Two-speed wiper motors generally use ________ to achieve the two speeds
A) Reduction gear transmission B) Cams
C) Gear reduction D) Speed control brushes
D
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When the coupling half must be lowered to correct vertical offset misalignment, shims are placed under the ________ of the MTBM
A) nearest end of the base plate B) rear lugs C) front lugs D) farthest end of the base plate
The relationships among the different design elements are called design ____________________.
Fill in the blank(s) with the appropriate word(s).
What are five general categories of plant materials commonly used in the landscape?
What will be an ideal response?
A) Find the rate at which work is added in the compressor, in kJ/min. B) Find the coefficient of performance of the refrigeration cycle. C) Find the specific enthalpy of the refrigerant when it is a saturated liquid at 300 K. D) All of the work for the compressor is supplied by a Rankine heat engine that has an efficiency of 25%. Find the rate at which heat is removed from the condenser in this Rankine heat engine.
3. A steady state refrigerator operates on the vapor compression cycle. The refrigerant, in the vapor phase, behaves as an ideal gas with CP*=6R, and the specific enthalpy of the compound in saturated liquid and saturated vapor states at 270 K is given in the table below.
• The flow rate of the refrigerant is 100 mol/min.
• The vapor entering the compressor is saturated vapor at 270 K.
• The efficiency of the compressor is 75%.
• The liquid exiting the condenser is saturated liquid at 300 K.
• The mixture exiting the valve is 20% vapor and 80% liquid.
• There is no significant pressure change in either heat exchanger.
