Exam 19: Producing Power: Valve Timing, Power and Torque Measurement

List three methods of adjusting cam phasing.

When a cam lobe is ground differently on its opening and closing sides, this is known as a(n) _____ cam lobe.

Both of the following cams have intake and exhaust lobes of identical lift and duration. Which has more overlap, the camshaft with lobe centers at 112° or the camshaft with lobe centers at 114°?

Which dynamometer design deals with higher loads more effectively: water brake or eddy current?

Two technicians are discussing how excessive valve overlap affects a turbocharged engine. Technician A says that a turbocharger operates on backpressure in the exhaust. Technician B says that if the turbo operates at too low an rpm, backpressure can flow through the open exhaust valve into the intake air stream, limiting boost pressure into the cylinder. Who is right?