Get Ahead with Our Exam Q&A

Explore our extensive collection of questions and answers to enhance your learning experience and prepare for exams effectively

When the frictional force between the belt and the pulley starts reducing, then relative motion between belt and pulley occurs, This phenomenon is called slip. Slip is expressed in (%) percentage.

In power transmission of belts, pulleys can be classified into two types

fast pulley – pulley mounted and keyed to the shaft
Idler pulley or loose pulley – Pulley mounted on shaft free to rotate on shaft.

i. The diameter of the loose pulley is slightly less than that of the fast pulley so that when the belt is shifted on to the loose pulley, its tension is reduced.

ii. Loose pulley takes care of the idling time of the machine and does not transmit any power.

Dwell period is the period during which cam does not move from its position.

Dwell period may be followed by after the rising or return stroke of a cam.

Features of a RAM device

i. A RAM device makes it possible to access data in random order, which makes it very fast to find a specific piece of information.

ii.RAM has only volatile memory, hence the stored information is lost when there is no power.

iii. A RAM does not store any information permanently.

In AutoCAD, UCS refers to User coordinate system, the user coordinate system (UCS) establishes the location and orientation of a movable Cartesian coordinate system. UCS is an essential tool for many precision operations.

In AutoCAD,2D drawing PAN command is used to place/move the drawing in any direction.
PAN command can be accessed by simultaneously pressing the mouse left button and dragging the mouse.
Press ?P? followed by ?Enter? to activate the Pan tool, then click and drag your mouse to move the view of your drawing.
This shortcut is particularly helpful when working on large, complex drawings.

Functional keys and their features used in AutoCAD are:

F1 – Help window.
F2 -opens a pop-up screen showing the command line.
F3- Object snap feature ON /OFF.
F4- Object snap feature ON /OFF ( 3D).
F5-ISOPLANE ON/OFF.
F6 -Dynamic UCS on or off.
F7-Display grids ON/OFF.
F8-ORTHO mode ON/OFF.
F9-Snap grid ON/OFF.

In AutoCAD, mouse control features are given below

For Extending Zoom – Double click the mouse wheel

For PAN – Hold the wheel down and move the mouse

For 3D rotate – Hold Shift Wheel (in that order) and to orbit (for 3D drawings)

For vertical or horizontal shift – Hold Wheel Shift (in that order) and to pan vertically or horizontally

For zoom in and out – Roll the wheel forward and backwards

OOPS restores objects erased by the last ERASE command.

Theoretically, an impulse turbine can have a 100% efficiency if the speed of the incoming water jet is two times the speed of the bucket.
In this case, water will attain a zero velocity with respect to earth (stationary reference frame) and transfer all its energy to the turbine.

Get Expert Advice for Free: Register for Your Free Consultation Now!

Full Name

Phone Number

Select Language

Select Course

[honeypot honeypot-100]