The camshaft makes ________ for every revolution of the crankshaft.

A DOHC V-6 has how many camshafts?

Which timing chain type is also called a" silent chain"?

Many technicians always use new push rods because ________.

Hydraulic valve lifters can make a ticking noise when the engine is running if ________.

Hydraulic lifters or hydraulic lash adjusters (HLA) may not bleed down properly and could cause an engine miss if________.

If lift and duration remain constant and the lobe center angle decreases, then ________.

The intake valve opens at 39° BTDC(before top dead center) and closes at 71° ABDC (After bottom dead center). The exhaust valve opens at 78° BBDC (before bottom dead center) and closes at 47°ATDC (after top dead center). Which of these is correct regarding this cam timing?

The maximum total indicator runout (TIR)of a camshaft should be less than ________.

Two technicians are discussing variable valve timing. Technician A says that changing the exhaust valve timing helps reduce exhaust emissions. Technician B says that changing the intake valve timing helps increase low-speed torque. Who is right?

Technician A says that the push rods should be rotating while the engine is running if the camshaft and lifters are okay. Technician B says that the camshaft rotates at one-quarter the crankshaft speed. Who is right?

Technician A says that silent chains are quieter than roller chains and do not stretch with use. Technician B says that on overhead valve engines, the camshaft is usually placed in the block above the crankshaft. Who is right?

Flat-bottom valve lifters rotate during operation because of the ________ of the camshaft.

Which term is used to describe the number of degrees of crankshaft rotation for which the valve is lifted off the seat?

Technician A says that valve overlap is the number of crankshaft degrees that both valves are closed. Technician B says that valve overlap is the number of degrees that both valves are open. Who is right?

Camshafts turn at which of these?

If the exhaust valve opens at 57° BBDC(before bottom dead center) and closes at 29° after TDC (top dead center), what is the exhaust valve duration in degrees?

What determines the amount of valve overlap?

Valve lifters are designed in which ofthese ways?

On an engine with variable cam timing, the cam timing can be changed by use of ________.

Two technicians are discussing an engine with an interference design. Technician A says if a valve remains open when its cylinder reaches TDC, the piston may strike the valve. Technician B says if a valve remains open when its cylinder reaches TDC, valvetrain damage can result. Which technician is correct?

On a vehicle with cylinder deactivation, the valves are kept closed by deactivating the ________.

A cylinder deactivation system uses________ to operate the system.

Variable cam timing technology is used on the exhaust cam only.

The PCM controls cam timing by use of a________.

The valves could be bent if the timing belt breaks on which of these?

The movement of the camshaft lengthwise in the engine during operation is controlled by a ________ between the camshaft drive gear or sprocket and a flange on the camshaft.