The three load contacts connected between the three-phase power line and the motor close to connect the motor to the line. The normally open auxiliary contact connected in parallel with the two Start buttons closes to maintain the circuit to M coil when the Start button is released.
Coupling is a process through which a tractor and other farm equipment are coupled (joined) together through the use of a pickup hitch and a tongue, while using them to work.
Basically, a coupling assembly connects (joins or couples) a towed equipment such as a trailer having a tongue to a tractor that has a pickup hitch.
Some of the precautions which must be taken before, during and after coupling a tractor to a towed equipment:
- You should check your path for any hazard before you begin coupling.
- You should check the normal air pressure for the braking system of the towed equipment.
- You should use a<u> low gear</u> when rolling up the landing gear after coupling the two equipment. This is to ensure that the rate at which the landing gear is moving isn't too fast considering the weight of the trailer.
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Answer:
1. Slope = 53.3 x 10⁻⁶
2. Deflection = -0.00016m
Explanation:
given:
let L = 4 m (span of cantilever beam)
let w = 300 N/m (distributed load)
let EI =60 MNm² (flexural stiffness)
dy w * L³ 300 x 4³
1. slope = ------- = --------- = ------------------- = 53.3 x 10⁻⁶
dx 6EI 6 x 60x10⁶
wL⁴ 300 x 4⁴
2. Deflection = y = - ----------- = - ------------------ = -0.00016m
8EI 8 x 60x10⁶
therefore the deflection is 0.16mm downwards.
A hydraulic jump is formed between a sluice gate (upstream) and a weir (downstream) explain, with an appropriate plot, what happens if the gate opening is reduced.
"(Begin by drawing generic E-y and M-y curves beside each other).
Because this is a hydraulic jump situation, we know that the flow regime of the water through the sluice gate is super-critical. Before the opening is reduced, we have E1 (as shown on the diagram) occurring after the sluice gate, corresponding to the momentum of M1, which is conserved through the jump. The change in depths before and after the jump can be determined by finding y values at M1 from the momentum curve.
When the gate opening is reduced, the depth of flow out of the opening is also reduced. Referring back to our Energy curve, we now have E2 occurring at a shallower depth and thus a greater specific energy than E1. The corresponding momentum M2 is also greater than M1. The y values that occur at M2 can now be used to determine the new change in depths before and after the jump. As you can see, decreasing the gate opening will cause the overall change in depth through the jump will to be greater, meaning that more energy will be lost. "
Answer: 12.4 feet
Explanation:
If there is a smooth transition and there is no change in slopes, energy considerations can be used
The cube has a kinetic energy of
ke = mv^2/2 = 10 lbm * 20^2ft^2/s^2 / 2 = 2000 lbm-ft^2 / s^2
At the highest point when there is a gain in potential energy
pe = mgh = 10 lbm * 32.2 ft/s^2 * h ft = 322 lbm ft^2/s^2
If there is no loss in energies,
pe = ke
322h lbm ft^2/s^2 = 2000 lbm ft^2/s^2
h = 2000 /322 = 6.211 (ft)
= h / sin(30) = 12.4 ft