Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 1. | Which
greenhouse covering material permits the greatest amount of sunlight to enter? a. | Glass | c. | Clear
fiberglass | b. | Polyethylene | d. | A and C | | | | |
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| 2. | Suppose a
greenhouse covering material has a BTU heat loss value of .56. This is an
? a. | efficient material; low heat loss. | c. | efficient material; high heat loss. | b. | inefficient material;
high heat loss. | d. | inefficient material;
low heat loss. | | | | |
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| 3. | The number
of applications of growth regulator depends on the
? a. | cultivar
vigor. | c. | temperature of the
greenhouse. | b. | size of the container. | d. | all of the above. | | | | |
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| 4. | John needed
to add lime and change the type of fertilizer he used to reduce his soil acidity. He should have
changed his fertilizer to
? a. | ammonium
phosphate | c. | Urea | b. | calcium nitrate | d. | ammonium nitrate | | | | |
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| 5. | A solenoid
valve
? a. | is a good light
source. | b. | is a common source of problems with gasoline flow in small
engines. | c. | is a switch often used for controlling water
flow. | d. | regulates the heating and cooling system in a
greenhouse | | |
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| 6. | Of the
plants listed below all but
are considered herbaceous. a. | camellia | c. | zinnia | b. | chrysanthemum | d. | alyssum | | | | |
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| 7. | The art of
dwarfing plants by growing them in shallow pots is called
? a. | bonsai. | c. | hydroponics | b. | stunt-culture. | d. | harri-kerri | | | | |
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| 8. | Which
plant(s) grow best in an acidic soil (pH 5.0-6.0)? a. | azaleas | c. | camellias | b. | chrysanthems | d. | both a and c | | | | |
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| 9. | Bulbs are
dug and separated
? a. | after the foliage dies
back. | c. | during
dormancy. | b. | in the early winter. | d. | all the above | | | | |
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| 10. | Cindy
discovers that her bedding plant starts, like her, are leggy, pale and weak. This could be due to
? a. | low light in the
greenhouse. | c. | excessive heat in the
greenhouse. | b. | crowding of the plants. | d. | all the above | | | | |
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| 11. | The response
when plants bend in the direction of more intense light is termed
? a. | photoperiodism | c. | photo
response | b. | phototropism | d. | photosynthesis | | | | |
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| 12. | Hail damage
is greatest on
? a. | sinners | c. | fiberglass
greenhouses | b. | glass greenhouses | d. | poly greenhouses | | | | |
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| 13. | How often a
houseplant needs water depends on
? a. | the type of
plant. | c. | how much light the
plant receives. | b. | the type of soil used. | d. | all the above. | | | | |
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| 14. | On which
side of the greenhouse cooling pads will the air be most humid when the pad system is in operation
? a. | outside the
greenhouse | c. | the air is equally
humid on both sides | b. | inside the greenhouse | d. | the answer will vary with the season | | | | |
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| 15. | John is
trying to compete on the local market with flower growers in South America who are selling large
quantities of flowers in his area. With which of the crops below would he be most likely able to
compete with the foreign competition? a. | cut carnations | c. | cut pom pom mums | b. | cut
roses | d. | potted
mums | | | | |
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| 16. | A common
problem with azaleas is
? a. | iron
chlorosis | c. | lace
bugs | b. | all the
above | d. | none of the
above | | | | |
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| 17. | Suzie
examined the soil mix she had just purchased. She recognized one of the three ingredients as pine
bark. Assuming this was a good greenhouse growing mix, what were the other two ingredients likely to
be? a. | perlite and
vermiculite | c. | perlite and
sand | b. | vermiculite and
sand | d. | either B
or | | | | |
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| 18. | Standard
pots are not generally used with pot mums because of the
? a. | height problem with
mums. | b. | high cost of standard pots. | c. | limited water holding
capacity. | d. | problem of disbudding pot mums in
standard pots. | | |
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| 19. | Which
statement is true concerning wire and ribbon sizes? a. | The larger the number
the smaller the wire and narrower the ribbon. | b. | The larger the number
the larger the wire and wider the ribbon. | c. | The larger the number the smaller the wire and wider the
ribbon. | d. | The larger the number the larger the wire and narrower the
ribbon. | | |
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| 20. | Which of the
following is considered in the trade to be a Holland flower? a. | alstroemeria | c. | marigold | b. | chrysanthemum | d. | all the above | | | | |
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| 21. | If the
greenhouse fan needs servicing, you first should
? a. | take the fan guard off,
then disconnect the hot wire from the motor. | b. | take the fan guard off,
then disconnect the hot and ground wires. | c. | turn off the breaker switch at the switch panel
(SEP). | d. | make sure that the thermostat controlling the fan is set at its
maximum setting. | | |
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| 22. | Cindy said
she was Forcing mums. What is the likely interpretation of her comment ? a. | She was making a strong
effort to sell mums. | b. | She was pollinating them. | c. | She was making them
grow and bloom in an unnatural season. | d. | She was giving them their necessary cooling
period. | | |
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| 23. | Wilber Wilt
found several insects and pests in his greenhouse and asked you your thoughts on the seriousness of
the problem. Mr. Wilt should be most concerned about the
? a. | white
flies | c. | house
flies | b. | lady bugs | d. | sow bugs | | | | |
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| 24. | An example
of monochromatic color is
? a. | blue, light blue and
dark blue | c. | red, yellow and
green | b. | pink, dark pink and yellow | d. | red, yellow and pink | | | | |
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| 25. | Plugs are
the hot item in bedding plant production for the
1980's's because
? a. | of faster
transplanting. | c. | they grow off
faster. | b. | of less total labor. | d. | all the above. | | | | |
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| 26. | A key
disadvantage to using bedding plant plugs is that
? a. | much more germination
space is needed. | b. | the crop takes longer to grow to marketable
size. | c. | the roots are easier to damage during
transplanting. | d. | all the above | | |
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| 27. | One of the
big advantages of using metal instead of wood for greenhouse structures is that
? a. | it is
cheaper. | c. | it creates less
shadows. | b. | it is stronger | d. | all the above | | | | |
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| 28. | A very
effective insecticide but one that is highly lethal to humans is
? a. | temik | c. | benlate | b. | pentac | d. | captan | | | | |
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| 29. | Tim and
Brian were discussing a certain greenhouse plant. They were overheard to say that this plant came
from Mexico and that some of the popular varieties were Heggs. What plant were they talking
about? a. | chrysanthemums | c. | carnations | b. | alstroemerias | d. | poinsettias | | | | |
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| 30. | The number
one selling bedding plant in the United States is
? a. | petunia | c. | tomato | b. | marigold | d. | impatients | | | | |
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| 31. | Most of the
floral designs for funerals are made with
. a. | fresh
flowers | c. | silk
flowers | b. | plastic flowers | d. | Holland flowers | | | | |
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| 32. | A plant that
was traditionally grown from cuttings but has in recent years been propagated more and more from
seeds is
. Currently both methods of propagation of this plant are being used in the
industry. a. | petunias | b. | snake plant | c. | alstroemerias | d. | Geranium | | |
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| 33. | During which
seasons will black cloths not be needed for short day plants, assuming no interruption of the natural
day length? a. | fall and
winter | c. | winter and
spring | b. | spring and summer | d. | summer and fall | | | | |
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| 34. | The word
horticulture is a Latin word that means ... a. | grower of crops. | c. | Lover of plants | b. | a garden
cultivations | d. | Plant
cultivator | | | | |
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| 35. | Seeds are
composed of ... a. | seed coat, endosperm,
and an embryo. | c. | an eye, starch, and
seed coat. | b. | endosperm, a root, and a stem. | d. | an embryo, starch and endosperm | | | | |
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| 36. | The best
temperature for the germination of most seeds is
. a. | 50 to 60 degrees
F | c. | 85 to 90 degrees
F | b. | 65 to 75 degrees
F | d. | 80 to 85 degrees
F | | | | |
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| 37. | Why are
hybrid seed so much more expensive than non-hybrids? a. | More labor involved is
involved in the production of hybrids. | b. | A lot of expensive research goes into the development of
hybrids. | c. | Hybrids are superior to non-hybrids and demand for them is
high. | d. | All the above | | |
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| 38. | The first
part of the new plant to emerge from the seed is the
. a. | root | c. | stem | b. | leaves | d. | endosperm | | | | |
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| 39. | Azaleas are
propagated commercially by
in
. a. | seeds; the
fall | c. | cuttings; spring -
summer | b. | seeds; the spring | d. | cuttings; after the last frost | | | | |
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| 40. | Overhead
watering systems are most successful when ... a. | the plants are the same species and are the same
size. | b. | the plants are in the same size pots. | c. | the same soil mix is
used for all the plants. | d. | all the above. | | |
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| 41. | Which
material is rarely used in modern culture of potted horticultural crops at the commercial level
? a. | manure | c. | compost | b. | topsoil | d. | all the above | | | | |
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| 42. | LD50 refers
to... a. | the toxicity of
pesticides. | c. | a sterilizing
agent | b. | a kind of growth retardant. | d. | none of the above | | | | |
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| 43. | A thermal
blanket is
to conserve energy during winter. a. | pulled over the top of the greenhouse | b. | pulled over the top of
the crop inside the greenhouse | c. | placed under the pots to supply gentle bottom
heat | d. | none of the
above | | |
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| 44. | Which item
of environmental control may work with the cooling and heating system? a. | fan
jet | c. | humidisat | b. | louvers | d. | pads | | | | |
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| 45. | Which
statement about greenhouse temperature is true? a. | Day temperature should be the same as the night
temperature. | b. | Day temperature is as easy to control as night
temperature. | c. | Many plants are triggered to bloom by day
temperatures. | d. | Exact night temperature is more critical than day
temperature | | |
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| 46. | To mix a
cubic Yard of l:l:l soil you would add
Cubic
feet of each ingredient. a. | 9 | c. | 12 | b. | 27 | d. | None of these | | | | |
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| 47. | Simple
layering can be used to propagate
. a. | gardenia | c. | Bearded
iris | b. | Norfolk Island
pine | d. | Sprengeri
fern | | | | |
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| 48. | All the
following nutrients are needed by plants except: a. | N, P, K, Ca, Ma | c. | Fh, Mn, Cl, Lm | b. | C, H, O, P,
K | d. | CA, Mg, S,
Fe | | | | |
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| 49. | The process
of hardening-off plants can be accomplished by ... a. | decreasing
fertilizer. | c. | decreasing
water | b. | exposing plants to cooler
temperatures. | d. | all the
above | | | | |
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| 50. | Rex and
Richard were in business growing garden mums and delivering them to retailers. Their fixed cost of
production was $.30 per pot and the total variable cost was $.90 per pot. Due to uncontrollable
circumstances the market experienced a temporary down-turn in price and they were able to get only a
$1.10 per pot bid for their plants. There was no immediate alternative use for the crop so Richard
said ... a. | we should get a larger
truck. | b. | we should sell because we can recover some of our fixed
cost. | c. | we should not sell. It is never good practice to sell for less than it
costs to grow the crop. | d. | none of the above is the best alternative in this
situation. | | |
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