ASM 1020
Second Examination
Study Questions
Fall 2004

1. What is the purpose of the vane on a vaned axial fan?
  A.To lower or raise temperature.
  B.To flow twice the amount of air.
  C.To give the a vortex, swirling effect.    <
  D.To cancel the vortex effect.
 
2. What is the ideal moisture percent for corn?
  A.18%
  B.16.5%
  C.15%
  D.15.5%   <
 
3.To fix the majority of wet spots at the bottom of a bin what should be done?
  A.Get a new bin.
  B.Leave the grain uncovered and outside for a week.
  C.Fill with approximately 4ft. of pre-dried grain.    <
  D.Nothing 

1.         When we say that grain if hygroscopic, we mean what?

 

a)      that the grain allows air to pass through it

b)      that grain can give off or receive water depending upon the humidity

c)      that grain can neither give or receive water

-         correct answer, B.

 

2.         A statius point is _____________?

 

a)      the grains per pound

b)      the approx. wet bulb temperature reading

c)      the spot where the dry bulb and RH % intersect

-         correct answer, C.

 

3.         The grain handling system to dry grain that is most common to this part of the state and our type of agriculture would be___________________?

 

a)      In Bin – Continuous Flow

b)      Portable Batch

c)      Portable Continuous Flow

-         correct answer, A.

which of the following are types of drying fans?
A. Blower fan
B. House fan
C. Axial fan
D. Box fan
Answer: C
 
Which of the following are not on a psychrometrics chart?
A. Grain weight
B. BTU
C. specific volume
D. Dry Bulb temperature
Answer: A
 
What is dry bulb temperature?
A. Determined by wrapping a wet sock around a thermometer.
B. Amount if water in the air.
C. Temperature of the air measured with a standard thermometer.
D. The temperature when moisture condenses and cant remain in air.
Answer: C

1.  The ratio of the amount of water in the air as compared to the amount of water that the air could hold if fully
     saturated is called __________.
                       A.  Moisture Content
                       B.  Dew Point
                       C.  Relative Humidity
                       D.  Maximum Retentive Capacity
     Answer: C
 
2.  Specific Volume is the volume of space occupied by a pound of dry air at standard atmospheric pressure. 
     What is standard atmospheric pressure?
                       A.  3.14 PSI
                       B.  14.7 PSI
                       C.  640 atm
                       D.  36 PSI
      Answer: B
 
3.  The term used to describe a drying system that involves increasing the temperature of the air 10 degrees
     above ambient air temperature is __________.
                        A.  Low Temperature Drying
                        B.  High Temperature Drying
                        C.  Ambient Drying
                        D.  Natural Air Drying

With a Batch in Bin drying system there is a maximum depth of ______ feet of grain.
A. 1
B. 2
C. 4
D. 6
Correct answer C.
 
If you have a low temperature drying system then the temperature in the bin is ________ degrees above ambient.
A. 5
B. 10
C. 20
C. 30 
Correct answer B.
 
A Portable Continuos Flow System is
A. easily moved
B. used for grain storage.
C. one of the most popular methods.
D. really not that portable.
Correct answer D.


1.  What is a staces point?
 
A. a point on a road
B. the place in which Stace lives.
C. point where first two of seven points meet.
D. the point where 8 points meet
 
2. What is wet basis?
 
A. ratio of total weight to total water
B. the base at which water is retained
C. the place where water is released
D. the point in which water is no more
 
3. What are the two types of bulb temperatures?
 
A. Blue and Red
B. Wet and Dry
C. Wet and Extremely wet
D. Hard and soft

1.  Since grain is hygroscopic, it can

            a.  take in moisture

            b.  give off moisture

            c.  both of the above

            d.  none of the above

2.  Water holding capacity of air about doubles for every ____º F increase in temperature. 

            a.  10

            b.  20

            c.  30

            d.  35

3.  Wet basis for moisture content is always a(n)  _____ percent when compared to dry basis. 

            a.  smaller

            b.  larger

            c.  equal

            d.  these are not measurement for moisture content


1. What type of conveyor system would you use to get seed corn into a bin? 
A. Auger
B. Rubber Belt - Correct
C. Shovel
D. None of the above
 
2. What is the lowest test weight on corn before being docked money. 
A. 57
B. 52
C. 54- Correct
D. 56
 
3. When modifying storage to extend shelf life of biological products you don't want to damage its: 
A. Color
B. Taste 
C. Texture
D. All of the Above- Correct
1. Which of the following is not a living organism?
     A. Grain
     B. Steak
     C. Vegetables
     D. Fruits
 
2. Which of the following types of drying grain is best suited to systems with low harvest volumes and slow harvest rates?
     A. Layer Drying
     B. Batch-in-bin Drying
     C. Portable Batch
     D. In-bin Continuous Flow
 
3. What term refers to the temperature that moisture condenses to the point that it can no longer remain suspended in the air?
     A. Moisture content
     B. Wet bulb temperature
     C. Relative humidity
     D. Dew point
1. When low temp. drying, how many degrees do you increase the temp?
A. 5  B. 10  C. 15  D. 20
Answer B.
 
2. Layer drying is best suited for
A. low harvest volumes  B. high harvest volumes
Answer A.
 
3. Are portable continuos flow bin used for storage?
A. yes  B.no
Answer B.

1.) How much is a pound of dry air at standard atmospheric pressure?
       a.) 15 psi
       b.) 13 psi
       c.)14.5 psi
       d.) 14.7 psi
 
2.) What is the point where you find the first two points on the psychometric chart?
       a.) Statia Point
       b.) State Point
       c.) Statious Point
 
3.) Water holding capacity of air essentially doubles for each       degree F increase in temperature.
      a.) 10
      b.) 30
      c.) 15
      d.) 20

1. Which drying system does not use heat?

A)    Natural

B)    Low Temp.

C)    Batch-in-bin

D)    Layer drying

2. With a low temp dryer how many degrees does the fan cool about ambient temp?

            A) 20

            B) 15

            C) 10

            D) 25

  1. Which fan in generally quieter, but more expensive when drying grain?

A)    Vane Axel

B)    Axil Flow

C)    Centrifugal

D)    Ceiling fan


1.      Which of the following is not a drying system discussed in class.

a)      collective

b)      natural 

c)      low temp

d)      continuous    

 

Answer: A

 

2.       What is one of the basis that moisture is measured?

a)      wet basis

b)      heat basis

c)       cull basis

d)      moisture measure basis

Answer:  A

 

3.      What kind of floor will help improve air circulation within a bin?

a)      wood plank floor

b)      perforated floor

c)      a three vent floor

d)      a vent in the man whole of the bin.    

 

Answer:  B



1.) Grain is____________.
      a.) Horoscopic
      b.) Hydroscopic
      c.) Hygroscopic
      d.) Hydroporus
 
2.) 1 batch = _________ of depth.
      a.) 2'-4'
      b.) 5'-8'
      c.) 10'-12'
      d.) 12"-18"
 
3.)  Which group contains a form of drying that is not real?
      a.) Natural Air, Low temperature,
      b.) Layer, Portable Batch,
      c.) In-Bin Continuous flow, External Temperature flow
      d.) Batch-in-Bin, Portable continuous flow

Drawing a straight line to the left from the stasis point gives you what value?
a. Wet Bulb
b.Dew Point *
c.Dry Bulb
d. grains/# of water
 
What does hygroscopic mean?
a. The ability to hold water
b. The ability to give off water
c. Both *
d. Neither
 
What is specific volume measured in on the psychometric chart?
a. Cubic feet *
b. Pounds
c. Cubic Meters
d. Grains per pound of water

1.  Of the two forms used to measure temperature, which will always read a lower degree?
 
A. Dry Bulb
B. Wet Bulb *
 
2.  For all practicable purposes what is the common weight measurement for a bushel of corn?
 
A. 52 lbs.
B. 54 lbs.
C. 56 lbs.  *
 
3.  When using Low Temperature drying, the temperature should be _______ degrees above dry bulb.
 
A. 5 degrees
B. 10 degrees  *
C. 15 degrees


What are the two ways moisture content is expressed/ measured?

A) Dry Basis & Wet Basis*   B) Dry Bulb& Wet Bulb   C) Dry basis& Wet Bulb

D) Wet Bulb & Dry basis

When obtaining a wet bulb reading, what can be used to cover the bulb of the thermometer?

A) Plastic B) Burlap C)  Gauze*  D)  Nothing

What would be the # of water on a wet basis if the volume of grain weighed 50 pounds and the grain is 20% wet?

A)  20#   B)  15#  C)  10# *  D)  14# 



1.  The _________________ temperature is the temperature of the air measured with a  standard thermometer.

A.     Dry bulb         ***

B.     Wet bulb

C.     Standard

D.     Normal

 

  1. Grain is ________________ meaning it can absorb and release water.
    1. Hygroscopic            ***
    2. Microscopic
    3. Hydrophobic
    4. Psychometric

  1. In low temp drying the ambient temperature is raised by _________ degrees?
    1. 20
    2. 5
    3. 15
    4. 10       ***

1.  What measure is Total Heat Content expressed ass?
  A. BTU
  B. grains
  C. meters
  D. degrees
  
2. When visiting the elevator do drop off a load of grain you are told your load is 14.5% moisture this is measured on a ________ basis.
A. dry
B. material
C. wet
D. weight
 
3. why would you run a fan on your bin when the humidity is very high.
A. to dry the grain slowly but surely
B. to rewet overly dry grain
C. because your low temp heater quit
D. none of the above.


What is the normal temp increase on a low temp drying system?
A.) 5 deg
B.) 10 deg
C.) 15 deg
D.) 20 deg
 
When is the best time to dry your grain using a natural air drying system?
A.) 45% R.H.
B.) 70% R.H.
C.) 65% R.H
D.) 0% R.H.
 
What Measures ambient temperature?
A.)Dry Bulb
B.) Wet Bulb
C.) Relative Humidity
D.) Dew Point

How many degrees above the air temp. does a low temp heater heat?
A. 20 degrees f.
B. 15 degrees f.
C. 10 degrees C.
D. 10 degrees f.
answer:D
 
Ambient temperature is the same as...?
A. Dry Bulb Temp
B. Wet Bulb Temp
C. Air Temp
D. A and C
answer: D
 
The Batch-in-bin storage max depth is ?
A. 10 ft.
B. 4 ft.
C. 2 ft
D. 7 ft
answer : B


Is the total heat energy in the air, expressed as BTU/pound of dry air.
A   total heat content
B     heat
C     Hot temperature
D     moisture content
 
Point where the 1st to factors meet on psychrometric chart.
A    Stacies point
B     Factor point
C     cross point
D  intersection
 
______________ grains of water equals one pound
 
A    7000
B    6000
C    700
D    600
  
 The answer is A for all three

1.)  Which type of drying process uses a 10 degree increase in heat?  C.
         A. In bin continuos flow
         B. Portable Batch
        C. Low Temperature
         D. Layer Drying
 
2.)When you modify storage to extend shelf life you take a chance of damaging?  B.
        A. Size
        B. Texture
       C. Price
       D. Moisture Content
 
3.) The point at which air is cooled that moisture condenses and can no longer be suspended in the air is?  D.
       A. Dry Bulb Temperature
       B. Wet Bulb Temperature
       C. Relative Humidity
       D. Dew Point

1) In low temp drying, how much do you increase the temp above ambient conditions?
a. 10
b. 20
c. 30
d. 40
 
2) How deep should the grain be for "Batch in Bin" drying?
a. 3-6
b. 2-4
c. 1-2
d. 5-10
 
3) Water holding capacity doubles for each __ Degrees.
a. 20
b. 10
c. 30
d. 5

1. Dry basis is what?
A
A. ratio of dry feed to water
B. how dry the ground under you is
C. % of water in grain 
2. Wet basis is what?
C
A. ratio of dry feed to water
B. how dry the ground under you is
C. % of water in grain 
3. Why do we try to raise the moisture of grain?
B
A. for fun
B. More weight
C. better grain


Dry bulb temperature is:
 A. cooler than wet bulb temperature at 100 % humidity.
 B. warmer than dry bulb temperature at 100% humidity.
*C. the same temperature as wet bulb at 100% humidity
 D. cooler than wet bulb temperature at 75% humidity
 
Foundation Seed uses what type of elevator for transporting feed out of grain bins?
*A. slow moving elevator
 B. quick moving elevator
 C. a low stair step elevator
 
Enthalpy is measured in:
 A. Grains/Lb
*B. BTU
 C. degrees Fahrenheit
 D. ft-lb



What type of drying system uses small amounts of grain in bins and dried?
 
A. Low Temp
B. Batch in Bin
C. Layer Drying
D. Natural Air drying
Answer B
 
What type of drying system is not used for storage?
 
A. Natural drying
B. Low Temp
C. Layer drying
D. Portable Batch
Answer D
 
What does low temp drying mean?
 
A. Drying the grain in the field
B. Drying the grain by adding 10 degrees heat
C. Drying the grain by freezing
D. Drying the grain with a hair dryer
correct answer B



1.)  Wet Basis is:
      A.)  water compared to the weight of grain if oven dried
      B.)  water compared to the weight of total grain saturation
      C.)  water compared to total weight of grain
      D.)  All of the above are the same and are correct
 
2.)  Grain is hygroscopic, this means that
      A.)  it only takes in water depending on humidity
      B.)  it only gives out water depending on temperature
      C.)  it gives out water and takes in water depending only on temperature
      D.)  it is able to take and give water depending on temperature and humidity
 
3.)  In order to make water holding capacity in the air double the temperature outside much reach at least what temperature if it is 45 degrees outside.
     A.)  at least 50 degrees
     B.)  at least 62 degrees
     C.)  at least 25 degrees
     D.)  at least 65 degrees

1.  In a low temp drying system, the temp is raised_________?
A. 25 degree
B. 15 degree
****C. 10 degree****
D. 5 degree

2.  A vane axle fan does what to the incoming air?
a.  heats it
b.  cools it
****c.  puts in a vortex, or spirals it****

3.  Total heat content is is a measurement of
a.  degree F
b.  degree C
c.  % humidity
****d.  BTU/lb of dry air****

The End