Essential Quantitative Concepts - A simple test
1 A rectangle with sides 50 metres by 30 metres
A What
is the area
in
square metres? ……m2
B What
is the perimeter
length in metres?……m
2 How
many millilitres in a half litre? ..….ml
3 How
many sides has a cube got? ………….
4 Convert
900 millilitres to litres. ………….litres
5 How many millilitres of
imazapyr do you have to add to a 16 litre knapsack to make up a five
percent (5 %)mix? ………….ml
6 You pour 300 ml of
Roundup into a 20 litre knapsack. What is the concentration expressed as a percentage? ………….%
7 Walking
at a speed of 1 metre per second, how fast are you walking in
kilometres per hour? ………….km/hr
8 Roundup can be applied at 3 litres per hectare. How much
Roundup is applied per m2
? …………..ml/m2
9 picloram 240 g/litre herbicide is
used in a 1: 1 (Ratio of one to one) mix with water. Express this rate as a percentage. …………..%
10 A
spray-operator covers a distance of 30 m in 36 seconds. What is the
speed in km/hr? .......….. km/hr
11 A
spray-tip operates at 250 kPa (Kilopascals). Convert this pressure to
bar. ...…….. bar
12 A
spray-tip delivers 0.9 litres/min.
A What
is the flow rate in ml per second? ……….ml/ sec
B How
long would it take to empty a 16 litre knapsack? Only one is
correct!!
15.0
minutes ……………
17.8
minutes ……………
16.7
minutes ……………
13 A
supervisor counts the number of knapsacks sprayed by each operator
per day and records the following information:
Operator Knapsacks
sprayed per day
No
1 9
No
2 7
No
3 10
No
4 6
No
5 7
No
6 9
No
7 7
No
8 10
No
9 7
The
contractor wants to know the average number of knapsacks sprayed per operator per day? ....…………. Average knapsacks /
day
14 A contractor wants to
do a costing on a cut-stump treatment for planning purposes. He
wants to know how much herbicide mix he will use on average per
stump. He cuts and treats 50 gum stumps and finds out that he used
four litres.
What is the average amount of mix per stump? …………..ml/stump
What is the average amount of mix per stump? …………..ml/stump
15 The herbicide imazapyr used for the gum cut-stump treatment costs $40/litre and is used as a
5% mix with water. Using the information from question 14,
how much imazapyr would be used per 1’000 trees and what would it
cost ?
A Amount
of imazapyr / 1’000 stumps ....…………..litres
B Total imazapyr cost / 1’000 stumps ……………..$'s
16 An
operator uses 1 litre of spray-mix on 50 m2. What is the spray volume in l / ha? Answer …………….litres
/ ha
Questions? chemicon@multispray.com
Tel Intl: +27 83 289 0327
Tel Natl: 083 289 0327
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