Determine the minimum required coolant mass flow rate to avoid boiling using 50/50 Glycol properties

Understand the function of pressure cap. What does a pressure cap do in an automotive cooling system?

What is the construction of a pressure cap?

How does it perform its function? What are the possible failure modes? How likely are these failure modes? Are you familiar with FMEA's?

Choose a heat exchanger configuration - Parallel vs Counter flow

Think about fluid allocation. Which side the coolant should go and why?

Air at 30 C flows at 10 m/s across an in-line tube bank consist of 5 rows with 10 tubes per row. The diameter of the tube is 5 cm and the tube pitch is 13 cm. Water flowing in tube maintains the tube surface temperature at 80C find the following:

a) the air temperature at the outlet of the tube

b) the convective heat transfere per unit length per tube to the air

( it is heat transfer problem )

Consider a vertical slider on a rod where the potential energy of the slider at height, h, is used. Derive the impact factor. Assume the slider has a mass, m, the system has a dissipation factor, ?, and the static and impact deflections are given as, ?_i and ?_st .

A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa and 50 °C and pumped by a pump operating at 10 kJ/kg. The water leaves the pump at 4 MPa.

1. Draw the complete cycle with all numeric values of the problem depicted on the drawing. [10 points]

2. Calculate the Carnot efficiency of the cycle. [10 points]

3. Calculate the specific heat loss (kJ/kg) in the pipeline between the boiler and the turbine. Define input/output. [10 points]

4. Calculate the turbine work in MW. Define input/output. [10 points]

5. Calculate the specific heat transfer (kJ/kg) in the condenser. Define input/output. [10 points]

6. Determine the specific heat transfer (kJ/kg) in the boiler. Define input/output. [10 points]

7. Determine thermal efficiency of the cycle. [10 points]

8. Determine the isentropic efficiency of the turbine. [10 points]

9. Calculate the specific entropy (kJ/kg-K) of the cycle and explain whether this is a feasible process. [10 points]

10. Calculate the total specific entropy change (kJ/kg-K) of the system and explain whether this is a feasible process. [10 points]

How can I create a graph of these differential equations in Mathcad?

Steam undergoes an isentropic compression in an insulated piston–cylinder assembly from an initial state where T₁ = 120°C, p₁ = 1 bar to a final state where the pressure p₂ = 30 bar.


Determine the final temperature, in °C, and the work, in kJ per kg of steam.

A set of ceramic parts are tested and the stress required for failure is measured; the results are as follows: 152 MPa, 260 MPa, 500 MPa, 1150 MPa, 700 MPa, 640 MPa, 370 MPa, 1020 MPa, and 1590 MPa. Calculate the Weibull modulus for the material. Discuss whether the material would be a good choice if we wished to design a reasonably reliable part.

According to Breguet range equations, what are techniques to increase range and endurance?

Steam at 4800 lbf/ in.², 1000°F enters the first stage of a supercritical reheat cycle including two turbine stages. The steam exiting the first-stage turbine at 600 lbf /in.² is reheated at constant pressure to 1000°F. Each turbine stage and the pump has an isentropic efficiency of 91%. The condenser pressure is 1 lbf/ in.² If the net power output of the cycle is 100 MW, determine

(a) the rate of heat transfer to the working fluid passing through the steam generator, in MW.
(b) the rate of heat transfer from the working fluid passing through the condenser, in MW.
(c) the cycle thermal efficiency.

QUESTION 1

Which components form the interface between the electronic signal processor (data processing) and the actual process (mechanical motion)?

QUESTION 2

Design selection of appropriate actuator is determined by operating conditions which can be:

QUESTION 4

Which of the following motors are inexpensive and used in the door locks, window lifts, antenna retractor, anti-lock braking systems and cordless hand drill?

QUESTION 4

Which of the following motors are inexpensive and used in the door locks, window lifts, antenna retractor, anti-lock braking systems and cordless hand drill?

QUESTION 5

Which of the following motors are used when you need a precise speed control such as the one in the laser printers and photocopiers?

QUESTION 6

Torque is proportional to the:

QUESTION 7

Stepper motor with 100 steps has which resolution?

QUESTION 8

Pulse with modulation is achieved with the:

QUESTION 9

Stepper motors can be used in the following industrial applications:

QUESTION 10

If you have 10 V pulse with modulation signal provided to step motor, what is the duty cycle you need to have to achieve power of 2 V?

5. Commonly used elements for wire strain gauges are __________

a) nickel and copper

b) nickel and gold

c) gold and brass

d) silver and aluminum

6. Proper functioning of a strain gauge depends on __________

a) strain

b) stress

c) bonding

d) length of wire

7. Semiconductor gauges are more sensitive than metal gauges---------

(a)True

(b) False

8. A capacitive transducer works on the principle of ________

a) inductance

b) capacitance

c) resistance

d) reluctance

9. Capacitance can be varied in ________

a) 10 ways

b) 6 ways

c) 2 ways

d) 4 ways

10. Capacitive transducer displays ________

a) linear behaviour

b) non-linear behaviour

c) exponential behaviour

d) tangential behaviour

11. Frequency response of capacitive transducers is ________

a) high

b) medium

c) low

d) zero

12. What does a piezoelectric material generate in response to an applied forece?

a) Electricity

b) Sound

c) Movement

d) Heat

13. Piezoelectric materials are -----

a) Metals

b) polymers

c) ceramics

d) Composites

14. The vibration frequency of quartz

a) 1kHz

b) 10 kHz

c) 20 KHz

d) 30 KHz

15.The purpose of diaphragm of piezoelectric pressure sensors is --------------

a) To convert pressure to electricity

b) To protect the crystal

c) To protect vacuum space

d) To protect piezoelectric layers

16. An applied voltage will cause a piezoelectric crystals to .......

a) Change direction

b) Change chemical structure

c) Change shape

d) Change color

17. Which type of accelerometer is most widely used for measuring vibration and shock?

a) Capacitive

b) MEMS

c) Piezoelectric

d) Piezoresistive

18. MEMS-based accelerometers are typically:

a) Capacitive

b) Inductive

c) Microphone

d) Piezoelectric

e) Piezoresistive

f) Piezoinductive

A cylindrical tube of mean radius 1” and wall thickness 0.1” is subjected to an internal pressure p = 300 psi and a torque T = 2000 lb-in. The ends of the tube are closed. Find the safety factor against yielding if the material yields in uniaxial tension at SY = 8 ksi and Von Mises theory is used.

An isentropic pump compresses water between the pressures listed in Problem 1 (30 & 8000 kPa) at the same mass flow rate (3 kg/s). Assuming saturated liquid conditions at the inlet of the pump, determine:

a) The power required to operate the pump

b) The ratio of the turbine power output from problem 1 to the required power input of the pump