Technician A says that any vehicle producing excessive NOx emission can be identified by performing an opacity test on its exhaust smoke. Technician B says that PM in the exhaust gas is always identified in opacity testing. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: B
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Which of the following would not be considered normal during the heating mode of a heat pump?
a. Hot, high-pressure refrigerant flows through the indoor coil. b. The outdoor check valve is pushed open. c. The refrigerant flows through the outdoor TXV. d. The reversing valve is de-energized.
One factor that can contribute to the development of cement dermatitis is _____.
a. poor hydration b. wearing rubber gloves c. excessive sweating d. using lanolin-based soaps
Typical row spacing of corn and soybean have increased since the 1950s
Indicate whether the statement is true or false
Compared to the installation of a gas or oil furnace, an electric furnace installation is:
A) About the same complexity and difficulty. B) Less complex and easier. C) More complex, but generally easier. D) Less complex, but generally more difficult.