shade-loving and performs well as an intercrop under coconut when filtered light, moisture, drainage, and nutrient supply are adequate.
Incorrect! Try again.
30A cocoa grower dries freshly extracted beans immediately and obtains chocolate with weak aroma and excessive bitterness. Which omitted operation most likely caused the problem?
Cocoa
Medium
A.Polishing of the dry beans
B.Grinding of the fresh beans
C.Fermentation of the wet beans
D.Scarification of the seed coat
Correct Answer: Fermentation of the wet beans
Explanation:
Fermentation removes mucilage, reduces bitterness and astringency, and initiates the biochemical changes needed for chocolate flavor development.
Incorrect! Try again.
31Vigorous upright shoots arise below the jorquette of a bearing cocoa tree and begin competing with the main canopy. How should these shoots be managed?
Cocoa
Medium
A.Graft them onto existing fan branches
B.Retain them as permanent fan branches
C.Bend them toward the main stem
D.Remove them as unwanted chupons
Correct Answer: Remove them as unwanted chupons
Explanation:
Chupons are vigorous vertical shoots that compete with the established framework. Unwanted chupons are removed to maintain canopy structure and productivity.
Incorrect! Try again.
32A worker searches only among the outer branches for harvestable cocoa pods and misses a large proportion of the crop. Which growth characteristic explains the error?
Cocoa
Medium
A.Pods remain hidden beneath the soil surface
B.Pods develop only on new terminal shoots
C.Pods are borne on the trunk and old branches
D.Pods form mainly on detached flower stalks
Correct Answer: Pods are borne on the trunk and old branches
Explanation:
Cocoa is cauliflorous, meaning flowers and pods are produced directly on the trunk and older woody branches.
Incorrect! Try again.
33A grower wants a new cashew orchard with uniform tree type and early bearing. Which planting material is most appropriate?
Cashewnut
Medium
A.Softwood-grafted plants from elite trees
B.Fresh seedlings from unknown local trees
C.Open-pollinated seedlings from mixed nuts
D.Root cuttings collected from old trees
Correct Answer: Softwood-grafted plants from elite trees
Explanation:
Softwood grafting preserves desirable characters of elite mother trees and produces more uniform, earlier-bearing orchards than seed propagation.
Incorrect! Try again.
34A cashew farmer carries out severe pruning of healthy terminal shoots immediately before flowering. What is the most likely effect on the next crop?
Cashewnut
Medium
A.Nut size increases because flowers become bisexual
B.Yield decreases because bearing terminals are removed
C.Yield increases because more roots are produced
D.Harvest advances because apples mature underground
Correct Answer: Yield decreases because bearing terminals are removed
Explanation:
Cashew bears flowers in terminal panicles. Severe removal of healthy shoot terminals before flowering reduces the number of potential bearing sites.
Incorrect! Try again.
35An old cashew orchard contains healthy trees of poor genetic quality and gives consistently low yields. Which method can replace their canopies without replanting the entire orchard?
Cashewnut
Medium
A.Top-working with superior scions
B.Ring-barking the productive limbs
C.Layering every mature branch
D.Direct seeding beneath each tree
Correct Answer: Top-working with superior scions
Explanation:
Top-working replaces the canopy of an established inferior tree with scions from a superior genotype while retaining the existing root system.
Incorrect! Try again.
36A farmer collects cashew nuts by shaking trees while many apples are still green. Which practice would better improve nut maturity and kernel quality?
Mature cashew apples and nuts usually fall naturally. Frequent collection from the ground helps obtain fully developed nuts and reduces deterioration.
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37A budded rubber tree has not yet reached the recommended trunk girth for opening. Why should tapping be postponed?
Rubber
Medium
A.Tapping before flowering causes seedlessness
B.Early tapping can impair growth and future yield
C.Young bark contains no functional latex vessels
D.Late tapping permanently prevents latex flow
Correct Answer: Early tapping can impair growth and future yield
Explanation:
Opening undersized trees removes latex and bark before adequate trunk development, which can weaken trees and reduce long-term productivity.
Incorrect! Try again.
38A tapping schedule is written as . How should it be interpreted?
Rubber
Medium
A.Half-spiral cut tapped twice each month
B.Quarter-spiral cut tapped on alternate weeks
C.Full-spiral cut tapped twice each day
D.Half-spiral cut tapped on alternate days
Correct Answer: Half-spiral cut tapped on alternate days
Explanation:
indicates a half-spiral tapping cut, while indicates tapping once every two days.
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39Latex collection drops sharply during a rainy period because water repeatedly wets the tapping panel and collection cup. Which intervention is most appropriate?
Rubber
Medium
A.Increase tapping depth into the wood
B.Coagulate latex directly on the bark
C.Remove the protective canopy completely
D.Install rain guards above the tapping panel
Correct Answer: Install rain guards above the tapping panel
Explanation:
Rain guards keep the tapping cut and cup dry, allowing more regular tapping and reducing dilution or loss of latex during wet weather.
Incorrect! Try again.
40A rubber tapper repeatedly cuts too deeply and injures the cambium. What is the most likely long-term consequence?
Rubber
Medium
A.Earlier flowering and greater seed production
B.Permanent improvement in latex vessel formation
C.Faster bark renewal and increased trunk girth
D.Irregular bark renewal and reduced tapping life
Correct Answer: Irregular bark renewal and reduced tapping life
Explanation:
Cambial injury causes wounds and uneven bark regeneration, making future tapping difficult and shortening the productive life of the tapping panel.
Incorrect! Try again.
41A new tea field is to be established on a 35% slope in a region receiving intense monsoon rainfall. Which layout best limits soil erosion while maintaining root-zone aeration?
Tea
Hard
A.Plant directly down the slope with deep basins around individual bushes
B.Remove all ground vegetation, construct vertical channels, and orient every access path downslope
C.Plant in square blocks and retain standing water between adjacent rows
D.Plant along contours with staggered rows, vegetative barriers, and graded drains
Correct Answer: Plant along contours with staggered rows, vegetative barriers, and graded drains
Explanation:
Contour alignment and vegetative barriers slow runoff, while graded drains safely remove excess water. Tea requires moist but well-aerated soil and is sensitive to waterlogging.
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42During clonal propagation of tea, a worker removes the leaf from every single-node cutting but retains the axillary bud. What is the most likely consequence?
Tea
Hard
A.Rooting declines because the cutting loses a major photosynthetic and hormonal source
B.Rooting remains unchanged because the dormant bud supplies all required carbohydrates
C.Rooting improves because transpiration is completely eliminated
D.Rooting improves only because leaf removal converts the axillary bud into a root initial
Correct Answer: Rooting declines because the cutting loses a major photosynthetic and hormonal source
Explanation:
A standard tea cutting retains one leaf and its axillary bud. The leaf supports photosynthesis and rooting signals, although its area may be managed to limit water loss.
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43A tea estate receives a premium for liquor quality, but recent harvests contain many coarse shoots. Which plucking adjustment is most appropriate?
Tea
Hard
A.Remove maintenance foliage below the plucking table during every round
B.Adopt shorter rounds and harvest predominantly two leaves and a bud
C.Adopt longer rounds and harvest four leaves with each terminal bud
D.Delay harvesting until the terminal bud becomes dormant and all leaves harden
Correct Answer: Adopt shorter rounds and harvest predominantly two leaves and a bud
Explanation:
Fine plucking at shorter intervals limits coarse leaf inclusion. The standard quality shoot is generally two tender leaves and a bud.
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44A mature tea field has a healthy frame, but its plucking surface has become slightly elevated and uneven. The manager wants minimal crop interruption and no removal of major branches. Which operation is most suitable?
Tea
Hard
A.Light skiffing
B.Collar pruning
C.Rejuvenation pruning
D.Deep formative pruning
Correct Answer: Light skiffing
Explanation:
Light skiffing removes only the thin upper layer of shoots, restoring a manageable plucking surface without cutting into the main frame.
Incorrect! Try again.
45After a prolonged dry period, coffee bushes receive blossom irrigation and flower uniformly. No rain follows flowering. Which subsequent practice most directly reduces flower and young-fruit loss?
Coffee
Hard
A.Remove all primary branches bearing flowers
B.Flood the field continuously from flowering until harvest to prevent any temporary soil-water deficit
C.Apply backing irrigation after fruit set begins
D.Impose another extended dry period immediately
Correct Answer: Apply backing irrigation after fruit set begins
Explanation:
Blossom irrigation induces uniform flowering after a dry spell. If rain fails, backing irrigation supports fruit set and early berry development.
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46An exhausted coffee stem must be replaced without changing the root system. Which shoot should be selected to form the new stem?
Coffee
Hard
A.A fruiting twig arising at the tip of a tertiary branch
C.A vigorous orthotropic sucker arising near the stem base
D.A secondary lateral branch carrying old berries
Correct Answer: A vigorous orthotropic sucker arising near the stem base
Explanation:
Orthotropic shoots have upright trunk-forming growth. Plagiotropic branches retain lateral growth and cannot properly replace the main stem.
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47A coffee lot contains selectively harvested ripe cherries intended for a high-quality washed product. Which processing sequence best preserves this objective?
Coffee
Hard
A.Heap the unsorted cherries for several days before pulping so that spontaneous fermentation removes the skin and mucilage together
B.Boiling the cherries, mechanical pulping, washing, and rapid roasting
C.Whole-cherry sun drying, prolonged storage, hulling, and rewetting
D.Prompt pulping, controlled mucilage fermentation, washing, and gradual drying
Washed coffee requires prompt pulping followed by controlled mucilage removal, washing, and careful drying. Delays encourage uncontrolled fermentation and off-flavours.
Incorrect! Try again.
48An estate must allocate two sites: a cool high-elevation site with moderate leaf-rust pressure and a warmer lower-elevation site. Which allocation is agronomically most appropriate?
Coffee
Hard
A.Arabica at the higher site and Robusta at the warmer lower site
B.Robusta at the higher site and Arabica at the warmer lower site
C.Robusta at both sites because Arabica requires continuously flooded soil
D.Arabica at both sites because Robusta cannot tolerate shade
Correct Answer: Arabica at the higher site and Robusta at the warmer lower site
Explanation:
Arabica generally performs best under cooler high-elevation conditions, whereas Robusta is better adapted to warmer, lower elevations and is comparatively more robust.
Incorrect! Try again.
49Cocoa trees under a very dense coconut canopy flower profusely but set few pods. The floor is dry and repeatedly cleared of organic residues. Which integrated change is most likely to improve production?
Cocoa
Hard
A.Remove every shade palm and maintain bare, sun-exposed soil throughout the year
B.Regulate overhead shade and retain moist organic matter that supports pollinating midges
C.Flood the plantation continuously and eliminate all insects with residual insecticide
D.Retain the dense canopy but remove cocoa flowers so that vegetative growth receives all assimilates
Correct Answer: Regulate overhead shade and retain moist organic matter that supports pollinating midges
Explanation:
Excessive shade restricts photosynthesis, while moist decomposing organic matter supports cocoa-pollinating midges. Balanced shade and a favourable pollinator habitat improve pod set.
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50A seedling cocoa block flowers abundantly but repeatedly shows poor pod set because many trees are self-incompatible and genetically related. Which intervention most directly addresses the constraint?
Cocoa
Hard
A.Remove every tree that produces flowers on the trunk
Self-incompatibility is overcome by providing compatible pollen sources. A mixture of known cross-compatible clones improves fertilization and pod set.
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51In formative pruning of cocoa, which decision correctly distinguishes chupons from fan branches?
Cocoa
Hard
A.Remove unwanted upright chupons while retaining well-spaced fan branches at the jorquette
B.Remove the jorquette annually and retain only downward-growing tertiary branches
C.Retain all basal chupons and remove every branch arising at the jorquette
D.Train fan branches vertically as replacement taproots
Correct Answer: Remove unwanted upright chupons while retaining well-spaced fan branches at the jorquette
Explanation:
Chupons are vigorous orthotropic shoots that can overcrowd the canopy. Fan branches are plagiotropic framework branches arising at the jorquette and should be selectively retained.
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52A batch of dried cocoa beans is strongly astringent and shows a high proportion of slaty-purple cotyledons. Which earlier processing failure most plausibly caused this defect?
Cocoa
Hard
A.Excessive polishing after drying
B.Insufficient fermentation before drying
C.Prolonged storage of fully dried beans at a stable moisture content
D.Excessive pod formation before harvest
Correct Answer: Insufficient fermentation before drying
Explanation:
Under-fermentation leaves cotyledons purple or slaty and preserves excessive bitterness and astringency. Adequate fermentation develops flavour precursors and the characteristic brown colour.
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53A breeder has identified an elite cashew tree with high nut weight and shelling percentage. Which method is most appropriate for establishing a genetically uniform commercial orchard from it?
Cashewnut
Hard
A.Raising seedlings from mixed nuts collected across the orchard
B.Planting only large cashew apples because apple size guarantees identical kernel genotype
C.Softwood grafting using scions from the elite tree
D.Direct sowing of open-pollinated nuts from the elite tree
Correct Answer: Softwood grafting using scions from the elite tree
Explanation:
Cashew seedlings are genetically variable because of cross-pollination. Softwood grafting clonally preserves the elite tree's desirable traits.
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54A cashew orchard flowers normally, but fruit set falls sharply after repeated broad-spectrum insecticide sprays during peak bloom. What is the most defensible diagnosis and response?
Cashewnut
Hard
A.Kernel dormancy; irrigate harvested nuts before flowering ends
B.Excessive vegetative propagation; replace grafts with random seedlings
C.Pollinator suppression; avoid disruptive sprays during peak flowering
D.Insufficient shell oil formation; apply insecticide more frequently to every open panicle
Correct Answer: Pollinator suppression; avoid disruptive sprays during peak flowering
Explanation:
Cashew bears male and bisexual flowers and depends substantially on insect-mediated pollination. Broad-spectrum sprays during bloom can reduce pollinator activity and fruit set.
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55Which statement correctly relates the harvested components of cashew to their botanical and commercial roles?
Cashewnut
Hard
A.The apple is the true fruit, while the nut is a swollen floral receptacle
B.The apple and nut are separate true fruits developing from two independently fertilized ovaries
C.The nut is the true fruit, the kernel is its seed, and the apple is an accessory structure
D.The kernel is the pericarp, while the shell is an enlarged cotyledon
Correct Answer: The nut is the true fruit, the kernel is its seed, and the apple is an accessory structure
Explanation:
The cashew nut is the true fruit containing the edible seed or kernel. The cashew apple is a swollen accessory structure derived mainly from the pedicel and receptacular tissues.
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56An adult cashew orchard has dense, interlocking canopies and declining flowering. Because cashew bears mainly on terminal shoots, which canopy-management schedule is most suitable?
Cashewnut
Hard
A.Pollard every tree heavily during full bloom each year
B.Retain all crossing branches and remove only newly formed peripheral shoots
C.Prune crowded branches after harvest to stimulate new bearing terminals
D.Remove all current terminals immediately before panicle emergence
Correct Answer: Prune crowded branches after harvest to stimulate new bearing terminals
Explanation:
Postharvest canopy regulation improves light penetration and encourages new shoots whose terminals can bear the next crop. Pruning at flowering would remove potential bearing sites.
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57In rubber tapping notation, what does the system S/2 d2 6d/7 indicate?
Rubber
Hard
A.A half-spiral cut tapped daily, two weeks out of seven
B.Two half-spiral cuts tapped simultaneously on all seven days of the week
C.A half-spiral cut tapped on alternate days, six days per week
D.A full-spiral cut tapped twice daily, six days per week
Correct Answer: A half-spiral cut tapped on alternate days, six days per week
Explanation:
S/2 denotes a half-spiral cut, d2 denotes alternate-day tapping, and 6d/7 indicates operation on six days in a seven-day week.
Incorrect! Try again.
58Under standard practice for opening a uniform stand of budded rubber, which condition most appropriately indicates tappability?
Rubber
Hard
A.Half the trees attain 40 cm girth at the first branching point
B.The tallest trees begin flowering, irrespective of trunk girth, bark thickness, or the proportion of tappable trees
C.About 70% of trees attain roughly 50 cm girth at 1.25 m above the bud union
D.Every tree attains 30 cm girth measured directly at the bud union
Correct Answer: About 70% of trees attain roughly 50 cm girth at 1.25 m above the bud union
Explanation:
A budded rubber stand is generally opened when about 70% of trees reach approximately 50 cm girth at the prescribed height, with adequate bark thickness.
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59A high-yielding rubber block develops increasing tapping-panel dryness after frequent tapping and repeated stimulant application. Which immediate response is most appropriate?
Rubber
Hard
A.Remove all untapped bark and reopen the same panel below the original cut
B.Double stimulant concentration and shift to twice-daily tapping
C.Suspend or reduce tapping and discontinue stimulation on affected trees
D.Deepen the tapping cut until wood injury restores latex flow
Correct Answer: Suspend or reduce tapping and discontinue stimulation on affected trees
Explanation:
Tapping-panel dryness is aggravated by excessive exploitation and stimulation. Resting affected trees and reducing tapping intensity help prevent further physiological damage.
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60Fresh latex is intended for production of ribbed smoked sheets. Which sequence is technically appropriate?
Rubber
Hard
A.Add concentrated mineral acid, sun-bake the curd, and polish it with shell oil
B.Concentrate latex by boiling, add strong alkali, cast blocks, and freeze-dry
C.Allow uncontrolled field coagulation, mix the coagulum with soil, and press it directly into export-grade sheets
D.Strain latex, coagulate with controlled dilute acid, roll into sheets, and smoke-dry
Correct Answer: Strain latex, coagulate with controlled dilute acid, roll into sheets, and smoke-dry
Explanation:
Ribbed smoked sheets are prepared by cleaning and standardizing latex, controlled coagulation—commonly with dilute formic acid—rolling, and smoke drying.
Incorrect! Try again.
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