Twin tower enthalpy recovery loops are used mainly for _____.
a. steam system heat recovery
b. comfort air conditioning
c. increased heat wheel capacity
d. desiccant dehumidification
b. comfort air conditioning
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Increasing the airflow across a coil:
A) Increases the temperature drop across the coil. B) Increases the static pressure drop across the coil. C) Decreases the static pressure drop across the coil. D) Increases the latent cooling capacity of the coil.
A 16 kW, 220 V, dc series motor has its armature current equal to 86 A when the motor speed is 600 rpm. The armature resistance of the motor is 0.198 ?, and the field resistance is 0.l ?. The motor voltage can be adjusted by means of solid- state devices. The motor is to be used to lower a load by countercurrent braking (reversing Ea ) at an armature current of double the rated value, and at a speed of l0 rpm. Determine the terminal voltage required for this operation.
What will be an ideal response?
To lubricate by means of sinking the part to be lubricated into the lubrication is referred to as the ____ method of lubrication.
A. wick B. drip C. submersion D. drowning
There are two major types of overload relays: thermal and ____.
A. circuit B. metallic C. magnetic D. electric