Answer:
The frequency that the sampling system will generate in its output is 70 Hz
Explanation:
Given;
F = 190 Hz
Fs = 120 Hz
Output Frequency = F - nFs
When n = 1
Output Frequency = 190 - 120 = 70 Hz
Therefore, if a system samples a sinusoid of frequency 190 Hz at a rate of 120 Hz and writes the sampled signal to its output without further modification, the frequency that the sampling system will generate in its output is 70 Hz
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.
The true statement about the dot plot is 1 has 4 and 0 dots.
Explanation:
- after creating a Bar chart 4 is the right answer.
- The highest among st all the other plots is 1 but 4 shows 3.
- Taking an average from all the data points 3 comes to the right answer.
- Median the central Mid-point is 3.
- Mode also comes to 3.
- It is skewed on the right due to the 1st one.
- Skewed shows the data point either increasing or in decreasing.
- There a to Bi- histograms which has two ups and downs.
- The true statement has to be as Mean=Median=Mode is 3.
Answer:
a. Rockwell 3. hardness
b. Instron 2. stress vs strain
c. Charpy 1. impact strength
d. Fatigue 4. Endurance Limit
e. Brinell 3. hardness
f. Izod 1. impact strength
Explanation:
Izod and Charpy are the impact strength testing procedure of a material in which a heavy hammer is attached to an arm is released to impact on the test specimen. In Izod test the specimen with v-notch is held vertical with the notch facing outward while in Charpy test the specimen is supported horizontally with notch facing inward to the impacting hammer.
Instron testing system does universal testing of the material which gradually applies the load recording all the stresses and the corresponding strains until the material fails.
Fatigue is the property of a material due to which it fails under the repeated cyclic loading by the initiation and propagation of cracks. The property of a material resist failure subjected to infinite number of repeated cyclic loads below a certain stress limit.
Rockwell and Brinell are the hardness testing methods. In Rockwell test an intender ball is firstly pressed against the specimen using minor load for a certain time and then a major load is pressed against it for a certain time. After the intender is removed the depth of impression on the surface is measured while in case of Brinell hardness we apply only one load against the intender ball for a certain time and after its removal the radius of impression is measured.
Answer:
The power required by pump is 6.18 KW.
Explanation:
The ideal output power of the pump is given by:
Pout = ΔP (Volume Flow Rate)
ΔP = Pf - Pi = 5 MPa - 100 KPa = 5 x 10^6 Pa - 0.1 x 10^6 Pa
ΔP = 4.9 x 10^6 Pa
Volume Flow Rate = (Mass Flow Rate)/(Density of Water)
Volume Flow Rate = (53 kg/min)(1 min / 60s)/(1000 kg/m^3)
Volume Flow Rate = 8.83 x 10^(-4) m^3/s
Therefore,
Pout = [4.9 x 10^6 N/m²][8.83 x 10^(-4) m^3/s]
Pout = 4328.33 Watt = 4.33 KW
Now, the required Power (Pin) is related with isentropic efficiency as:
Isentropic Efficiency = Pout/Pin
Pin = [Pout]/[Isentropic Efficiecy]
Pin = (4328.33 Watt)/(0.7)
<u>Pin = 6183.32 Watt = 6.18 KW</u>