List the various types of bird feathers and the purpose for each
What will be an ideal response?
Contour feathers on the wings and tail cover the body and give the bird shape. Feathers on the wing are rectrices, tail feathers are remiges. Down feathers give the bird warmth. Semi-plumes (under the contours) offer insulation. Powder Down produces powder for water-proofing feathers. Filoplumes are hair-like, with barbs along the shaft to help guide the bird in flight and rearrange the feathers. Bristle feathers are on the head and around the eyes and nares. These are sensory feathers. (Blood feather is not an acceptable answer; all feathers begin as blood feathers.)
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List two common HC refrigerants.
What will be an ideal response?
The maximum pressure drop for a suction line should not exceed:
A) 3 psi. B) 1 psi. C) 2 psi. D) A corresponding saturation temperature drop of 2°F.
Which of the following statements regarding discrimination issues is true?
a. Employers can avoid gender-related issues by hiring only men. b. Employers can minimize workplace discrimination by hiring based on valid, job-related requirements. c. Employers avoid claims of job discrimination by hiring anyone who applies for a job, if a position is available. d. Employers are justified in ignoring claims of sexual harassment against male employees.
It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?
A. To produce shunting reactance across the guide B. To change the plane of polarization of the wave C. To change the physical direction of propagation D. So low received power does no damage to the powerful transmitter output