Answered Questions

  • Impact Analysis

    What is Impact analysis? As a tester how will you do impact analysis in your project?

    Shammi

    • Nov 12th, 2015

    Analyzing the impact of the changes in the deployed application or product. Regression testing need carefully.

    abc

    • Feb 2nd, 2015

    Impact analysis is basically analyzing the impact of the changes in the deployed application or product. It tells us about the parts of the system that may be unintentionally got affected because o...

  • Tractor Wheels

    Why is the rear wheel of tractor larger than its front wheel?

    Srinivas pilla

    • May 20th, 2014

    You know tractor takes less space in turnings than other vehicles like buses lorries that's why it has large space at the rare it provides best turning and more secure my advice please watch a tractor while it takes turn try. u know

  • Torsion- Shafts

    Why do we use solid shafts for transfer of power in case of pumps/ turbines & other machines why we use a hollow shaft (pipe) in universal joints of automobiles; although the rated load and twist is approx. the same.

    Arun Govind Neelan

    • Feb 27th, 2012

    In automobile application we have to consider weight in addition to torque and strength. Hollow shaft has high torque transmitting capacity per unit mass compared to solid shaft. If you consider bending stress diagram for hollow it is min at centre so material requirement is minimum at centre.

  • Suppose there is a weighing balance.In one hand of weighing balance there is weight of 1 KG which is perfectly balancing flask full of water which is on the other hand. Now if i immerse finger in water, will the equillibrium be disturbed?

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    Stercus  

    • Member Since Dec-2007 | Aug 18th, 2009


    Akash, your FBD won’t work if you leave off external contacts – they need to be converted to force arrows. The buoyed object provides one such force: the buoyant reaction force.

    You seem to agree that there is a force acting upwards on the test tube, appearing on the spring balance acting against the weight. As the test tube and the bowl of water are stationary, not accelerating, there must be an equivalent reaction force acting downwards on the body of water, imparted by the object. To go into more detail, the surface of the object experiences a pressure distribution from the water, gradated downwards due to increasing pressure within the water body. The net result from the pressure distribution is that the water pushes up on the object (buoyant force). To avoid being crushed, the object pushes back against this pressure in all directions – so again you get net a reaction force in the opposite direction, downwards.

    So the FBD of the water body needs a reaction force to account for buoyancy. This reaction force acts downwards, from the centre of the displaced volume and is equal to the weight of the water displaced. The weight of the object immersed doesn’t need to be considered as this is supported but the weight of the displaced volume of water does.

    PRASHANT

    • Oct 16th, 2011

    It will not change the reading..... Lets take a simple case... A water flask is putted on a weight balance and a rod is immersed in it which is tied to ceiling with help of a rope. The tension in the...

  • What is a stroke? What is the unit of stroke?

    victor

    • Nov 1st, 2017

    A stroke refers to the full travel of the piston along the cylinder, in either direction.

    Ankit Sharma

    • Dec 26th, 2015

    Stroke=the drift or displacement or a blow of a substance under gentle pressure. In case of IC engine, the piston inside the combustion cylinder displaces no. of times depending upon the gas cycles. ...

  • what is the main advantage of increasing of c.c. in 4stroke engine?

    suresh

    • Dec 19th, 2015

    Advantages of increasing the CC is that the power of the engine can be easily increased, Meaning more volume of air fuel mixture is equal to more power. The other way to increase the power even withou...

    Muhammad fassil

    • Nov 14th, 2015

    Higher CC engine consumes high fuel but is smooth in operations and engine last for more years. Whereas small CC engine can also produce power of higher CC even higher than that. Smaller engine works...