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Irrigation Engineering
Irrigation Engineering Interview
Quiz 1
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Q.1
Which method involves the use of crop factor?
a) Penman’s equation
b) Hargreaves method
c) Blaney-Criddle Formula
d) Tanks and Lysimeter
Q.2
What are the dimensions of the standard class-A pan?
a) Diameter-1.2 m, Depth – 25 cm
b) Diameter-2 m, Depth – 25 cm
c) Diameter-2 m, Depth – 30 cm
d) Diameter-1.2 m, Depth – 30 cm
Q.3
Penman’s equation for the estimation of PET has been derived by using ___________
a) energy balance approach
b) mass transfer approach
c) combination of energy balance approach and mass transfer approach
d) combination of energy balance approach and energy transfer approach
Q.4
Albedo or reflection coefficient factor is used in which method?
a) Blaney- Criddle equation
b) Christiansen equation
c) Penman equation
d) Tank and Lysimeter method
Q.5
Penman’s equation can also be used to compute evaporation from a water surface like a lake if _________
a) reflection coefficient = 0.05
b) reflection coefficient > 0.05
c) reflection coefficient < 0.05
d) reflection coefficient = 0.45- 0.90
Q.6
The pan evaporation can also be determined by Christiansen formula.
a) True
b) False
Q.7
What is the consumptive use for a crop in the month of April having a consumptive use coefficient equal to 0.and pan evaporation iscm?
a) 28 cm
b) 43.75 cm
c) 35.80 cm
d) 40.80 cm
Q.8
Compute the total consumptive use for a drainage basin by Penman’s formula. The slope of saturation vapour pressure V/s chart at 40°C is 2.mm of Hg/°C and the net incoming solar radiation is 5.mm of evaporative water/day. Assume, Ea = 18.mm/day and Psychrometric constant = 0.mm of Hg/°C.
a) 17.01 mm/day
b) 18 mm/day
c) 11.07 mm/day
d) 20.45 mm/day
Q.9
What is the correct expression of parameter Ea in Penman’s equation?
a) Ea = 0.35 (1 + V2/160) (es – ea)
b) Ea = 0.35 (1 + V2/160) (es + ea)
c) Ea = 0.35 (1 – V2/160) (es – ea)
d) Ea = 0.35 (1 – V2/160) (es + ea)
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