GM Locomotive Engineering

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Questions and Answers

What is the minimum oil pressure required at idle for the engine?

8-12 PSI (correct)

25-29 PSI

15-20 PSI

5-7 PSI

What feature shuts down the engine in case of insufficient oil pressure?

Governor shutdown feature (correct)

Turbo charger

Soak back pump

Oil filter

What is the role of the soak back pump?

To cool the engine during operation

To increase oil pressure in the engine

To filter lube oil from the engine

To lubricate turbo charger before engine start (correct)

What happens when the soak back filter bypass valve is activated?

Oil bypasses the filter to protect the turbo charger (A) Signup and view all the answers

When does the soak back pump automatically start operating?

Before cranking the engine (A) Signup and view all the answers

What is the total power output of the GM locomotive?

4000 BHP (A) Signup and view all the answers

Which type of engine configuration is used in the GM locomotive power pack?

16-cylinder V-arrangement (C) Signup and view all the answers

How does the fuel efficiency of the GM locomotive compare to ALCO design locomotives?

11% better (D) Signup and view all the answers

What is the compression ratio of the engine in the GM locomotive?

16:1 (C) Signup and view all the answers

What is the maximum voltage output of the traction alternator in the GM locomotive?

2600 VDC (A) Signup and view all the answers

What type of alternator is included in the main generator assembly of the GM locomotive?

CA6B (C) Signup and view all the answers

Which of the following features is not associated with the GM locomotive?

Three-stroke engine (B) Signup and view all the answers

What is the primary function of the EM 2000 display panel?

To provide a diagnostic interface between the control computer and the operating crew (C) Signup and view all the answers

Which component is not part of the back panel of the electrical control cabinet?

TCC electronic blowers (D) Signup and view all the answers

How many push button keys does the keypad on the EM 2000 display panel have?

16 (A) Signup and view all the answers

What is the purpose of the circuit breaker panel in the context provided?

To control the electrical flow and protect against overloads (A) Signup and view all the answers

Which of the following components helps to keep other electrical components cool and dust free?

Electrical cabinet Blower (A) Signup and view all the answers

What do TCC1 and TCC2 represent in the traction control converter compartment?

Traction Control Converters (A) Signup and view all the answers

Which component is present in the main generator compartment?

Traction Motor blower (D) Signup and view all the answers

What purpose does the DC link transfer switch serve?

To manage power distribution between devices (C) Signup and view all the answers

What are Dynamic Grid Cooling fans used for?

To maintain optimal temperatures within the traction control converter compartment (A) Signup and view all the answers

What is the primary purpose of the suction strainer in the fuel feed system?

To separate foreign particles from the fuel oil. (A) Signup and view all the answers

At what pressure does the primary filter's bypass valve open?

30 PSI (A) Signup and view all the answers

What happens when the secondary filters are choked and the pressure difference reaches 60 PSI?

Fuel is diverted back to the fuel tank. (C) Signup and view all the answers

Which component is responsible for supplying an adequate quantity of fuel at various loads?

Fuel pump (C) Signup and view all the answers

What indicates a clogged primary filter in the fuel system?

Pressure difference reaching 30 PSI (D) Signup and view all the answers

Which of the following best describes the secondary filters?

They are of spin-on type and have a bypass valve. (C) Signup and view all the answers

What is the role of the sight glass in the fuel system?

To show the condition of the filters. (C) Signup and view all the answers

Where does the fuel go after passing through the secondary filters?

To the engine mounted unit injectors. (D) Signup and view all the answers

Which component protects the fuel injectors from unfiltered fuel oil?

Secondary filter bypass valve (D) Signup and view all the answers

What is a consequence of a clogged primary filter?

The flow of bypass fuel increases. (C) Signup and view all the answers

What is the purpose of the fuel oil system in the GM locomotive?

To supply fuel to the engine (A) Signup and view all the answers

Which component is NOT part of the electrical system in the GM locomotive?

Primary Fuel Filter (D) Signup and view all the answers

What is the role of the air compressor in the GM locomotive?

To supply compressed air for brake systems (A) Signup and view all the answers

Which of the following does NOT contribute to engine cooling?

Air Brake Rack (A) Signup and view all the answers

Which system is responsible for supplying the engine with fuel at the appropriate time?

Fuel Pump (A) Signup and view all the answers

What is the purpose of the lube oil filter tank?

To remove contaminants from lube oil (B) Signup and view all the answers

Which component helps in regulating the engine's fuel usage?

Governor (D) Signup and view all the answers

Which of the following components is used for cooling the traction motors?

Traction Motor Cooling Air Blower (A) Signup and view all the answers

Which of the following components serves as an air filter in the locomotive?

Inertial Air Filters (C) Signup and view all the answers

What is the function of the engine exhaust stack?

To expel exhaust gases from the engine (C) Signup and view all the answers

Study Notes

Introduction Handbook on General Motor Diesel Locomotive

This handbook is for Indian Railway diesel locomotive maintenance staff
The handbook was prepared by CAMTECH in February 2006
It provides introductory information on GM locomotives
The GM locomotives are now included in Indian railway's diesel locomotive fleet
The 4000 HP, computer-controlled GM locomotives have several improved features compared to Alco designs
Suggestions for improvements to the handbook are welcome and will be considered for future editions

Book Details

Name: Introduction Handbook on General Motor Diesel Locomotive
Reference No: IRCAMTECH/2006/M/D/GM loco/1.0
Edition: First Edition
Year of Publication: 2006
Target group: Diesel shed's staff
Total number of pages: 72

Preface

The GM locomotives have been added to Indian Railways' diesel locomotive fleet, with production starting at DLW, Varanasi
The GM locomotives have advanced features compared to existing Alco designs
This handbook aims to educate diesel loco maintenance personnel about GM locomotives

The handbook contains detailed information on the GM locomotives, including:
- Introduction of the GM Locomotive
- General information data
- Various parts and their location
- Fuel oil system
- Cooling water system
- Lube oil system
- Air intake system
- Compressed air system
- CCB Air Brake System
- Electrical System
- Computers control of locomotive
- Major equipments of GM locomotives
- Differences between WDG4 & WDP4 locomotives

Introduction to the GM Locomotive

WDG4 and WDP4 series locomotives are GM locomotives
GT46 MAC is for goods service, GT46 PAC for passenger service
Engine model number is 710G3B
Equipped with a microprocessor-based computer control system (EM-2000)
Includes a diagnostic display system (DDS)
Monitors and controls traction power
Records and indicates faults, allows diagnostic testing

General Information Data

Locomotive Model Designation: GT46MAC
Under Truck Type: CO-CO
Nominal Locomotive Power: 4000 HP
Engine Model(s): 710G3B
Number of Cylinders: 16
Engine Type: Two-Stroke, Turbo Charged
Cylinder Arrangement: 45° V Arrangement
Compression Ratio: 16:1
Displacement per Cylinder: 11635 cm³ (710 Cu.In)
Cylinder Bore: 230.19 mm (9-1/16")
Cylinder Stroke: 279.4 mm (11")
Rotation (Facing Generator End): Counter-clockwise
Full Speed: 904 RPM
Normal Idle Speed: 269 RPM
Low Idle Speed: 200 RPM
Main Generator: TA17-CA6B
Traction Alternator: TA17
Companion Alternator: CA6B
Maximum Voltage: 2600 VDC

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Description

Test your knowledge on the engineering specifics of GM locomotives. This quiz covers various aspects such as oil pressure requirements, engine configuration, and comparisons with ALCO locomotives. Perfect for enthusiasts and professionals in the field of railway engineering.