DIVIDE (v),
 DIVIDES, DIVIDED, DIVIDED  1. To make into parts or groups
 2. To do "mathematical" division (TN)  YOU CAN DIVIDE THE DRAINS INTO THREE PRIMARY GROUPS.
 DIVIDE THE CROSSWIND COMPONENT BY THE AIRCRAFT SPEED TO GET THE CORRECTION.  
 DO (v),
 DOES, DID, DONE  1. To complete a procedure, task or step  DO A FUNCTIONAL TEST.  
    2. Make  DO THE REPAIRS.  
    3. As a helping verb     
    a. as part of a negative "command" or "statement"  DO NOT MOVE THE XXXX IF THE UNIT DOES NOT OPERATE.  
    b. as part of a "question"  DOES THE LIGHT COME ON?  
 don (v)  PUT ON, USE  PUT THE MASK ON AND BREATHE THROUGH IT TO MAKE SURE THE OXYGEN SUPPLY IS CORRECT.  Don mask and breathe through it to check oxygen supply.
      YOU MUST USE PROTECTIVE GOGGLES WHEN YOU DO WORK ON FIRE EXTINGUISHERS.  You must don protective goggles when working on fire extinguishers.
 double (adj)  TWO (TN)  YOU MUST SEE TWO MARKS ON THE STAND.  Double marks must appear on the stand.
 doubt (n)  NOT SURE (adj), THINK (v)  IF YOU ARE NOT SURE IF THE UNIT IS SERVICEABLE, DO A STANDARD SERVICEABILITY TEST (SST).  If there are doubts about the serviceability of the unit, carry out a standard serviceability test (SST).
       IF YOU THINK THE RESULT IS INCORRECT, DO THE TEST AGAIN.  If you are in doubt about the result, repeat the test.

 
 
 DOWN (adj)  In a position "below"  MOVE THE SWITCH TO THE "DOWN" POSITION.  
 DOWN (adv)  To a position "below"  THE POINTER MOVES DOWN.  
 DOWN (pre)  To a position "below"  LET THE SLEEVE MOVE DOWN THE GUIDE TUBE.  
 DOWNSTREAM (adj)  In the direction of the flow  DISCONNECT THE DOWNSTREAM CONNECTION.  
 DOWNSTREAM (adv)  In the direction of the flow  MOVE THE PROBE DOWNSTREAM AND MONITOR THE TEMPERATURE AGAIN.  
 DOWNSTREAM OF (pre)  In the direction of the flow  DISCONNECT THE CONNECTION DOWNSTREAM OF THE VALVE.  
 downward (adv)  DOWN  MAKE SURE THE AIR OUTLET POINTS DOWN.  Make sure that air outlet is positioned downward.
drag (v)  PULL  PULL THE WIRES THROUGH THE CONDUIT.  Drag the wires through the conduit.
 DRAIN (v),
 DRAINS, DRAINED, DRAINED  To remove liquid  DRAIN THE SYSTEM FULLY.