  We present Chandra X-ray observations of 14 radio-loud quasars at redshifts
$3 < z < 4$, selected from a well-defined sample. All quasars are detected in
the 0.5-7.0 keV energy band, and resolved X-ray features are detected in five
of the objects at distances between 1-12" from the quasar core. The X-ray
features are spatially coincident with known radio features for four of the
five quasars. This indicates that these systems contain X-ray jets. X-ray
fluxes and luminosities are measured, and jet-to-core X-ray flux ratios are
estimated. The flux ratios are consistent with those observed for nearby jet
systems, suggesting that the observed X-ray emission mechanism is independent
of redshift. For quasars with undetected jets, an upper limit on the average
X-ray jet intensity is estimated using a stacked image analysis. Emission
spectra of the quasar cores are extracted and modeled to obtain best-fit photon
indices, and an Fe K emission line is detected from one quasar in our sample.
We compare X-ray spectral properties with optical and radio emission in the
context of both our sample and other quasar surveys.
