20. Of these four materials used as a dielectric, which is the best insulator?

a. Pure water

C. Glass

b. Petroleum

d. Air

Gasoline flows through the 2 cm diameter hose in a gas station at a speed of 0.7 m/s. If the gas tank in my car has a capacity of 10.6 gallons (0.

The brake pad has a block of material fastened to a metal backing plate? A) Steel B) Wood C) Friction D) Oily

A multi-plate clutch is to transmit 12 kW at 1500 rev/min. The inner and outer radii for the plates are to be 50 mm and 100 mm respectively. The maximum axial spring force is restricted to lkN.

An exercise room has six weight-lifting machines that have no motors and seven treadmills, each equipped with a 2.5-hp (shaft output) motor. The motors operate at an average load factor of 0.7, at which their efficiency is 0.77.

A shunt regulator utilizing a zener diode with an incremental resistance of 8 is fed through an 82 - resistor. If the raw supply changes by 1.0 V, what is the corresponding change in the regulated output voltage

The Reynolds number, rhoVD/μ is a very important parameter in fluid mechanics. Determine its value for ethyl alcohol flowing at a velocity of 4 m/s through a 2-in.-diameter pipe.

Work done by a system during a process can be considered as a property of the system. a) True b) False

When the compression process is non-quasi-equilibrium, the molecules before the piston face cannot escape fast enough, forming a high-pressure region in front of the piston. It takes more work to move the piston against this high-pressure region.

hypothetical A-B alloy of composition 40 wt% B-60 wt% A at some temperature is found to consist of mass fractions of 0.66 and 0.34 for the α and β phases, respectively.

10. Which of these requires a wheel alignment after replacement? A. Struts B. Shocks C. Both