When two plates are placed end to end and are jointed by cover plates, the joint is known as ____ .
Noise levels can be measured by an instrument called ___ .
As a forewarned intervention, a traffic rotary is more safe than a signalized intersection, when the proportion of right-turning traffic exceeds ____ .
A Cement concrete pavement slab made of Premixed Quality Concrete should sustain a flexural stress up to ___ .
The eigenvalues of \(\begin{bmatrix} 0 & -i \\[0.3em]i & 0 \end{bmatrix}\)are ____ .
The system of equations \( 2x + 3y + 5z = 9 \); \( 7x + 3y - 2z = 8 \); \( 2x + 3y + \lambda z = h \) have a unique solution ____ .