11. ACR-104 UNIT 23 PRACTICE TEST

The two housings used for reciprocating compressors are ___________.

• hermetic and open

• rotary and open

• rotary and semi-hermetic

• centrifugal and screw

Open-drive compressors are manufactured in two styles, ____________.

• direct drive and rigid drive

• belt drive and automatic drive

• belt drive and direct drive

• pneumatic and electronic

A _________ in a reciprocating compressor transmits the circular motion of the rods into a back-and-forth motion for the pistons.

• reed valves

• muffler

• valve plate

• crankshaft

Connecting rods connect the crankshaft to the valve plate.

• True

• False

The part of the cylinder assembly that is exposed to high-pressure gas during compression is the _________.

• connecting rods

• valve plate

• piston

• crankshaft

The ________, located between the head of the compressor and the top of the cylinder wall, holds the suction and discharge flapper valves.

• valve plate

• muffler

• piston

• crankshaft

A compressor that has few moving parts, operates quieter than other models and at a higher efficiency is a ____________ compressor.

• scroll

• screw

• rotary

• reciprocating

Scroll compressors can use radial movement, which allow the compressor to handle small amounts of liquid.

• True

• False

In a scroll compressor, there are no volumetric losses through gas re-expansion as with piston-type compressors.

• True

• False

_________ compressors are refrigeration compressors that are available with capacity modulation from 10% to 100%.

• Open-drive

• Discus

• Rotary

• Reciprocating