Shree Agrasain College Interview Questions and Answers

Specific gravity varies for different materials. Aluminium - 2.7, Tungsten - 19.3, Mild Steel - 7.85, Stainless Steel - 7.9

• Specific gravity is the ratio of the density of a substance to the density of a reference substance.

• Aluminium has a specific gravity of 2.7, making it a lightweight metal.

• Tungsten has a specific gravity of 19.3, making it a very dense metal.

• Mild steel has a specific gravity of 7.85, making it a relatively heavy metal.

• Stainless steel has a specific gravity...read more

Torque is a measure of the twisting force that causes rotation. Its SI unit is Newton-meter (Nm).

• Torque is the product of force and the perpendicular distance from the axis of rotation to the line of action of the force.

• It is a vector quantity and is measured in Newton-meter (Nm) in the SI system.

• Torque is important in mechanical engineering as it is used to measure the effectiveness of a machine or engine.

• Examples of torque include the force required to turn a bolt with a wr...read more

1st and 3rd angle projection are two methods of representing a 3D object on a 2D plane in engineering drawings.

• 1st angle projection is commonly used in Europe and Asia, while 3rd angle projection is commonly used in North America.

• In 1st angle projection, the object is imagined to be in between the viewer and the plane of projection, while in 3rd angle projection, the object is imagined to be behind the plane of projection.

• The symbol for 1st angle projection is a square with a...read more

Force is a physical quantity that changes the state of motion of an object. Its SI unit is Newton (N).

• Force is a push or pull that can change the motion of an object.

• It is a vector quantity, meaning it has both magnitude and direction.

• The SI unit of force is Newton (N), named after Sir Isaac Newton.

• 1 N is defined as the force required to accelerate a mass of 1 kg at a rate of 1 m/s^2.

• Other common units of force include pound-force (lbf) and kilogram-force (kgf).

The direction of gears depends on the type of gear and its application.

• Spur gears rotate in opposite directions when meshed together.

• Helical gears rotate in the same direction when meshed together.

• Bevel gears change the direction of rotation by 90 degrees.

• Worm gears can rotate in either direction depending on the orientation of the worm and gear.

• The direction of rotation can also be reversed by adding an idler gear.

A nut is a fastener with a threaded hole, while a bolt is a threaded fastener with a head.

• A nut is usually smaller than a bolt.

• A bolt is inserted through a hole and tightened with a nut.

• Bolts can have different types of heads, such as hexagonal or round.

• Nuts can have different shapes, such as hexagonal or square.

• Bolts are used to hold two or more objects together, while nuts are used to secure the bolt in place.

• Examples of bolts include carriage bolts, lag bolts, and machine ...read more