Mine Environment Questions and Answers

1. it plays an important role in human tolerance of high wet bulb temperature

1. acclimatization
2. saturation
3. radiation
4. asphyxia

2. kata thermometer is used to learn

1. wet bulb temperature
2. dry bulb temperature
3. cooling time
4. heat convection

3. which of the following refrigerant is used as coolant in KGF reef champion mine

1. CH4
2. CaCl2
3. CCL2F2
4. NH3

4. it is a psychological index of comfort under certain environment developed by medical research council of Britain

1. cooling power
2. P4SR
3. WBGT
4. cooling load

5. which of the following drilling causes less bit wear

1. wet drilling
2. dry drilling
3. holman wet drilling
4. konningsonborn drilling with water flushing

6. this is the temperature developed by yaglou to combine DB, WB, air velocity to a thermo-equivalent condition of still, saturated air

1. globe temperature
2. effective temperature
3. room temperature
4. Deep body temperature

7. which of the following instrument is preferably used for counting and size analysis of a suspended cloud of aerosols

1. gravimetric dust sampler
2. tyndalloscope
3. holographic system
4. dust settling ionizers

8. it has a large latent heat of evaporation, evaporates and condenses nearly at atmospheric temperature and pressure identify it

1. refrigerant
2. centrifugal compressor
3. brine water
4. sodium chloride solution

9. it is the ratio of the power actually absorbed by the impeller and converted into the head of the power applied to the shaft

1. volumetric efficiency
2. static efficiency
3. total efficiency
4. mechanical efficiency

10. it is the equation which gives the estimate of the pressure drop for laminar flow of viscous fluids through pipes. Name the equation

1. kinematics viscosity equation
2. poiseuille equation
3. bernoullis equation
4. karman resistance equation