Can a MySQL table have multiple primary keys? No, we can’t. A table can have only one Primary Key. The Primary Key can be defined on a single column or more than one columns. If the Primary Key is defined using more that one column, it is known as a Composite Key (or Composite Primary […]
How often should you flush a probe type low water cutoff? every 7-10 days Proper steam boiler maintenance is very important. If your boiler is equipped with a #67 low water cut-off be sure to flush it every 7-10 days during the heating season. How do you flush a low water cut off? Purging is […]
What is a rarefaction in sound? rarefaction, in the physics of sound, segment of one cycle of a longitudinal wave during its travel or motion, the other segment being compression. A succession of rarefactions and compressions makes up the longitudinal wave motion that emanates from an acoustic source. What is the correct definition of a […]
What is Danaher Business System Tools? We call it the Danaher Business System (DBS), and it drives every aspect of our culture and performance. We use DBS to guide what we do, measure how well we execute, and create options for doing even better—including improving DBS itself. What are some of the key metrics used […]
How does a sea scooter work? How are sea scooters powered? Most sea scooters are powered by battery and these are rechargeable. The sea scooter provides forward propulsion through a basic propeller system at the rear. This is allows you to travel more efficiently underwater when you are diving. Are sea scooters good? Seal seascooter […]
Why did Richard Schiff leave West Wing? Schiff said how in the later episodes, his and his colleagues’ episodes were cut down which he claimed was “purely a financial decision” as they were “expensive actors”. For Schiff, this felt like an inaccurate portrayal of his character which he had spent years developing throughout The West […]
Which part of Jamaica has the best nightlife? Big areas for nightlife include Jamaica’s capital, Kingston, and it’s second city, Montego Bay – check the Daily Gleaner, the Jamaica Observer and the Jamaica Star for the low-down on who’s playing when and where – but wherever you go, there is music to be found. This, […]
How do you choose an art exhibition? There should not be an expectation that an exhibit will be chosen simply because it meets these criteria. Artistic and creative excellence. Cultural significance. Educational and professional background of the artist. Spatial capacity and compatibility. Adequacy of purpose to primary goal of the institution. What makes a good […]
What is DIN 3869? DIN 3869 profile rings are axially static soft seals in combination with threaded elements. They are molded from elastomers used for sealing threaded tube con- nections and fittings. Most common application, construction machinery, hydraulic presses, injection machines, etc. What is profile seal? Axially static soft seals combined with threaded elements are […]
What are blue banded bees? Blue Banded Bees are amongst our most beautiful Australian native bees. They are about 11 mm long and have bands of metallic blue fur across their black abdomens. Blue Banded Bees are solitary bees. Blue Banded Bees can perform a special type of pollination called ‘buzz pollination’. What are blue […]
