Sprayers MCQs : This section focuses on the "Sprayers". These Multiple Choice Questions (MCQs) should be practiced to improve the Sprayers skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
During a discharge measured through a hydraulic spray nozzle was 450*10-6m3/min at nozzle operating pressure of 284 kPa. If the pressure is increased by 10%. The percent increase in discharge will be _______
A. 4.90%
B. 5.10%
C. 3.60%
D. 6.40%
Question 2
Which nozzle covers the entire area at small range?
A. Solid cone nozzle
B. Fan nozzle
C. Hollow cone
D. Nozzle tip
Question 3
Which part of power sprayer is used to prevent corrosion?
A. Agitator
B. Strainer
C. Prime mover
D. Tank
Question 4
Aldrin is the ________
A. inorganic compound
B. oil compound as spray material
C. organic compound as spray material
D. solution
Question 5
What is the Nozzle Flow Rate (NFR)?
A. NFR = application rate + area covered by single nozzle
B. NFR = application rate * area covered by single nozzle
C. NFR = application rate - area covered by single nozzle
D. NFR = \(\frac{application \, rate}{area \, covered \, by \, single \, nozzle} \)
Question 6
The tank capacity of hydro-pneumatic sprayers, is about ________
A. 1135.5 l
B. 2000 l
C. 750 l
D. 1000 l or less
Question 7
Which sprayers are operated usually with Internal Combustion engines?
A. Power sprayer
B. Hydraulic sprayer
C. Commercial sprayer
D. Foot sprayer
Question 8
Who invented duster?
A. H.D. Norman
B. C.E. Ramser
C. Susan Hibbard
D. W.H. Sleeper
Question 9
A field sprayer having a horizontal boom with 20 nozzles spaced 40 cm apart is to be designed for maximum application rate of 650 l/ha at nozzle pressure of kPa and forward speed of km/h. What will be the pump capacity in l/min?
A. 44
B. 46
C. 48
D. 50
Question 10
What is the formula used for calculating VMD, when pressure is less than 675 kPa?
A. \(\frac{(VMD1)}{VMD2}=\Big\{(\frac{P1}{P2})^{\frac{2}{3}} \Big\} \)
B. \(\frac{(VMD1)}{VMD2}=\Big\{(\frac{P2}{P1})^{\frac{2}{3}} \Big\} \)
C. \(\frac{(VMD2)}{VMD1}=\Big\{(\frac{P1}{P2})^{\frac{2}{3}} \Big\} \)
D. \(\frac{(VMD2)}{VMD1}=\Big\{(\frac{P1}{P2})^{\frac{1}{3}} \Big\} \)
Question 11
A sprayer having 0.4 litre per minute nozzle discharge rate and 50 cm width of coverage, is required to apply 0.8 kg of active ingredient per hectare. If one kg of active ingredient is contained in 120 litres of spray solution, determine the speed of the sprayer.
A. 4 km/h
B. 3 km/h
C. 5 km/h
D. 6 km/h
Question 12
The operating pressure of fan nozzle, which is undesirable is _____
A. 1.2 kg/cm2
B. 1.5 kg/cm2
C. 9 kg/cm2
D. 5.9 kg/cm2
Question 13
In which nozzle narrow elliptical spray pattern is formed?
A. Hollow cone nozzle
B. Solid cone nozzle
C. Fan type nozzle
D. Nozzle boss
Question 14
By using a knapsack sprayer, a man can spray over the area of about __________
A. 1 ha per day
B. 0.75 ha per day
C. 1.25 ha per day
D. 0.4 ha per day
Question 15
What is the pressure at which Power sprayers are operated?
A. 68-103 kg/cm2
B. 20-55 kg/cm2
C. 106-141 kg/cm2
D. 120-155 kg/cm2
Question 16
What is the rotating speed of an agitator in a power sprayer?
A. 400-500 rev/min
B. 900-1000 rev/min
C. 600-700 rev/min
D. 100-200 rev/min
Question 17
A sprayer having 0.4 L/min nozzle discharge rate and 50 cm width of coverage is required to apply 0.8 kg of active ingredient per hectare. If 1 kg of active ingredient is content in 120 L of spray solution. What will be the speed of travel of sprayer?
A. 2 km/h
B. 5 km/h
C. 3 km/h
D. 4 km/h
Question 18
A hydraulic sprayer fitted with hollow cone nozzle is required to be calibrated for application rate 150 l/ha. The sprayer speed is 6.5/h, nozzle spacing is 50 cm, and the available 0.787 mm orifice diameter nozzle is rated at 0.473 l/min. What will be the nozzle flow rate?
A. 0.0135 l/s
B. 0.0136 l/s
C. 0.0137 l/s
D. 0.0138 l/s
Question 19
A tractor sprayer is fitted with 20 hollow cones nozzles to attain application rate of 200 l/hr. During the calibration test, the nozzle flow rate was found to be 1.25 l/min whereas, the rated nozzle flow rate was found to be 0.473 l/min was available at 275 kPa. If the nozzle produces droplets with volume median diameter 200 μm at 1 Mg Pascal, the droplet at the desire flow rate is?
A. 161 μm
B. 164 μm
C. 167 μm
D. 170 μm
Question 20
A hydraulic sprayer fitted with hollow nozzle is required to be calibrated for application rate 150 L/ha. The sprayer speed is 6.5 km/h. Nozzle spacing is 50 cm. The available 0.787 mm orifice diameter. Nozzle is rated at 0.473 L/min. What is the nozzle flow rate?
A. 49.51 \(\frac{L}{h} \)
B. 54.44 \(\frac{L}{h} \)
C. 48.75 \(\frac{L}{h} \)
D. 24.10 \(\frac{L}{h} \)
Question 21
Which part of power sprayer is used to break the liquid into desired spray and deliver to plants?
A. Boom
B. Nozzle
C. Strainer
D. Pressure gauge
Question 22
What will be the diameter of base of a spray cone in a boom sprayer?
A. D = 2h tan \(\frac{θ}{2} \)
B. D = 2h/tan \(\frac{θ}{2} \)
C. D = 2h + tan \(\frac{θ}{2} \)
D. D = 2h - tan \(\frac{θ}{2} \)
Question 23
An air blast of sprayers is to be operated at 3 km/hour and desired application rate is 18 l/tree. The tree spacing is 9*9 m and nozzle delivers 5 l/min at operating pressure of 4*105 N/m2. How many nozzles would be needed?
A. 10
B. 20
C. 30
D. 40
Question 24
During a test, discharge measured through a hydraulic spray nozzle was 45010-6 m3/min at nozzle operating pressure of 284 kPa. If the pressure is increased by 10%, the percent increase in discharge will be ________
A. 2.82%
B. 3.87%
C. 4.87%
D. 5.87%
Question 25
An air blast of sprayer is to be operated at 3 km/h and application rate is 18 l/tree. The spacing is 9m*9m and each nozzle delivers 5 lit/min and operating process of 4*105 N/m2. If one half row is sprayed from each side of the machine. How many sprayers will be needed?
A. 30
B. 50
C. 20
D. 40
Question 26
Who invented world's first self-propelled sprayer?
A. Ray Hagie
B. Elon Musk
C. John Deere
D. Rachel Carson
Question 27
What is rate of the spinning disc, attached to the motor, in Ultra low volume sprayer?
A. 4000-9000
B. 1000-3000
C. 750-1000
D. 10000-15000