Which option identifies the next step Kristin should take to test the design in the following scenario?

SRSS is a method used in responce spectram analysis

VMariaS [17]

Answer:

Modal analysis is performed to identify the modes, and the response in that mode can be picked from the response spectrum. These peak responses are then combined to estimate a total response. A typical combination method is the square root of the sum of the squares (SRSS) if the modal frequencies are not close.

5 0

3 years ago

What is a combination circuit? A combination circuit:

Anon25 [30]

Answer:

Combination circuit; The basic strategy for the analysis of combination circuits involves using the meaning of equivalent resistance for parallel branches to transform the combination circuit into a series circuit.

Example:

The use of both series and parallel connections within the same circuit. In this case, light bulbs A and B are connected by parallel connections and light bulbs C and D are connected by series connections. This is an example of a combination circuit.

7 0

3 years ago

Steel grade AISI 1045 contains 4.5% carbon. a)-True b)- False

yarga [219]

Answer:

False

Explanation:

According to the AISI (SAE) statements the last two numbers of the designation indicates the porcentage of carbon in the steel. And the firs numbers indicate the most important alloy alements.

In the case of the AISI 1045 indicates that the composition of this steel is 0,45% of carbon.

4 0

3 years ago

5. One of the major road blocks for direct DC power in residences is the ___. A) generation of DC B) lack of standardization C)

Montano1993 [528]

Answer:

D) quantity of components required for this type of system

Explanation:

Electricity can be transmitted using the alternating and direct currents. The alternating current is one in which the flow of the current diverts at certain time intervals whereas, the direct current is one in which there is a constant one-directional flow of current. The DC is used in batteries and solar panels. Residential areas and business places make use of the AC current.

One of the several reasons why the DC is not used in homes is because unlike the AC it is not easy to build and sustain. Moreso, it has more components compared to the AC. For example, its motor consists of brushes and commutators . The components, example, switches are also large compared to the AC components.

6 0

4 years ago

A 25 kVA transformer has an iron loss of 200 W and a full-load copper loss of 350 W. Calculate the transformer efficiency for th

Oksanka [162]

Answer:

a. 97.32 percent

b. 97.92 percent

c. 95.91 percent

Explanation:

given parameters

apparent power, S = 25 kVA

Iron Loss, Piron = 200 W

copper Loss at full load, P cufl = 350 W

let the transformer efficiency at full load be E

let the real power be P out

a.

at full load and 0.8 power factor

P out = Scos∅

= 25 x 10³ x 0.8

=20000 W or 20 kW

efficiency at full load is

E = (P out)/(P out + P iron + P cufl) x 100%

= (20000)/(20000 + 200 + 350) x 100%

= 97.32%

b.

at 70% of full load at unity power factor of 1

Pout = 70% x Scos∅

= 0.7 x 25 x 10³ x 1

= 17,500W or 17.5kW

copper loss at 70% full load

P cu0.7fl = (70%)² x 350

= (0.7)² x 350

= 171.5 W

Iron loss remain the same, P iron = 200 W

Efficiency of transformer at 70% of full load

E = (P out0.7)/(P out0.7 + P iron + P cufl0.7) x 100%

= (17500)/(17500 + 200 + 171.5) x 100%

= 97.92%

c.

at 40% of full load at a power factor of 0.6

P out = 40% x Scos∅

= 0.4 x 25 x 10³ x 0.6

= 6000 W or 6 kW

copper loss at 40% full load

P cu0.7fl = (40%)² x 350

= (0.4)² x 350

= 56 W

Iron loss remain the same, P iron = 200 W

Efficiency of transformer at 40% of full load

E = (P out0.4)/(P out0.4 + P iron + P cu0.4) x 100%

= (6000)/(6000 + 200 + 350) x 100%

= 95.91%

6 0

3 years ago