Question

When should a hyphen be used to label aircraft?

1) When numbers and letters are used
2) When only numbers are used
3) When only letters are used
4) Hyphens should not be used to label aircraft

Answer 1

In English, a hyphen should be used to label aircraft when numbers and letters are used. Hyphens should not be used when only numbers or only letters are used.

Step-by-step explanation:

In English, a hyphen should be used to label aircraft when numbers and letters are used to identify the aircraft. For example, if the aircraft is labeled as 'Boeing 747-400', the hyphen is used to separate the model number (747) and the variant (400).

When only letters are used to label aircraft, hyphens should not be used. For instance, an aircraft with a label 'Airbus A380' does not require a hyphen.

Similarly, when only numbers are used to label aircraft, hyphens should not be used. For example, an aircraft labeled 'Boeing 777' does not require a hyphen.