A stair with treads cantilevered from a central column is a(n)
A) L-shaped stair.
B) U-shaped stair.
C) circular stair.
D) helical stair.
E) spiral stair.
E) spiral stair.
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What happens when the compressor discharge pressure falls below the pressure in the discharge line?
A. Forward flow stops and gas from the discharge line flows backward. B. Forward flow increases and overcomes the line pressure. C. Upstream line pressure drops as well as the process temperature. D. The compressor will make loud noises.
What principle do boilers use to assist fluid circulation?
A) Kinetic principle B) Differential density C) Mechanic principle D) Hydro effect
When installing ____ hinges, first screw the hinges on the door.
a.dovetail b.concealed c.continuous d.friction
The normal voltage on the VPWM J1850 bus is ____ volts when it is at rest.
A. zero B. 2.5 C. 5 D. 7.5