Test for Juniors on the Reefer (CES v6.0)

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Правильні відповіді:
1

An electrical power emergency source on ship is required because:

Ваша відповідь правильна:

It satisfies the SOLAS (and other) requirement for the ship safety.
2

Why is precooling of cargo is important?

Ваша відповідь правильна:

Reefer cannot be used to reach the desired temperature, cargo of a reefer container has to be brought to the desired temperature prior to loading.
3

How does a reefer container work?

Ваша відповідь правильна:

The generator, placed on one side of the container, blows air into the container.
4

What is the reason for the superheat in reefer system?

Ваша відповідь правильна:

Low quantity of refrigerant in evaporator.
5

Which of the following should be used on an electrical fire (2 answers are correct).

Ваша відповідь правильна:

CO2 extinguisher.; Dry powder extinguisher.
6

Which parameters of the reefer container you should check after loading?

Ваша відповідь правильна:

Serial number, stowage position, set point, ventilation position, humidity set point, supply temperature, return temperature, active alarms, visual damages of refrigerated plant.
7

How to test dielectric gloves before work?

Ваша відповідь правильна:

Before use, the gloves should be inspected, paying attention to the absence of mechanical damage and fill gloves with hot fresh water.
8

What is the reason between dry and reefer container?

Ваша відповідь правильна:

The major difference between normal dry container and reefer container is that the temperature condition controlling system is available in reefer container.
9

What is Reefer container used for?

Ваша відповідь правильна:

Reefers are essential for worldwide trade of food.
10

What is the superheat in a refrigerated system?

Ваша відповідь правильна:

This is the difference between the boiling point temperature of refrigerant in the evaporator coil and the actual temperature of the refrigerant gas as at leave the evaporator.
11

According to the requirements of the SOLAS 74 convention, Emergency Diesel Generator (EDG) must take full ratred load no more than:

Ваша відповідь правильна:

45 sec.
12

What is a Reefer Container?

Ваша відповідь правильна:

Container is a type of shipping container that remains its cargo at a regulated cool temperature.
13

Which of these does not affect the temperature rise of the compressor discharge gases?

Ваша відповідь правильна:

Malfunction one of two return air sensors.
14

What is the first action if you find a reefer container in not working condition?

Ваша відповідь правильна:

Check main circuit breaker position (on/off) and the presence of power supply on each incoming phase with multimeter.
15

What is the correct stowage of the reefer on deck of container vessel?

Ваша відповідь правильна:

Motor to forward.
16

On a container vessel, what must be done as soon as reefer containers have been loaded?

Ваша відповідь правильна:

It must be connected to the ship power supply and their setting temperature verified.
17

What is the purpose of the Oil in the refrigerated systems?

Ваша відповідь правильна:

To lubricate the moving parts of the compressor.
18

What is the main signs of an insufficient freon gas level in the refrigerated system that we can easily see on the evaporator coil?

Ваша відповідь правильна:

The evaporator coil is frozen after the thermostatic valve at the beginning of the coil.
19

Based on pressure measurements, how to determine that the compressor is out of order?

Ваша відповідь правильна:

The suction pressure is less than the discharge pressure.
20

What is the normal suction pressure for compressor?

Ваша відповідь правильна:

Depend on the reefer container working mode and ambient temperature. Technical standards from the manufacturer that are specified in manual.
21

What is means “Ambient Temperature”?

Ваша відповідь правильна:

Outside temperature.
22

How to prepare reefer container system for safely welding work on the gas pipe?

Ваша відповідь правильна:

Switch off power supply and collect freon to the recovery balloon.
23

What is the function of a thermistor in the winding of an evaporator fan electric motor?

Ваша відповідь правильна:

Interrupt the operation of the electric motor in case of overheating.
24

How will a faulty capacitor of a single phase electrical motor affect its operation?

Ваша відповідь правильна:

Motor will not start.
25

What is means “Set Point”?

Ваша відповідь правильна:

Required temperature for transportation of cargo in reefer container.
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