Yeh they can be . If they give you the gs then they might be worth one mark each if they ask you to calculate the gs they will be worth two but sometimes they give you mach numbers and wind so you have more work to do meaning more marks , the general rule is the more work you have to do the more marks avail. The above mentioned plog question is a 3 marker and is a drain on time . Other two markers are scale questions and most crp/5 as i recall are two markers but stnd to be corrected . The BGS QB does not reflect the marks avail on the exam you will have to wait till the day and read the marks carefully.
In short if there is maths , chart , or crp/5 work in the question they will generally be worth more There might actually only be two CRP/5 questions ie hdg and gs types but there may be more integrated elewhere in the paper ie the pet/psr questions where you have to work out winds and convert mach numbers etc etc .
Know you crp/5 you dont wanna be dropping two marks cos youve forgotten how to work out basic wind calculations
Good Luck