Driver Selection

Historically, the most popular driver for the centrifugal compressor has been the steam turbine. Steam turbines can readily be speed matched to the compressor. Prior to the upsurge in energy costs, reliability, simplicity, and operational convenience were the primary factors in driver selection. The steam turbine, with its ability to operate over a relatively wide speed range, was ideal for the centrifugal compressor, which could be matched to the process load by speed modulation. 

A driver selected to just handle the power requirements of the design point (other than maximum) is usually a poor approach to economy. Of course, there are applications wiiere the control system takes care of the possibilities of power overload. 

The refrigeration compressor is usually the most expensive equipment of small-scale liquefaction plants. Smaller units may employ screw or reciprocating compressors, whereas centrifugal compressors always are used in larger units. Driver selection is a key decision point in project development, and can be either turbine, gas engine or electric motor. 

Bloch, H.P., Driver Selection, Encylopedia of Chemical Processing and Design, McKetta, J. J., and Cunningham, W.A., eds., Marcel Dekker, New York, NY, 1979. 

Printer prints "garbage" Cable partially unhooked, wrong driver selected, or bad printer control board (PCB) Hook up cable correctly, select correct driver, or replace PCB (respectively). 

If you select the Details tab, you will see a screen similar to the one in Figure 16.7. From here you can configure how Windows communicates with the printer. For example, you can select a different port to print to for this printer. Additionally, you can install a new or updated driver from this screen. Simply click on the New Driver button. Windows will present you with a driver selection screen (similar to the one shown in Figure 16.2 earlier in this chapter). 

P057 Driver Selected For Maximum Specific Gravity DR MAX SG N 13 ... 

Each driver selected for testing must be tested during the selection period. 

The employer must ensure that drivers selected for random tests proceed immediately to the testing site upon notification of being selected. If the driver is performing a safety-sensitive function, other than driving a commercial motor vehicle, at the time of notification, the employer must ensure that the driver ceases to perform the safety-sensitive functions and proceeds to the testing site as soon as possible. 

New driver selection and hiring qualifications (see Driver Recruiting minor tab) ... 

Section 2 Driver Hiring Practices — This section of the survey explored several areas regarding driver selection, qualif3dng, hiring, and training. Review the helow findings and conclusions ... 

Guidance Yes, it is permissible to select alternates. However, it is only permissible if the primary driver selected will not be available fortesting during the selection period because of long-term absence due to layoff, illness, injury, vacation or other circumstances. 

In the Event the Initial Driver Selected Is Not Available For testing, the Employer and/or C/TPA Must Document the Reason Why An Alternate Driver Was tested, the Documentation Must Be Maintained and Readily Available When Requested By the Secretary of Transportation, Any Dot agency, or Any State or Local Officials With Regulatory Authority Over the Employer or Any of Its drivers. 

As a driver selection tool, your road test is critically important. It is essential to your safety program that every new driver you bring on can demonstrate his or her driving skills and abilities. 

Your accident prevention program also needs to address individual drivers who are involved in accidents. Regardless of how thorough your driver selection and screening process or comprehensive your driver training program are, you will have drivers in your fleet that are either 1) unwilling or 2) unable to drive safely — consistently over time. 

Put it down on paper — Evaluate all candidates based on objective criteria derived fi om essential job functions and individual qualifications. A key factor in superior driver selection is the applicant s qualifications and ability to perform the essential functions of the job. Employment decisions based on accurate and up-to-date job descriptions may provide one of the best defenses to charges of discrimination. 

Description The great majority of preventable accidents can be shown to be directly related to the performance of the driver. It is therefore extremely productive to any fleet safety program to have careful new driver selection and adequate monitoring procedures for existing drivers. 

Optimize driver selection between motor and steam turbine... 

Therefore, a utility optimizer could determine the most efficient and economic operation to supply energy to satisfy process demand. There are several major options to achieve this overall goal including driver selection, utility equipment loading allocation, steam head pressure control, steam letdown rate minimization, power generation versus purchasing, and contract management. 

Trusted, trained and calibrated observers To promote trust in CORS, observers are peer train drivers, selected from expressions of interest, and specially trained in the technical and non-technical skills reqttired for conducting observations. Observers participate in regular calibration sessions to promote consistency and reliability of coding. 

Motor fleet risk management involves the consideration of matters such as vehicle acquisition, driver selection, training and supervision, vehicle accident reporting, recording, investigation and analysis of claims, vehicle security and the operation and maintenance of vehicle fleets. 

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