Assessment Test

NEXT

1. What type of a multi-phase pump that are basically multistage centrifugal pumps and widely used in oil well application as a method for artificial lift?

 
 
 
 

2. What type of a multi-phase pump that are single screw type typically used in shallow well of at the surface?

 
 
 
 

3. What is often used to broadcast sound of PA system in outdoor locations?

 
 
 
 

4. What is an electronic sound amplification and distribution system with a microphone, amplifier and speakers used to allow a person to relay information in small or large crowd?

 
 
 
 

5. Which of the following occurs when the sound from the speakers of a PA system is picked up by the microphone and is then re-amplified and sent through the speakers again? I.Acoustic feedback II.Audio feedback III.Static feedback

 
 
 
 

6. The potential audio feedback from a PA system occurs when the sound from the speakers is picked up by the microphone and sent back to the speakers again through _________.

 
 
 
 

7. A load high pitched squeal or screech that occur in a PA system when the volume of the system is turned up too high is often called ________.

 
 
 
 

8. PA system feedback only occurs when the loop gain of the feedback loop is _________.

 
 
 
 

9. The feedback in a PA system will only occur when _________.

 
 
 
 

10. The feedback of a PA system can always be stopped by _________.

 
 
 
 

11. There are several steps to maximize gain before feedback , including keeping microphones at a distance from speakers and lowering gain levels at frequencies where the feedback is occurring, using a ________. I.Equalizer II.N otch filter III.Graphic filter

 
 
 
 

12. What is the primary satellite communications system on board?

 
 
 
 

13. What kind of communication system used on board for voice, data and facsimile communications?

 
 
 
 

14. For ship at sea fitted with radiotelegraphy shall carry ________.

 
 
 
 

15. For ship at sea fitted with radiotelegraphy but not fitted with an auto alarm shall ________.

 
 
 
 

16. For ship at sea fitted with radiotelegraphy but not fitted with an auto alarm shall listen continuously on the Inmarsat distress frequency by means of a radio officer using a ________.

 
 
 
 

17. What type of positive displacement pump that contain fluid within a flexible tube fitted inside the circular pump casing?

 
 
 
 

18. What type of positive displacement pump that are widely use for pumping difficult materials such as sewage sludge contaminated with large particles, this pump consist of helical rotor about ten times as long as its width?

 
 
 
 

19. Which of the following is/are NOT a characteristic of a velocity pump?

 
 
 
 

20. What type of a multi-phase pump, a rotodynamic pump with one single shaft that requires two mechanical seal, it often called a Poseidon pump?

 
 
 
 

21. What type of a multi-phase pump that is constructed of two inter-meshing screws that move the pumped fluid?

 
 
 
 


Total Rating:


click here to go to review now