| 01 |
What is the purpose of Walk-in-Freezer ? |
| Ans |
Walk-in-Freezers are used for bulk storage of Polio vaccine at state/regional level at temperatures between -180 C To -200 C |
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| 02 |
What is hold over time for Walk-in-Freezer in case of power failure ? |
| Ans |
Hold over time is about 4-6 hours in case of power failure |
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| 03 |
What is the purpose of Walk-in-Cooler ? |
| Ans |
Walk-in-coolers are used for bulk storage of vaccines at +40C to +80C |
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| 04 |
What does the name indicate i.e. Walk-in-Cooler or Walk-in-Freezer ? |
| Ans |
The name "Walk-in" is given as one can walk info the storage spaces inside these rooms. |
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| 05 |
How the capacity of Walk-in-Cooler is measured ? |
| Ans |
Capacity of Walk-in-Cooler is measured in Cu.m. |
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| 06 |
What are the common sizes of Walk-in-Cooler / Freezer? |
| Ans |
16 Cu.M., 20 Cu.m. , 32Cu.m., 40Cu.m..
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| 07 |
In case of mains power failure what precautions are to be taken to run the WIC or WIF ? |
| Ans |
Standby Generator has to be made available to run the Walk-in-Cooler or Walk-in-Freezer in case of power failure.
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| 08 |
What are the conditions when Generator gets automatically started to run the WIC or WIF ? |
| Ans |
If there is mains power failure or single phasing or low & high voltage. |
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| 09 |
What is the basic purpose of 12 volt car battery ? |
| Ans |
To start the generator engine |
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| 10 |
What is the function of alarm system in WIC & WIF ? |
| Ans |
An alarm system is provided to monitor cold / freezer room temperature. It monitors low & high temperature continuously. |
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| 11 |
What is the function of temp recorder ? |
| Ans |
The temperature recorder records the cooler / freezer room temperature continuously on a circular chart. |
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| 12 |
Which type of refrigerant is used in newly supplied WIC / WIF ? (MPP13A, MPH36A, EUROMON) |
| Ans |
Refrigerant R404A - NON CFC. |
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| 13 |
Give some information regarding R404A refrigerant |
| Ans |
Blend of (R125+R143+R134a)
Formula = OHF2CF3 / CF3OH2F / OH3CF3
Boiling point = -46.30C
ODP = 0 , GWP= 0.36
Appearance & odour = Colourless liquified gas
Packing = 10.9 Kg steel Cylinder.
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| 14 |
Which type of refrigerant was used in the earlier version of WIF ? |
| Ans |
Refrigerant R502. |
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| 15 |
Give some information regarding R502 refrigerant |
| Ans |
Azeotrope Blend of R22 + R115
R502 = R22 = 49 % & R 115 = 51 %
This is low temperature refrigerant
Boiling point = -45.60C
ODP = 0.18 , GWP = 3.8- 4.
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| 16 |
Which oil is recommended with R404a refrigerant ? |
| Ans |
Mobil EALTM Arctic 46 , Polyolester lubricant. |
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| 17 |
What is the general interval of defrosting in WIF ? |
| Ans |
In WIF general interval of defrosting is 12 hrs. |
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| 18 |
How many temperature sensors can be connected to Temperature Alarm Unit VHA 12/4? |
| Ans |
Four temperature sensor can be connected to VHA 12/4 -1 Alarm unit.. |
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| 19 |
Specification of 'CLAUDE LYONS' automatic voltage stabilizer. |
| Ans |
Type : TS - 2.5/3 X S1782
Input : 300 - 414V, 47- 65 Hz;
Output : 380 / 220 +; nbsp; + 0.5 %
3 X 13 A
8.6 KVA
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| 20 |
Why is defrosting necessary ? |
| Ans |
The moisture in the air inside the cold room gets frozen & forms frost on the evaporator coils of the units. For better cooling efficiency.it is to be melted at regular time intervals. |
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| 21 |
State probable cause of petrol engine start failure. |
| Ans |
1. No. Fuel in the tank
2. Fuel Valve closed
3. Choke is not working
4. Fuel overflow in carburetor.
5. Dirty spark plug.
6. Low battery
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| 22 |
Specification of Honda G400 petrol Engine. |
| Ans |
Engine oil capacity - 1.2 kg
Spark - plug gap - 0.6 mm to 0.7 mm
Valve clearance inlet - 0.06 to 0.12 mm
Exhaust - 0.09 to 0.15 mm
Engine oil - SAE10W - 40 (depending on ambient temperature)
R.P.M. = 3000
H.P. = 10
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| 23 |
Specification of Honda G400 petrol Engine. |
| Ans |
1. Engine failure
2. Too low lube oil pressure
3. Too High Engine temperature
4. Phase reversal.
5. Runaway speed of Engine.
6. Maintenance hours .
7. Overloading of Engine
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| 24 |
Which conditions are generally monitored by AMF panel meant for Genset ? |
| Ans |
1. Engine failure
2. Too low lube oil pressure
3. Too High Engine temperature
4. Phase reversal.
5. Runaway speed of Engine.
6. Maintenance hours .
7. Overloading of Engine
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| 25 |
What are the regular checks for lead acid battery ? |
| Ans |
Battery specific gravity
Battery acid level
Battery terminal / pole connection
Battery firm on frame
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| 26 |
For entrancing engine life which parts of engine require periodical attention ? |
| Ans |
Engine oil filter
Air filter
Fuel filter
* Check oil level by the dipstick daily.
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| 27 |
How we can measure the specific gravity of battery? |
| Ans |
Using hydrometer. |
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| 28 |
Which apparatus is used to test the cells of battery? |
| Ans |
Cell- tester |
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| 29 |
Which apparatus is used to test the cells of battery ? |
| Ans |
Maximum H.P = 11, R.P.M. = 3600
Fuel consumption = 200-210 Hrs/100-hrs.
Fuel tank capacity = 5 ltrs.
Oil sump capacity = 1.8 ltrs.
Engine oil = SAE 10-40
Compression ratio = 17.5 : 1.
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| 30 |
General Maintenance for Diesel Engine |
| Ans |
1. Engine oil level check
2. Engine oil change
3. Air cleaner element check
4. Air cleaner element cleaning
5. Fuel filter cleaning
6. Injector nozzle checking & cleaning .
7. Valve clearance check & adjust.
8. Combustion chamber cleaning
9. Fuel tank & fuel line cleaning.
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| 31 |
Technical data for lomardine Diesel Engine. Model 9LD561 - 2 L |
| Ans |
No. of Cylinders - 2
Bore - 90 mm, stroke - 88 mm
Compression ratio - 17.2 : 1
RPM - 1500 , Min. idling speed - 1000 - 1100 RPM,
Oil sump capacity = 3.05 kg, H.P. = 8,
Valve clearance - Inlet - 0.20 mm
(Cold Engine) Exhaust - 0.20 mm
Fuel tank capacity = 10 ltr.
Engine oil grade = SAE 10W / 40
(Depends on ambient temperature)
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| 32 |
Give specification of Compressor used in Faster WIC.? |
| Ans |
L'UNITE - CAJ4511A
In = 5.3A, Id = 25A, 220V - 240V, 50Hz.
1220VA (975W)
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| 33 |
Give specification of compressor used in Huurre WIC |
| Ans |
ASPERA : J6226M
Input power = approx. 1 KW.
Resistance (ph-ph) = 14.38 Ω
Start current = 13A, Run current = approx .2A
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| 34 |
Give specification of compressor used in HUURRE W.I.C. |
| Ans |
L'UNITE : TAJ 4511A
340-420V, 50Hz, 3ph
Winding resistance (1,2,3)= 14.5 Ω each.
In = 1.9A
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| 35 |
What is the pressostat setting in faster W.I.C. ? |
| Ans |
Following are the set limits of HP/LP switch.
HP . - 300 psi
LP - 25 psi ----------Cut off just above vaccum,
----------------------------------Cut on at about
Differential - 25 psi
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| 36 |
What is the pressostat setting in Huurre WIC ? |
| Ans |
Following are the set limits of HP / LP switch
L.P. = 2.0 bar - variable / adjustable
H.P. = 12.0 bar
At this setting unit will run
L.P. = 0.1 bar
H.P. = 16.0 - Variable /adjustable
At this setting and will trip off
Differential setting
L.P. = 1.0 bar
H.P. = 3.6 bar
Setting for condenser fan
H.P. = 9.0 bar - fan on
(low)H.P. = 7.0 bar fan off
Differential = 2.0 bar
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