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DESIGN OF AGRICULTURAL MACHINERY - A.T. Belonio and D.A.H. Belonio > PULLEY AND BELT DRIVES > Flashcards

PULLEY AND BELT DRIVES Flashcards

1
Q

An engine is to be used to drive a hammer mill to run at 3,000 rpm speed. How would you couple the hammer mill to the engine?

a. By directly connecting the engine to the mill and increase the throttle rpm of the engine.
b. By connecting the engine to the mill using belt and pulley drive to reduce its speed while running the mill at 3000 rpm.
c. By running the mill at the engine optimum speed.
d. None of the above

A

b. By connecting the engine to the mill using belt and pulley drive to reduce its speed while running the mill at 3000 rpm.

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2
Q

If two shafts are perpendicular with each other, what type of drive system would you recommend?

a. Flat belt
b. V-belt
c. Sprocket and chain
d. All of the above

A

a. Flat belt

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3
Q

When one pulley is to be driven horizontally and the other pulley is to be driven vertically, what drive system would you recommend?

a. Open drive
b. Quarter-turn drive
c. Cross drive
d. All of the above

A

. Quarter-turn drive

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4
Q

If two parallel flat pulleys are to be driven in opposite direction, what drive would you recommend?

a. Open-belt drive
b. Cross drive
c. Quarter-turn drive
d. None of the above

A

b. Cross drive

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5
Q

The drive used to run perpendicular shafts.

a. Open-belt drive
b. Cross drive
c. Quarter-turn drive
d. None of the above

A

c. Quarter-turn drive

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6
Q

A machine element used to drive flat belts.

a. Pulley
b. Sprocket
c. Sheave
d. None of the above

A

a. Pulley

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7
Q

A pulley that is used to tighten the belt of a drive system.

a. Flat pulley
b. Idler pulley
c. V-pulley
d. None of the above

A

b. Idler pulley

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8
Q

Flat pulleys are usually provided with crown to ___.

a. prevent the belt from slipping
b. tighten the belt
c. increase the strength of pulley
d. None of the above

A

a. prevent the belt from slipping

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9
Q

Flat pulleys are crowned by making the center diameter larger than the edge diameter by ___.

a. 1/8 in. per foot of face width
b. 1/8 in. per foot of the pulley diameter
c. 1/8 in. per foot of the belt with
d. None of the above

A

b. 1/8 in. per foot of the pulley diameter

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10
Q

If the driver pulley diameter is increased, the speed of the driven pulley will___.

a. decrease
b. increase
c. rotate at the same speed
d. None of the above

A

b. increase

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11
Q

The commonly used belt drive for engine-driven multi-pass rice mills.

a. Flat belt
b. V-belt
c. Groove belts
d. None of the above

A

a. Flat belt

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12
Q

The belt transmission suitable for cross-drive system.

a. V-belt
b. Timing V-belt
c. Flat belt
d. None of the above

A

c. Flat belt

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13
Q

When buying flat belts, the common parameters used are___.

a. width and thickness
b. width and ply number
c. width and weight
d. None of the above

A

b. width and ply number

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14
Q

The minimum allowance for face width of a flat pulley with under 305-mm belt width.

a. 25 mm
b. 51 mm
c. 76 mm
d. None of the above

A

a. 25 mm

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15
Q

The minimum allowance for face width of a flat pulley with over 610-mm belt width.

a. 25 mm
b. 51 mm
c. 76 mm
d. None of the above

A

c. 76 mm

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16
Q

What is the length of arc of a V-belt on a 6-inches sheave with angle subtended by the arc of belts equal to 90 degrees (Problem 14)

a. 4.69 in
b. 3.49 in.
c. 6.94 in.
d. None of the above

A

a. 4.69 in

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17
Q

A flat-belt material which is resistant to oil and heat.

a. Rubberized-fabric belt
b. Reinforced-nylon chord belt
c. Canvass belt
d. None of the above

A

b. Reinforced-nylon chord belt

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18
Q

A type of flat belt that has the advantage of high-tensile strength to hold metal fasteners satisfactorily and has high resistance to deterioration due to moisture.

a. Rubberized-fabric belt
b. Reinforced-nylon chord belt
c. Canvass belt
d. None of the above

A

a. Rubberized-fabric belt

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19
Q

A 4inches-wide flat belt is to be used for driving 12 inches and 24 inches flat pulleys. What width of the pulleys would you recommend for the drive? (Problem 15)

a. 4 inches
b. 5 inches
c. 6 inches
d. All of the above

A

c. 6 inches

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20
Q

Compute the length of belt for the flat belt pulley having the following data:
Diameter of the larger pulley = 1800 mm;
Diameter of the smaller pulley = 400 mm; and
Center distance of the pulley shaft = 10 meters. (Problem 16)

a. 15 m
b. 23 m
c. 30 m
d. None of the above

A

b. 23 m

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21
Q

What is the length of the flat belt pulley drive with the following data?
Diameter of first pulley = 300 mm,
diameter of second pulley = 400 mm, and
center distance of the pulley shaft = 10 meters. (Problem 4)

a. 20.15 m
b. 21.05 m
c. 25.01 m
d. None of the above

A

b. 21.05 m

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22
Q

A diesel engine operating at 2500 rpm will be used to drive an irrigation pump, which turns at 1000 rpm. The pulley diameter for the pump is 4 inches. What is the recommended pulley diameter for the engine? (Problem 2)

a. 2 in.
b. 4 in.
c. 10 in.
d. None of the above

A

a. 2 in.

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23
Q

An irrigation pump is to be driven by a single-cylinder engine. The set-up has the following data:
Engine rpm=2200;
Pump rpm=1800; and
Diameter of Engine Pulley=25
cm.
What should the diameter of
the second pulley be? (Problem 3)

a. 35.05 cm.
b. 30.55 cm
c. 53.05 cm
d. None of the above

A

b. 30.55 cm

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24
Q

A gasoline engine runs at 2500 rpm. It will be used to drive a burr mill which turns at 500 rpm. The pulley diameter for the mill is 8 inches. What is the recommended pulley for the engine? (Problem 17)

a. 2 in
b. 4 in
c. 10 in
d. None of the above

A

a. 2 in

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25
Q

If a 10-Hp engine drive has 4.5 Hp belt capacity rating per belt, how many pieces of belts are needed for the drive?

a. 1 to 2 belts
b. 2 to 3 belts
c. 4 to 6 belts
d. None of the above

A

b. 2 to 3 belts

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26
Q

A centrifugal blower is to be driven by a gas engine. The set up specifications are as follows:
Engine speed =2200 rpm;
Blower speed=1800 rpm; and
Diameter of Engine Pulley=25 cm.
What should be the diameter of the pulley for the blower (Problem 18)

a. 28 cm
b. 31 cm
c. 61 cm
d. None of the above

A

b. 31 cm

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27
Q

If a sprocket is used for chain, a sheave is used for ___.

a. flat belt
b. gear
c. V-belt
d. All of the above

A

c. V-belt

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28
Q

A V-belt with B-32 specification means ___.

a. type B with circumferential length of 32 inches
b. type B with circumferential length of 32 cm
c. standard type V-belt whose strength is 32 times stronger than type B
d. None of the above

A

a. type B with circumferential length of 32 inches

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29
Q

The belt size designation for agricultural V-belts.

a. A, B, C, D, E
b. HA, HB, HC, HD, HE
c. AA-BB-CC-DD-EE
d. None of the above

A

b. HA, HB, HC, HD, HE

30
Q

Designations for standard V-belt are __.

a. A, B, C, D
b. HA, HB, HC, HD
c. AA-BB-CC-DD
d. None of the above

A

a. A, B, C, D

31
Q

The top width and the height of Type-B V-belt.

a. 13 mm x 8 mm
b. 16 mm x 10 mm
c. 22 mm x 13 mm
d. None of the above

A

b. 16 mm x 10 mm

32
Q

Which of the following V-belts is larger and stronger?

a. Type A
b. Type B
c. Type C
d. All of the above

A

c. Type C

33
Q

The commonly used V-belt in the Philippines for agricultural operations.

a. Type A
b. Type B
c. Type C
d. All of the above

A

b. Type B

34
Q

If some of the belts of a multiple V-belt drive are worn out, it is recommended that ___.

a. worn-out belts should be immediately replaced
b. wait until all belts are worn out before replacing them
c. all belts should be replaced
d. None of the above

A

c. all belts should be replaced

35
Q

The power rating of Type-B V belt.

a. 0.186 to 1.457 kw
b. 0.764 to 18.642 kw
c. 11.186 to 74.570 kw
d. None of the above

A

b. 0.764 to 18.642 kw

36
Q

A ribbed-type V-belt in which ribs are positioned across the belt length.

a. V-ribbed belt
b. Cogged belt
c. Timing belt
d. None of the above

A

b. Cogged belt

37
Q

Timing belt is commonly known as ___.

a. conventional flat belt
b. grooved belts
c. positive drive belt
d. All of the above

A

c. positive drive belt

38
Q

For variable-pitch sheaves, the recommended belts to be used are ___.

a. double v-belt
b. timing v-belt
c. adjustable-speed belt
d. None of the above

A

c. adjustable-speed belt

39
Q

The ASAE designation for adjustable speed V-belt is ___.

a. HA to HD
b. HAA to HCC
c. HI to HO
d. All of the above

A

c. HI to HO

40
Q

A ribbed-type V-belt in which the ribs are positioned along the belt length.

a. V-ribbed belt
b. Cogged belt
c. Timing belt
d. None of the above

A

a. V-ribbed belt

41
Q

A ribbed-type V-belt in which ribs are positioned across the belt length.

a. V-ribbed belt
b. Cogged belt
c. Timing belt
d. None of the above

A

b. Cogged belt

42
Q

The recommended drive to transmit power to a shaft located about 6 meters is ___.

a. Chain drive
b. Gear drive
c. V-belt drive
d. None of the above

A

d. None of the above

43
Q

A corn-sheller cylinder will be driven by a 10-hp diesel engine using V-belt drive. The engine has 1800 rpm speed while the corn sheller has 650 rpm required speed. The effective diameter of the driver pulley is 12 inches. What should be the diameter of the driven pulley (Problem 5)

a. 25 in.
b. 33 in.
c. 42 in.
d. None of the above

A

b. 33 in.

44
Q

Item 43.
A corn-sheller cylinder will be driven by a 10-hp diesel engine using V-belt drive. The engine has 1800 rpm speed while the corn sheller has 650 rpm required speed. The effective diameter of the driver pulley is 12 inches. What should be the diameter of the driven pulley
——————
What is the required length for the V-belt in Item 43 above, if the center distance between pulleys is 60 in.? (Problem 6)

a. 169 in.
b. 192.5 in.
c. 210 in.
d. None of the above

A

b. 192.5 in.

45
Q

Item 43.
A corn-sheller cylinder will be driven by a 10-hp diesel engine using V-belt drive. The engine has 1800 rpm speed while the corn sheller has 650 rpm required speed. The effective diameter of the driver pulley is 12 inches. What should be the diameter of the driven pulley
——————
If the belt in Item 43 above has a 4.5-hp capacity rating per belt, how many belts are recommended for the drive (Problem 8)

a. 1 belt
b. 2 belts
c. 4 belts
d. None of the above

A

b. 2 belts

46
Q

Item 43.
A corn-sheller cylinder will be driven by a 10-hp diesel engine using V-belt drive. The engine has 1800 rpm speed while the corn sheller has 650 rpm required speed. The effective diameter of the driver pulley is 12 inches. What should be the diameter of the driven pulley
——————–
What is the recommended shaft diameter for the drive in Item 43 above?

a. ½ in.
b. ¾ in.
c. 1 in.
d. None of the above

A

b. ¾ in.

47
Q

In the design of bucket elevator, it is recommended that the width of belt should be ___ than the pulley width.

a. larger
b. equal
c. smaller
d. None of the above

A

c. smaller

48
Q

A rice thresher is to be driven by a 10-hp gasoline engine using a V-belt drive. The engine speed is 1800 rpm while the thresher cylinder speed is 650 rpm. The diameter of the engine pulley is 4 inches. What will be the recommended diameter for the thresher’s pulley? (Problem 19)

a. 6 in.
b. 11 in.
c. 14 in.
d. None of the above

A

b. 11 in.

49
Q

Item 48.
A rice thresher is to be driven by a 10-hp gasoline engine using a V-belt drive. The engine speed is 1800 rpm while the thresher cylinder speed is 650 rpm. The diameter of the engine pulley is 4 inches.
——————-
What is the recommended size of the B-type V-belt needed for the drive in Item 48 above, if its center distance is 60 in.?

a. B169
b. B144
c. B196
d. None of the above

A

b. B144

50
Q

Item 48.
A rice thresher is to be driven by a 10-hp gasoline engine using a V-belt drive. The engine speed is 1800 rpm while the thresher cylinder speed is 650 rpm. The diameter of the engine pulley is 4 inches. What will be the recommended diameter for the thresher’s pulley? (Problem 19)
——————
The recommended size of the shaft for the thresher in Item 48 is ___.

a. ½ in.
b. ¾ in
c. 1 in
d. None of the above

A

b. ¾ in

51
Q

A three-pulley drive is used to deliver power at 1720 rpm speed from an electric motor to two components of a machine. The motor pulley has 4 inches diameter and the two machines have 6 inches and 8 inches pulley diameters, respectively. Neglecting the belt slip, what is the speed of the two pulleys?

a. 1146 rpm & 860 rpm
b. 1010 rpm & 840 rpm
c. 980 rpm & 760 rpm
d. None of the above

A

a. 1146 rpm & 860 rpm

52
Q

The transmission drive of a rice mill uses a standard 20 feet-long flat belt. The power source has 6 inches pulley diameter. The pulley diameter of the line shaft is 16 inches. What is the center distance required for the two shafts?

a. 24.7 ft
b. 20.3 ft
c. 8.55 ft
d. None of the above

A

c. 8.55 ft

53
Q

Item 52.
The transmission drive of a rice mill uses a standard 20 feet-long flat belt. The power source has 6 inches pulley diameter. The pulley diameter of the line shaft is 16 inches.
—————
What is the arc of contact of the small pulley in Item 52 above?

a. 177 degree
b. 210 degree
c. 221 degree
d. None of the above

A

a. 177 degree

54
Q

Item 52.
The transmission drive of a rice mill uses a standard 20 feet-long flat belt. The power source has 6 inches pulley diameter. The pulley diameter of the line shaft is 16 inches.
——————
What is the arc of contact of the larger pulley in Item 52?

a. 186 deg
b. 150 deg
c. 139 deg
d. None of the above

A

a. 186 deg

55
Q

A flat belt with 5 kW/mm hp rating will be used to transmit 10 hp. What is the width of the belt needed for the drive Assume a 2.0 service factor and a 0.79 arc correction factor.

a. 3.78 mm
b. 2.98 mm
c. 2.68 mm
d. None of the above

A

a. 3.78 mm

56
Q

A soil pulverizer with 4-inches pulley diameter runs at 3,000 rpm shaft speed. A 10-hp diesel engine will be used to operate the pulverizer at 1740 rpm speed. What will be the size of the pulley for the engine? (Problem 21)

a. 7 in.
b. 5 in.
c. 3 in.
d. None of the above

A

a. 7 in.

57
Q

Item 56.
A soil pulverizer with 4-inches pulley diameter runs at 3,000 rpm shaft speed. A 10-hp diesel engine will be used to operate the pulverizer at 1740 rpm speed. What will be the size of the pulley for the engine? (Problem 21)
—————–
If the standard B72 V-belt will be used for the engine in Item above, what would be the approximate center distance of the pulley? (Problem 21)

a. 27 in.
b. 30 in.
c. 35 in.
d. None of the above

A

a. 27 in.

58
Q

Item 56.
A soil pulverizer with 4-inches pulley diameter runs at 3,000 rpm shaft speed. A 10-hp diesel engine will be used to operate the pulverizer at 1740 rpm speed. What will be the size of the pulley for the engine? (Problem 21)
——————–
What is the speed of the B72 V-belt above, in m/s? (problem 21)

a. 10.17 m/s
b. 15.97 m/s
c. 22.56 m/s
d. None of the above

A

b. 15.97 m/s

59
Q

Item 56.
A soil pulverizer with 4-inches pulley diameter runs at 3,000 rpm shaft speed. A 10-hp diesel engine will be used to operate the pulverizer at 1740 rpm speed. What will be the size of the pulley for the engine? (Problem 21)
——————–
Referring to Items above, what is the arc of contact of the small pulley? (Problem 21)

a. 160 deg
b. 169 deg
c. 174 deg
d. None of the above

A

c. 174 deg

60
Q

Item 56.
A soil pulverizer with 4-inches pulley diameter runs at 3,000 rpm shaft speed. A 10-hp diesel engine will be used to operate the pulverizer at 1740 rpm speed. What will be the size of the pulley for the engine? (Problem 21)
——————–
Still referring to Items above, what is the arc of contact of the larger pulley? (Problem 21)

a. 186 deg.
b. 178 deg
c. 172 deg
d. None of the above

A

a. 186 deg.

61
Q

If the center distances of the three pulleys in items above are 24, 36 and 42 inches for 4-to 6-inches, 6- to 8-inches, and 8- to 4-inches pulley diameters, respectively, what is the length of the belt needed? Assume a 135° angle of arc for the 6- and 8-inches pulley diameter while 90° for the 4-inch pulley diameter.

a. 98.45 in.
b. 101.56 in.
c. 110.34 in.
d. None of the above

A

b. 101.56 in.

62
Q

A motor running at 1725 rpm speed is driving a fan with 2100 rpm speed. The motor pulley is 127 mm. What is the speed of the belt that drives the fan (Problem 20)

a. 837.44 m/min
b. 868.24 m/min
c. 886.24 m/min
d. None of the above

A

a. 837.44 m/min

63
Q

Determine the speed of a hammer mill driven by an electric motor at 1740 rpm speed. The motor pulley is 4 inches while the milling machine pulley is 3 inches. Assume that there is no slip on the drive system. (Problem 10)

a. 2023 rpm
b. 2230 rpm
c. 2320 rpm
d. None of the above

A

c. 2320 rpm

64
Q

Item 63.
Determine the speed of a hammer mill driven by an electric motor at 1740 rpm speed. The motor pulley is 4 inches while the milling machine pulley is 3 inches. Assume that there is no slip on the drive system. (Problem 10)
——————-
What is the recommended size of the B-type V-belt needed for the drive in Item 63 above, if its center distance is 60 in.?

a. B169
b. B144
c. B196
d. None of the above

A

b. B144

65
Q

An engine’s flat pulley is used to drive a vertical feed mixer input shaft at 250- rpm speed. The engine pulley diameter is 4 inches and runs at 2000-rpm speed. If the shaft center distance is 8 ft, what is the length of the belt needed for the drive? (Problem 7)

a. 20.65 ft
b. 21.15 ft
c. 22.89 ft
d. None of the above

A

b. 21.15 ft

66
Q

An axial-flow biomass shredder is equipped with a 5inch-diameter double-groove V-belt at its cylinder axle. The engine used to drive the machine is rated at 2400 rpm at an optimum engine throttle opening. If the engine pulley is 4 inches, what is the speed of the shredder axle? (Problem 1)

a. 1209 rpm
b. 1290 rpm
c. 1920 rpm
d. None of the above

A

c. 1920 rpm

67
Q

Item 66.
An axial-flow biomass shredder is equipped with a 5inch-diameter double-groove V-belt at its cylinder axle. The engine used to drive the machine is rated at 2400 rpm at an optimum engine throttle opening. If the engine pulley is 4 inches, what is the speed of the shredder axle
——————–
What is the speed ratio of the engine and the shredder pulleys above? (Problem 1)

a. 1.25
b. 1.50
c. 1.75
d. None of the above

A

a. 1.25

68
Q

Determine the length of a flat belt pulley drive having the following data:
diameter of first pulley, 300 mm;
diameter of second pulley, 400 mm;
and center distance of the pulley shaft, 10 meters (Problem 4)

a. 21.05 m
b. 23.40 m
c. 25.63 m
d. None of the above

A

a. 21.05 m

69
Q

Two pulleys of a tractor-generator drive system are running in opposite direction. The pulleys were measured to have 6-meters center distance from each other. If the tractor pulley is 8 inches and the generator pulley is 6 inches, what would be the total length of the belt in the drive system?

a. 494.63 in.
b. 507.43 in
c. 542.67 in.
d. None of the above

A

a. 494.63 in.

70
Q

The drive shaft of an engine is driving the rice mill line shaft that drives a 24-inches flat pulley in a crossed-drive assembly. The drive shaft pulley has 6- inches diameter. The distance between pulleys measured from the center of the shaft is 20 ft. What would be the length of the flat belt needed for the drive? Add 1 ft from the computed belt length for splicing purposes. (Problem 12)

a. 45 ft
b. 54 ft
c. 65 ft
d. None of the above

A

a. 45 ft

71
Q

*A horizontal mixer is designed to incorporate soil and charcoal for composting laboratory experiment. The motor used series of belt and pulley drives, as follows:
D1 = 4 in.; D2 = 12 in.;
D3 = 2 in.; D4 = 12 in.;
D5 = 2 in.; and D6 = 12 in.
Determine the speed of the shaft in first transmission shaft if the motor runs at 1720 rpm speed. (Problem 13)

a. 423.1 rpm
b. 467.8 rpm
c. 573.3 rpm
d. None of the above

**What is the rpm of the 2nd transmission shaft above (Problem 13)

a. 95.55 rpm
b. 100.34 rpm
c. 105.43 rpm
d. None of the above

***What is the rpm of the 3rd transmission shaft above (Problem 13)

a. 15.9 rpm
b. 20.1 rpm
c. 23.4 rpm
d. None of the above

A

c. 573.3 rpm

a. 95.55 rpm

a. 15.9 rpm

DESIGN OF AGRICULTURAL MACHINERY - A.T. Belonio and D.A.H. Belonio (14 decks)

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