1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alex_Xolod [135]
3 years ago
14

3. Which of the following statements is false?

Engineering
1 answer:
MrRa [10]3 years ago
7 0

Answer: c.An accumulator is not used in a system with a receiver/dryer

Explanation:

In a refrigeration system, a condenser is used to transfer heat and this occurs from the refrigerant to the air or water.

Then, the refrigerant then condenses to liquid when the hear has been transferred.

We should note that the condenser is normally mounted in front of the radiator. The receiver/dryer is a storage tank for the liquid refrigerant from the condenser.

The statement that an accumulator is not used in a system with a receiver/dryer is not true. This is because, the accumulator gives protection to the compressor which helps to prevent the failure of the compressor.

Therefore, the answer is C.

You might be interested in
Air initially at 15 psla and 60 F is compressed to 75 psia and 400 F. The power input to air under steady state condition is 5 h
Triss [41]

Answer:\dot{m}=3.46lbm/min

Explanation:

Initial conditions

P_1=15 psia

T_1=60 F^{\circ}

Final conditions

P_2=75 psia

T_2=400F^{\circ}

Steady flow energy equation

\dot{m}\left [ h_1+\frac{v_1^2}{2}+gz_1\right ]+\dot{Q}=\dot{m}\left [ h_2+[tex]\frac{v_2^2}{2}+gz_2\right ]+\dot{W}

\dot{m}\left [ c_pT_1+\frac{0^2}{2}+g0\right ]+\dot{Q}=\dot{m}\left [ c_pT_2+\frac{0^2}{2}+g0\right ]+\dot{W}

\dot{m}c_p\left [ T_1-T_2\right ]+\left [ -5hp\right ]=\dot{W} -5\times 746\times 3.4121

-4\dot{m}-\dot{m}\times 0.24\times \left [ 400-60\right ]

-81.6\dot{m}-4\dot{m}=-4.949 BTU/sec

\dot{m}=0.057821lbm/sec

\dot{m}=3.46lbm/min

3 0
3 years ago
If the gear ratio is 3:5 does it increase torque or speed?
Bas_tet [7]

Answer:

yes it does

Explanation:

3 0
3 years ago
Read 2 more answers
Explain difference(s) between strength, hardness and toughness.
harkovskaia [24]

Explanation:

Step1

Strength is the maximum stress induces in the material under applied load condition. More the strength more will be ability to sustain load. Strength can be measured from tensile test. It has same unit as stress. Generally ductile material has more strength as compare to brittle material.

Step2

Hardness is the resistance to scratch on the material under given load condition. More the hardness more will be the resistance towards scratching of material. Hardness can be measured by Rockwell or Birnell hardness test. This property of metal is opposite to the strength.

Step3

Toughness is the ability to absorb energy under given loading condition up to its fracture point. It is a type of strain energy that is stored in the metal. Generally ductile metal has more toughness as compare to brittle.

4 0
4 years ago
Consider a single crystal of some hypothetical metal that has the BCC crystal structure and is oriented such that a tensile stre
velikii [3]

Complete Question

Consider a single crystal of some hypothetical metal that has the BCC crystal structure and is oriented such that a tensile stress is applied along a [121] direction. If slip occurs on a (101) plane and in a [111]  direction, compute the stress at which the crystal yields if its critical resolved shear stress is 2.9 MPa.  

Answer:

The  stress is \sigma  =  10. 655 MPa

Explanation:

From the question we are told that

  The critical yield resolved shear stress is  \sigma  = 2.9Mpa

First we obtain the angle  \lambda between the slip direction [121] and  [111]

             \lambda = cos^{-1} [\frac{(u_1 u_2 + v_1 v_2 + w_1 w_2}{\sqrt{u_1^2 + v_1 ^2+ w_1^2})\sqrt{( u_2^2 + v_2^2 + w_2 ^2)} }  ]

Where u_1 ,u_2 ,v_1 , v_2 , w_1 , w_2 are the directional indices

             \lambda  =  cos ^-[ \frac{(1) (-1) + (2) (1) + (1) (1)}{\sqrt{((1)^2 +(2)^2 + (1)^2)}\sqrt{((-1)^2 + (1)^2 + (1)^2 ) }  } ]

                = cos^{-1} [\frac{2}{\sqrt{6} \sqrt{3}  } ]

                 = 61.87^0

Next is to obtain the angle \O between the direction [121] and [101]

              \O = cos^{-1} [\frac{(u_1 u_3 + v_1 v_3 + w_1 w_3}{\sqrt{u_1^2 + v_1 ^2+ w_1^2})\sqrt{( u_3^2 + v_3^2 + w_3 ^2)} }  ]

 Substituting 1 for u_1 , 2 for  v_1 , 1 for w_1 , 1 for  u_2, 0 for  v_2, and 1 for  w_2

            \O = cos^{-1} [\frac{1* 1 + 2*0 + 1*1 }{\sqrt{1^2 + 2^2 + 1^2 } \sqrt{(1^2 + 0^2 + 1^2 )}  } ]

               \O = cos^{-1} [\frac{2}{\sqrt{6} \sqrt{2}  } ]

                   = 54.74 ^o

   The stress is mathematically represented as

              \sigma = \frac{\tau_c}{cos \O cos \lambda }

                  = \frac{2.9}{cos 54.74^o cos 61.87^o}

                  =  \frac{2.9}{0.2722}

             \sigma  =  10. 655 MPa

           

       

5 0
3 years ago
Please help! timed test. This about electrical control. Please be serious.
Lapatulllka [165]
The answer is memory i believe
3 0
3 years ago
Other questions:
  • A 0.2‐kg particle P is constrained to move along the vertical‐plane circular slot of radius r = 0.5 m and is confined to the slo
    5·1 answer
  • To use Allowable Stress Design to calculate required dimensions using a specified factor of safety. A structural element that ca
    7·1 answer
  • Determine the carburizing time necessary to achieve a carbon concentration of 0.30 wt% at a position 4 mm into an iron–carbon al
    11·1 answer
  • What is ONE DIFFERENCE between civil structural engineering
    13·1 answer
  • * Write a recursive function that finds the index of s2 in s1. Do not use any * string functions except for .length(), .equals()
    12·1 answer
  • Which of the following best describes the role of engineers
    12·1 answer
  • Which timeline shows the correct order of contributions made to the discovery of DNA?
    6·2 answers
  • Determine linear atomic density along [001] direction of a FCC unit cell with lattice constant a (cube edge length).
    7·1 answer
  • What should you do before you start welding?
    9·1 answer
  • A set of drawings for a building usually includes plan views of the site (lot), the floor layout, and the ____.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!