Answer:
for 5.6V 9 turns, for 12.0V 19 turns, for 480V 755 turns
Explanation:
Vp/Vs= Np/Ns
Vp: Primary voltage
Vs: Secondary Voltage
Np: number of turns on primary side
Ns: number of turns on secondary side
for output 5.6V
140/5.6= 220/Ns
Ns= 8.8 or 9 Turns
for output 12.0V
140/12= 220/Ns
Ns= 18.9 or 19 turns
for output 480V
140/480= 220/Ns
Ns= 754.3 or 755 turns
Answer:
There are six conditions
1. Poles should contain some residual flux.
2. Field and armature winding must be correctly connected so that initial mmm adds residual flux.
3. Resistance of field winding must be less than critical resistance.
4. Speed of prime mover of generator must be above critical speed.
5. Generator must be on load.
6. Brushes must have proper contact with commutators.
Explanation:
Answer:
B. operator error or misuse
Explanation:
A product is a failure if it is not able to achieve the anticipated life cycle as expected by the organization.
In such a case, there is a withdrawal of the product from the market as a result of its ultimate failure of a product to achieve profitability.
Four common causes of product failure are poor design, poor construction, poorly communicated operating instructions, and <u>operator error or misuse</u>
Answer:
the flow is turbulent
Explanation:
The Reynolds number is given by
Re=ρVD/μ
where
V=fluid speed=0.48ft/s=0.146m/s
D=diameter=2.067in=0.0525m
ρ=density=0.805g/cm^3=805Kg/m^3
μ=0.43Cp=4.3x10^-4Pas
Re=(805)(0.146)(0.0525)/4.3x10^-4=14349.59
Re>2100 the flow is turbulent
Note: if you do not want to use a calculator you can use the graphs to calculate the Reynolds number according to their properties
