Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Mechanical Engineering Expert

problem 1: In an engine working on dual cycle the compression ratio is 9. The conditions of air at the beginning of compression are 1 bar, 90o C. Maximum pressure is 6.8 Mpa. Heat supplied is 1700 kJ/kg. Find out:

a) p, V, T at all points.
b) efficiency.
c) MEP.

Qustion 2: In an air standard Otto cycle the condition of air at the beginning is 1 bar, 300 K, compression ratio is 7. The heat supplied is 800 kJ/kg. Determine 

a) p, V, T at all points 
b) efficiency 
c) MEP.

problem 3: The conditions of air at the beginning of compression of a dual cycle are 1 bar, 35o C and 150 litres. The value of the compression is 10 litres and 42 kJ of heat is added at constant volume, 63 kJ of heat is added at constant pressure. Determine

a) air standard efficiency 
b) MEP 
c) clearance percentage
d) cut-off percentage.

problem 4: Derive an expression for the air standard efficiency of diesel cycle and then deduce it for mean effective pressure.

problem 5: With a neat sketch briefly describe the construction and working principle of a solex carburetor.

problem 6: What are the advantages of lubrication.

problem 7: During a brake, on a four cylinder four stroke engine coupled to a hydraulic dynamometer at constant speed the following readings were obtained.  B.P with all cylinders working = 14.7 kW

B.P with cylinder 1 cut off    = 10.14 kW
B.P with cylinder 2 cut off    = 10.3 kW
B.P with cylinder 3 cut off    = 10.36 kW
B.P with cylinder 4 cut off    = 10.21 kW
 
problem 8: A single row impulse turbine develops 132.4 kW at a blade speed of 175 m/s using 2 kg of steam per sec. Steam leaves the nozzle at 400 m/s. Velocity coefficient of the blade is 0.9. Steam leaves the turbine blades axially. Assuming no shock determine the nozzle angle, blade angles at the entry and exit.

problem 9: In a steam nozzle, the steam expands from 4 bar to 1 bar. The initial velocity is 60 m/s and initial temperature is 200o C. Determine the exit velocity if the nozzle efficiency is 92% and the dryness fraction at exit.

problem 10: Derive an expression for critical pressure ratio in a steam nozzle.

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M93731

Have any Question? 


Related Questions in Mechanical Engineering

As an approximate rule a particular vibrational mode in a

As an approximate rule, a particular vibrational mode in a molecule will contribute to the equipartition principle energy at temperatures where 3 2 kBT Ú ve for that mode. In the following table are listed all the vibrat ...

Describing emmsion components operations and how to test

Describing emmsion components operations and how to test their operation. Two paragraph paper Double spaced

Name at least four factors which can reduce in-service

Name at least four factors which can reduce in-service clamping force? Name at least three factors which can be prevented or at least reduced by sufficient in-service clamping force? Name at least four factors which dete ...

1 find the change in temperature between stations 1 and 2

1. Find the change in temperature between stations (1) and (2) in terms of the quantities A 1 , A 3 , v 1 , v 3 , c v , and θ. The internal energy is given by c v T. The fluid is water and T 1  =T 3 , P 1  = P 3 . 2. A l ...

Please reference any source of outside information as

Please reference any source of outside information as needed to answer these questions. 1. In a frozen food plant, atmospheric air is to go through a pre-cooler to be partially dehydrated so that during its passage throu ...

The figure illustrates the operation of an air lift pump

The figure illustrates the operation of an air lift pump. Compressed air is forced into a perforated chamber to mix with the water so that the specific gravity of the air-water mixture above the air inlet is 0.5. Neglect ...

In the actual combustion of benzene in an engine the af

In the actual combustion of benzene in an engine the A/F ratio was 12/1. Calculate the analysis of the wet products of combustion

A sample of he ions is prepared at a temperature of 298 k

A sample of He + ions is prepared at a temperature of 298 K and a density of 2.0 # 10 10 cm -3 . Because these are ions, magnetic ields may be used to trap those ions with kinetic energy less than some threshold value et ...

1 a slender vertical bar ab with pinned ends and length l

1. A slender vertical bar AB with pinned ends and length L is held between immovable supports. What increase ?T in the temperature of the bar will produce buckling? 2. A W2 × 87 structural steel column has a length of 12 ...

Assigned work clearly indicate all assumptions and

Assigned Work (Clearly indicate all assumptions and references) 1. A 500 m 2 light colored swimming pool is located at (a) normal suburban site, (b) well-sheltered site, where the measured wind speed at 10 m height is 3 ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro