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Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. |
| | 1. | Air speed is increased as it passes through the carburetor because of the: | a. | high speed jet | b. | venturi | c. | float | d. | economizer | | | | | | | | | | |
| | 2. | One of the purposes of a crankcase breather is to: | a. | keep a partial vacuum in the crankcase | | b. | filter the air before it enters the carburetor | | c. | pressurize two-cycle engine crankcase | | d. | increase volumetric efficiency | | | | |
| | 3. | Ignition normally occurs: | a. | just after TDC on the power stroke | | b. | at the end of the exhaust stroke | | c. | at the end of the intake stroke | | d. | just before, or at the TDC of the compression stroke | | | | |
| | 4. | Increasing the tension of a governor spring will: | a. | increase engine speed | c. | hold the throttle in position better | | b. | decrease engine speed | d. | advance ignition timing | | | | | | |
| | 5. | The ratio of rotation of the camshaft to the crankshaft on a four stroke-cycle engine is: | a. | 1:1 | b. | 1:2 | c. | 2:1 | d. | 2:2 | | | | | | | | | | |
| | 6. | The SAE rating of a oil indicates its: | a. | viscosity | | b. | service classification | | c. | corrosion resistance | | d. | whether is used in gas or diesel engines | | | | |
| | 7. | The ratio of the total volume of the cylinder with the piston at BDC compared to the total volume with the piston at TDC is known as: | a. | clearance volume | c. | stroke | | b. | piston displacement | d. | compression ratio | | | | | | |
| | 8. | The storage capacity of condensers is measured in: | a. | volts | b. | ohms | c. | microfarads | d. | amps | | | | | | | | | | |
| | 9. | When measuring the gap of a used spark plug, a should be used. | a. | flat feeler gauge | c. | micrometer | | b. | vernier caliper | d. | wire of round feeler gauge | | | | | | |
| | 10. | The float height of float-type carburetors is adjusted by: | a. | bending the float arm | | b. | adding or removing carburetor bowl gaskets | | c. | adjusting the tab or tang on the float | | d. | adjusting the length of the float needle valve | | | | |
| | 11. | The API service rating of crankcase oils recommended for use in small gas engines is: |
| | 12. | Under normal conditions, an oil- foam air cleaner should be cleaned every hours. |
| | 13. | If there is not sufficient valve tappet clearance in engines that do not have adjustable tappets, it is obtained by: | a. | grinding the end of the tappet | c. | grinding the end of the valve stem | | b. | adjusting the lockout assembly | d. | grinding the rocker arm | | | | | | |
| | 14. | A partially sheared flywheel key may result in a hard starting engine because the: | a. | valve timing may be advanced | c. | ignition points do not open correctly | | b. | ignition timing is not correct | d. | armature air gap is too close | | | | | | |
| | 15. | A manufacture of two-cycle engines recommends mixing fuel to oil with a 32:1 mixture. How much oil should be mixed with 5 gallons of fuel? | a. | 8 ounces | b. | 16 ounces | c. | 20 ounces | d. | 24 ounces | | | | | | | | | | |
| | 16. | The slow-moving vehicle (SMV) emblem identifies machinery that normally travels slower than: | a. | 30 MPH | b. | 25 MPH | c. | Posted Speed | d. | 35 MPH | | | | | | | | | | |
| | 17. | A class “A” fire extinguisher should be used on which of the following: | a. | ordinary combustibles like paper, wood, ect. | | b. | Flammable liquids like gasoline, diesel fuel, and grease | | c. | fires involving electrical equipment | | d. | fires involving metals | | | | |
| | 18. | Which of the following guards are designed for use in down, damp, heavy crops? | a. | rock guards | c. | Lipless guards | | b. | regular guards | d. | two-tined or double guards | | | | | | |
| | 19. | The density of a bale is set by adjusting the: | a. | needles | b. | tension bars | c. | hay dogs | d. | measuring wheel | | | | | | | | | | |
| | 20. | Which statement best describes the correct time for baling with a round bale? | a. | Bale as quickly as possible after mowing to retain maximum weight and nutrient valve. | | b. | A good rule of thumb is to use the same moisture content as is acceptable for baling hay with conventional square balers. | | c. | To prevent internal molding because bales are much larger, hay should be allowed to dry and cure one day longer than is acceptable with conventional square balers. | | d. | It really does not matter because most round balers are stored outside and the hay will continue to dry out if needed. | | | | |
| | 21. | On a cutter bar mower, the ledger plates serve: | a. | As dividers for the plants as they enter the cutting area | | b. | As one of the cutting edges | | c. | Only as a wear surface | | d. | None of these choices are correct | | | | |
| | 22. | There is a potential for injury or death when working or operating around any type of agricultural machinery including hay equipment. Of the signal words used with safety-alert symbols to draw attention to potentially unsafe areas, which word(s) is (are) used to indicate the most serious potential hazard is present? | a. | Danger! | c. | Caution! | | b. | Warning! | d. | Attention! Be Alert! | | | | | | |
| | 23. | For most efficient operation, hay should be raked: | a. | Immediately after mowing to prevent leaf shatter. | | b. | Only when it is dry enough to bale. | | c. | In the same direction as the crop was cut with the mower. | | d. | In the reverse direction as the crop was cut with the mower. | | | | |
| | 24. | What is the purpose of a hay crimper of crusher? | a. | to compact the material to a smaller space | | b. | to decrease field drying time | | c. | make hay easier to chop | | d. | it is the first step in making pellets | | | | |
| | 25. | Reel speed of a mower conditioner should be: | a. | slightly slower than ground speed | | b. | exactly the same as ground speed | | c. | slightly faster than ground speed | | d. | dependent of if the crop i s down or tangled then it would be slower | | | | |
| | 26. | Which of the following methods of cutting is used by a disk mower to cut hay? | a. | shear | b. | impact | c. | tearing | d. | speed | | | | | | | | | | |
| | 27. | When unplugging a reel on a hay conditioner: | a. | The tractor should be in neutral and the PTO off. | | b. | The tractor should be in park and the PTO off. | | c. | The tractor engine should be shut off. | | d. | The tractor engine and PTO should be shut off. | | | | |
| | 28. | On a small square baler the bale weight is not determined by: | a. | spring tension on the bale chamber | c. | moisture content of the material | | b. | twine tension adjustment | d. | type of material | | | | | | |
| | 29. | Which of the following is not a part of a square baler knotter? | a. | needle | b. | bobbin | c. | bill hook | d. | knife | | | | | | | | | | |
| | 30. | When operating a forage harvester, which of the following is (are) a probable cause of ragged cut ends or excessive cob lengths? | a. | dull cutter head knives | | b. | dull shear bar (stationary knife) | | c. | excessive knife-to-shear bar clearance | | d. | all of these will cause ragged cut ends or excessive cob lengths | | | | |
| | 31. | Load-carrying capacity of rectangular lumber members, with ends supported, is greatest when: | a. | installed on edge | | b. | installed flatwise | | c. | placed in either position because both have the same load-carrying capacity | | d. | placed as a plank | | | | |
| | 32. | A building component that spans door or window openings is called a: | a. | still | b. | cripple | c. | plate | d. | header | | | | | | | | | | |
| | 33. | Correct installation of shingles includes: | a. | use redwood or cedar | | b. | double the starting course at the roof edge | | c. | placing up to one-half the shingle exposed to weather | | d. | all of these are correct | | | | |
| | 34. | Framing anchors are used to: | a. | reduce the number of fasteners in a building | | b. | increase the length of framing members | | c. | increase the strength of joint connections | | d. | increase the strength of framing members | | | | |
| | 35. | A truss rafter supports a heavy load because it is composed of members assembled to form: | a. | one or more triangles | c. | one or more boxes | | b. | one or more rectangles | d. | one or more planes | | | | | | |
| | 36. | An advantage of pole building construction is: | a. | extra roof support from interior structural members | | b. | that it can be easily remodeled to more than one story in height | | c. | the capacity to withstand lateral pressure on walls | | d. | that it is less expensive due to the minimal foundation requirement | | | | |
| | 37. | The chemical reaction that causes concrete paste to harden is called: | a. | aeration | b. | chemigation | c. | hydration | d. | reagentation | | | | | | | | | | |
| | 38. | Air-entrained concrete should be used for all construction that will be exposed to: | a. | warm and moist soil | | b. | hot and dry soil | | c. | freezing, thawing, and deicing | | d. | heavy loads | | | | |
| | 39. | The water:cement ratio of a concrete mix is and indictor of: | a. | durability and resistance to freeze-thaw action | | b. | compressive strength | | c. | water-tightness | | d. | all of these are correct | | | | |
| | 40. | A mixture of concrete recommended for good workability and water tightness should not exceed: | a. | three gallons of water per sack mix | | b. | four gallons of water per sack mix | | c. | five gallons of water per sack mix | | d. | six gallons of water per sack mix | | | | |
| | 41. | Concrete surfaces for outside walkways and for confined water tightness should not exceed: | a. | a steel trowel | c. | a steel float and wood trowel | | b. | a magnesium trowel | d. | a course broom | | | | | | |
| | 42. | Concrete is reinforced to compensate for relatively low: | a. | compressive strength | c. | consistency | | b. | tensile strength | d. | slump | | | | | | |
| | 43. | The standard cure time for concrete strength comparison for tests is: | a. | three days | c. | twenty on days | | b. | fifteen days | d. | twenty eight days | | | | | | |
| | 44. | When set in place with mortar, the dimensions of a standard masonry unit: | a. | all increase to nominal sizes | | b. | for length and width, increase to nominal sizes | | c. | for width and height , increase to nominal sizes | | d. | remain the same so that the sum of the block lengths equals wall length | | | | |
| | 45. | Concrete blocks should always be installed when: | a. | dampened | | b. | thoroughly dry | | c. | well cured | | d. | thoroughly dry & well cured are correct | | | | |
| | 46. | The agency responsible for testing of electrical wiring materials to ensure that these products meet specific minimum standards is the: | a. | NEC-National Electric Code | | b. | NEPA- National Fire Protection Association | | c. | UL- Underwriters Laboratory | | d. | MWPS- Midwest Plan Service | | | | |
| | 47. | The electrical symbol, S4, denotes which of the following? | a. | An electrical wall plate containing 4 duplex receptacles banked together. | | b. | An electrical wall plate containing 4 single pole switches | | c. | A 4 way switch | | d. | All of these are correct. | | | | |
| | 48. | The circuits found in the home that supply power for lighting, radios, television, vacuum cleaners, and other 15 amp receptacles are properly referred to as: | a. | small appliance circuits | | b. | general purpose branch circuits | | c. | individual circuits | | d. | feeder circuits | | | | |
| | 49. | Which of the following describe the proper size conductor and overcurrent protection for the small appliance circuits found in the kitchen and laundry room? | a. | AWG 14, 15 amp | c. | AWG 12, 20 amp | | b. | AWG 12, 15 amp | d. | AWG 10, 30 amp | | | | | | |
| | 50. | A circuit that is wired directly from the SEP to only one item such as a 220 volt AC transformer welder is correctly identified as a/and: | a. | Ampacity circuit | | b. | Appliance circuit | | c. | General purpose branch circuit | | d. | Individual branch circuit | | | | |
| | 51. | The proper name for the tool that removes the outer sheathing on NM type cable is called a: | a. | Wire stripper | b. | Wire ripper | c. | Cable stripper | d. | Cable ripper | | | | | | | | | | |
| | 52. | A portable electric drill requires 115 volts and draws 3 amps. The resistance is this motor should be: | a. | 345 ohms | b. | 345 watts | c. | 38.3 watts | d. | 38.3 ohms | | | | | | | | | | |
| | 53. | Electric rates are 7.5 cents per kwhr. A 120 volt portable heater rated at 7.8 amps is operated 24 hours a day for 30 days. What is the cost of operating this heater over the 30 day period? | a. | $70.20 | b. | $673.92 | c. | $50.54 | d. | $5.05 | | | | | | | | | | |
| | 54. | Electrical pressure is expressed by the term: | a. | wattage | c. | ohms or resistance | | b. | kilowatt | d. | voltage | | | | | | |
| | 55. | On 120 volt circuits, controls (switches - circuit breakers) are connected in the: | a. | Equipment grounding conductor | c. | Grounded (neutral) conductor | | b. | Ungrounded conductor | d. | None of these are correct | | | | | | |
| | 56. | Which of the following does not affect the resistance of an electrical conductor. | a. | the type of material it is made of | | b. | The size or cross-sectional area of the conductor | | c. | The length of the conductor | | d. | Type of insulation covering the conductor | | | | |
| | 57. | Ground fault circuit interrupters are required when wiring a new home. The National Electric Code requires that certain 120 volt wall outlets in the following areas have this type of protection. | a. | Bathrooms | c. | Near kitchen sinks | | b. | Attached garages | d. | All of these are correct | | | | | | |
| | 58. | A 225 volt heater that draws 13.6 amperes will used the following amount the power. | a. | 16.5 watts | b. | 2.4 kw | c. | 3.1 kw | d. | 254 kw | | | | | | | | | | |
| | 59. | Which of the following is true regarding a series circuit? | a. | the voltage is equal throughout the circuit | | b. | the amperage is equal throughout the circuit | | c. | the resistance is equal throughout the circuit | | d. | All of the above are correct | | | | |
| | 60. | The two types of 3-phase electrical systems are: | a. | series and parallel | c. | step up and step down | | b. | resistance and inductive | d. | delta and wye | | | | | | |
| | 61. | A molecule of acetylene is composed of: | a. | carbon and hydrogen | c. | carbon and oxygen | | b. | hydrogen and oxygen | d. | carbon monoxide and hydrogen | | | | | | |
| | 62. | The oxy-fuel welding gas that produces the highest temperature flame when combined with oxygen is: | a. | propane | b. | MAPP | c. | acetylene | d. | natural gas | | | | | | | | | | |
| | 63. | The oxy-acetylene cutting process, metal is: | a. | oxidized | b. | hydrolyzed | c. | melted | d. | coalesced | | | | | | | | | | |
| | 64. | When selecting an oxy-acetylene welding tip for a specific job, the first factor to consider is: | a. | required oxygen pressure | | b. | metal thickness | | c. | required oxygen pressure | | d. | orfice size | | | | |
| | 65. | flows from the center of the orfice of an oxy-acetylene cutting nozzle. | a. | Oxygen | c. | Acetylene | | b. | Oxygen and acetylene | d. | Oxygen or acetylene | | | | | | |
| | 66. | Acetylene gas is: | a. | heavier than air | b. | colorless | c. | odorless | d. | non-flammable | | | | | | | | | | |
| | 67. | Oil is never used to lubricate the oxy-acetylene welder because it can: | a. | contaminate the weld gaskets | c. | deteriorate seals & gaskets | | b. | clog small openings | d. | cause a fire or explosion | | | | | | |
| | 68. | What is the maximum safe hourly withdrawal rate ( ft 31 / hr. ) from a 125 ft3 acetylene cylinder? | a. | 10.8 ft3 | b. | 24.8 ft3 | c. | 17.8 ft3 | d. | 31.8 ft3 | | | | | | | | | | |
| | 69. | A prevents the backflow of oxygen or acetylene into the hoses. | a. | flash arrestor | | b. | reverse flow check valve | | c. | backflow valve | | d. | positive pressure differential valve | | | | |
| | 70. | The welding technique is used when welding steel 1/8” or thinner by the oxy-acetylene welding process. | a. | backhand | b. | forehand | c. | downhand | d. | uphand | | | | | | | | | | |
| | 71. | Which of the following is not a function of the flux on a brazing rod? | a. | remove surface oxides | | b. | aid in capillary action | | c. | prevent atmospheric contamination | | d. | promote tinning of base metal | | | | |
| | 72. | The type oxy-acetylene flame having the highest temperature is the flame. | a. | pure acetylene | c. | neutral | | b. | carburizing | d. | oxidizing | | | | | | |
| | 73. | An oxygen cylinder valve should be completely opened while in use to allow: | a. | unrestricted oxygen flow | | b. | proper regulator operation | | c. | backseating of the cylinder valve | | d. | all of these are correct | | | | |
| | 74. | Plasma-arc welding produces a temperature of approximately ºF. | a. | 10,000 | b. | 30,000 | c. | 20,000 | d. | 40,000 | | | | | | | | | | |
| | 75. | The most likely cause of top edge melting during oxy-acetylene cutting is: | a. | the travel speed too fast | | b. | that pre-heat flames are too close | | c. | irregular travel speed | | d. | a malfunctioning cutting tip | | | | |
| | 76. | Water drainage from the soil surface is usually accomplished by: | a. | constructing terraces | | b. | planting on the contour | | c. | installing drainage pipes | | d. | land grading or shallow ditch | | | | |
| | 77. | For fertilizer and herbicides to be applied through an irrigation system, they must be: | a. | made of liquid and be emulsifiable | | b. | water soluble and emulsifiable | | c. | made of powdery substance | | d. | made of a liquid substance | | | | |
| | 78. | The purpose of the orfice in a pressure pump-type irrigation system is to: | a. | break down the chemical being applied | | b. | meter the rate of flow of the water | | c. | emulsify the chemical being applied | | d. | liquify the chemical being used | | | | |
| | 79. | The primary purpose of the pressure regulator in a pressure pump type of irrigation system is to: | a. | regulate the pressure at which the chemical is being applied | | b. | mix air with the solution in the chemical tank | | c. | prevent the chemical from returning to the tank | | d. | allow excess solution to return to the tank | | | | |
| | 80. | An acre-inch of water is correctly described as: | a. | water one inch deep covering a one acre area. | | b. | one cubic inch of water over a one acre area | | c. | one square inch of water over a one acre area | | d. | one cubic centimeter of water over a one acre area. | | | | |
| | 81. | Determine the amount (acre-inches per day) of water needed for a 50 acre corn crop that is a daily peak-use rate of .20 inches. |
| | 82. | A creek is 6 feet wide and has an average depth of 9 inches, what is the cross-sectional area of the stream? | a. | 4.5 ft2 | c. | 5.4 ft2 | | b. | 8.0 ft2 | d. | 9.6 ft2 | | | | | | |
| | 83. | Which of the following soil type has the highest water intake rate? | a. | fine | b. | course | c. | medium | d. | peats and muck | | | | | | | | | | |
| | 84. | A multi-sprinkler, tractor moved irrigation system, should not exceed percent slope during operation. |
| | 85. | The level land type of surface irrigation system, is limited to a slope of less than . | a. | .1 percent slope | c. | .3 percent slope | | b. | .2 percent slope | d. | .5 percent slope | | | | | | |
| | 86. | Emitters are used on which type of irrigation system? | a. | surface | b. | trickle | c. | sprinkler | d. | subirrigation | | | | | | | | | | |
| | 87. | In irrigation calculations, what is the reference crop to which water comparisons are made for other crops? | a. | corn | b. | wheat | c. | alfalfa | d. | clover hay | | | | | | | | | | |
| | 88. | What is the erosion control method normally used to protect the soil when regular crops are not being grown on a tract of land? | a. | vegetative crop | c. | strip cropping | | b. | crop rotation | d. | cover crop | | | | | | |
| | 89. | Which of the following is a source of nonpoint pollution? | a. | feedlots | c. | sediment from croplands | | b. | milking centers | d. | pesticide disposal sites | | | | | | |
| | 90. | The type of erosion that forms washes or channels when the water concentrates into small rivulets in the field is called: | a. | rill erosion | c. | sheet erosion | | b. | gully erosion | d. | steam bank erosion | | | | | | |