How should you preflight check the altimeter prior to an IFR flight?

Altimeter setting is the value to which the scale of the pressure altimeter is set so the altimeter indicates

The local altimeter setting should be used by all pilots in a particular area, primarily to provide for

Which instrument provides the most pertinent information (primary) for pitch control in straight and level flight?

(Refer to figure 38.) What CAS must be used to maintain the filed TAS at the flight planned altitude if the outside air temperature is +05 °C?