Greenhouse Management Online

Which are environmental parameters that one might control using a greenhouse?
1. Temperature
2. Light intensity
3. Photoperiod
4. Humidity
5. All of the above
Which are variables included in the "dead load" of a greenhouse structure?
1. Weight of structure
2. Framing
3. Glazing
4. Permanent equipment
5. All of the above
The duration that light is supplied to a crop is referred to as the:
1. Photon
2. Wavelength
3. Photoperiod
4. Skotoperiod
5. None of the above
When referring to the quality of light provided to a crop, one often refers to the:
1. Photon
2. Wavelength
3. Photoperiod
4. Skotoperiod
5. None of the above
Which are variables included in the "live load" of a greenhouse structure?
1. Glazing
2. Framing
3. Hanging baskets
4. None of the above
5. All of the above
Alkalinity and electrical conductivity (E.C) are two properties of which important environmental parameter of concern in greenhouse crops production?
1. Light
2. Humidity
3. Temperature
4. Water
5. None of the above
What is the basic difference between a cold frame and a hot bed?
1. A cold frame has higher side walls
2. A cold frame has shorter side walls
3. A cold frame has a heat source
4. A hot bed has a heat source
5. None of the above
For what purpose(s) is a cooler used?
1. Fruit and vegetable storage
2. Cut flower storage
3. Vernalization of bulbs
4. Stratification of seed
5. All of the above
For what purpose are growth chambers primarily used?
1. Vernalization of bulbs
2. Storage of cut flowers
3. Scarification of seed
4. plant science research
5. All of the above
For what purpose are germination chambers primarily used?
1. Germination of seeds for plug production
2. Vernalization of bulbs
3. Scarification of seed before germination
4. Seed storage
5. None of the above
What is basic feature of a ridge-and-furrow greenhouse structure?
1. Roof sections connected to form continuous span
2. Lack of interior walls
3. Generally unobstructed interior space
4. Reduced total surface area per square foot under cover
5. All of the above
A ridge-and-furrow greenhouse is also commonly referred to as what type of structure?
1. quonset-quonset
2. A-frame
3. Hoop house
4. Gutter-connected
5. None of the above
A quonset style structure gains strength from :
1. Trusses used to form the roof and side walls
2. The strength of an arch
3. Steel uprights used to anchor trusses
4. A concrete pad
5. None of the above
What is an advantage of a ridge-and-furrow structure as compared to numerous single-span greenhouses?
1. Provides a larger unobstructed interior
2. Reduced live load
3. Reduced dead load
4. Better light transmission
5. All of the above
When growing greenhouse crops, the rooting medium is also commonly referred to as the:
1. Substrate
2. Suberizate
3. Subsoil
4. Dendrite
5. None of the above
Fog or mist systems are often used to increase the humidity in a controlled environment for which purpose?
1. Scarification of seed
2. Rooting of cuttings
3. Vernalization of bulbs
4. Manipulation of photoperiod
5. None of the above
Greenhouse structures may be built from:
1. Steel
2. Wood
3. Aluminum
4. Concrete
5. All of the above
Which is NOT a consideration when selecting a site to locate a greenhouse operation?
1. Topography
2. Land-use predictions
3. Climate
4. water availability
5. None of the above
The non-translucent section of the lower portion of the greenhouse wall is called the:
1. Extension wall
2. Curtain wall
3. Blank wall
4. Block wall
5. None of the above
What materials may be used to construct greenhouse floors?
1. Portland cement
2. Porous concrete
3. Gravel
4. Compressed soil covered with a polypropylene fabric
5. All of the above

Greenhouse Management Online

Unit 1Design and ConstructionSelf-Test

Unit 1

Design and Construction

Self-Test