In a normally operating engine, intake and exhaust valves are opened by a cam and closed by the ________. 

Which of the following statements is TRUE about valve seats? 

Dampers (damper springs) are used inside some valve springs to ________. 

A valve should be discarded if the margin is less than ________ after refacing. 

To lower and narrow a valve seat that has been cut at a 45-degree angle, use a cutter or stone of what angle? 

A valve seat should be concentric to the valve guide to a maximum TIR (total indicator runout) of ________. 

Before a valve seat can be reconditioned or replaced, the ________ must first be reconditioned. 

Never remove more material from the tip of a valve than ________. 

Valve spring inserts (shims) are designed to ________. 

Umbrella-type valve stem seals ________. 

Technician A says that exhaust valve are normally larger than intake valves. Technician B says that the exhaust valve is about 50 percent of the size of the intake valve. Who is right? 

The type of valve in use today is a ________ valve. 

Technician A that says free and positive are two types of valve rotators. Technician B says that valve grinding should start with truing the valve tip; then the face should be refinished. Who is right? 

Valve stem height is most critical on which of these? 

If an interference angle is machined on a valve or seat, the angle is usually ________. 

The proper relationship between intake and exhaust valve diameter is ________. 

Technician A says that a pilot is placed into the valve guide to position the stone or cutter correctly for resurfacing the valve seat. Technician B says that he installed height should be checked and corrected with oversized valves, if needed. Who is right? 

Technician A says that valve stem height should be checked and the top of the valve ground, if necessary. Technician B says that after a thorough cleaning, the cylinder head should be assembled using new valve stem seals. Who is right? 

Technician A says that all valves rotate to help prevent the valves and seats from burning. Technician B says that positive type valve rotators are only used on intake valves. Who is right? 

Technician A says that the exhaust valve is larger than the intake valve to ensure that all the exhaust gases leave the cylinder. Technician B says that the exhaust valve is larger than the intake valve to ensure proper heat dissipation. Who is right? 

Which of these is the most common valve spring keeper? 

Installed height is the distance between the valve spring ________ and the underside of the valve spring retainer.