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The most common size of a compressive strength cylinder is

A Swiss hammer has an accuracy of between _________ and _______ percent, depending on how well it is calibrated.

A snap tie is made of a single piece of wire cut to length and headed at each end.  

Concrete is properly vibrated when ________________ .

___________ should be placed in the corners of forms to produce beveled edges on permanently exposed concrete surfaces (see the column in MDL 211)

Forms should be clean, tight and ________________

When using a Swiss hammer, it is usual practice to take 10 readings and then average them.  

The most accurate method for testing the compressive strength of hardened concrete is _______.

A mutation causes a gene to become unable to assess the integrity of the genome normally. Which term best describes this gene?

Colorblindness is a recessive sex linked disorder in humans resulting in an inability to see red/green color in individuals with the mutation. A woman who is a homozygous normal marries a man who is colorblind. What are the phenotypes of the sons and how often will they occur?   You are required to show your work in order for your answers to be counted for this question.