Mining Machinery Questions and Answers - 2

1. A dragline is specified by

1. Bucket capacity only
2. Boom length only
3. Bucket capacity and Boom length
4. Power of the machine

2. On a curved track, _______ force creates a tendency for the train of tubs to leave the track, causing excessive wear on the wheels

1. Gravitational
2. Frictional
3. Torsional 4. Centrifugal

3. Sandwich conveyor is a type of

1. Cable belt conveyor
2. High angle conveyor
3. Chain conveyor
4. Shaker conveyor

4. Head developed by the pump does not depend on

1. Design of the casing
2. Design of the impeller
3. Speed of the impeller 4. Size of the delivery pipe

5. The unit of Earth Pit Resistaance is

1. Ohm
2. Kilo ohm
3. Mega ohm
4. Giga ohm

6. Trailing cable used in portable / transportable equipments should be

1. 2 Core
2. 3 Core
3. 4 Core 4. 5 Core

7. No haul road in an opencast mine shall have a gradient more than

1. 1 in 10
2. 1 in 12
3. 1 in 14 4. 1 in 16

8. Gas used in the suspension system of a dumper

1. Oxygen
2. Helium
3. Nitrogen
4. Hydrogen

9. The electrolyte of a battery is a diluted

1. HNO3
2. H2SO4
3. HCL
4. H3PO4

10. Squirrel Cage induction motor is mainly used with

1. Endless haulage
2. Main & tail rope haulage
3. Tail rope haulage
4. Belt Conveyor