HYDRONIC HEATING AND COOLING
PRETEST/POSTTEST
T/F
Forced-air-systems-cost-less-than-hydronic-systems-to-operate-and-maintain-because-of-
the-durability-and-long-life-of-the-equipment---ans-✔✔False
T/F
Far-less-water-than-air-is-needed-to-distribute-the-same-amount-of-heat,-meaning-that-
hydronic-water-distribution-can-use-piping-that-is-much-smaller-than-the-equivalent-air-
ductwork.---ans-✔✔True
T/F
For-practical-purposes,-enthalpy-may-be-taken-as-the-sum-of-sensible-heat-and-latent-
heat.---ans-✔✔True
T/F
Heat-transfer-is-the-flow-of-heat-from-one-object-or-substance-to-another,-and-it-occurs-
because-of-a-difference-in-pressure.---ans-✔✔False
T/F
Single-wall-heat-exchangers-are-less-efficient-than-double-wall-heat-exchangers-of-equal-
size.---ans-✔✔False
T/F
The-compressor-pumps-the-vaporized-refrigerant-away-from-the-evaporator-and-
discharges-it-at-a-higher-pressure-and-temperature-into-the-condenser.---ans-✔✔True
T/F
A-dry-cooling-tower-is-a-cooling-tower-with-open-water-loops,-allowing-direct-contact-
between-circulating-water-and-outside-air.---ans-✔✔False
T/F
Rotary-pumps-discharge-fluids-in-an-erratic,-pulsating-flow.---ans-✔✔False
T/F
The-two-most-commonly-used-centrifugal-pump-sealing-methods-are-the-stuffing-box-seal-
and-the-mechanical-seal.---ans-✔✔True
, T/F
There-are-four-basic-classifications-of-pumps.---ans-✔✔False
T/F
In-air-control-management-systems,-manual-air-vents-are-recommended-to-be-installed-at-
terminal-units-and-high-piping-points.---ans-✔✔True
T/F
All-piping-expands-when-cooled-and-contracts-when-heated.---ans-✔✔False
T/F
A-lift-valve-is-a-hydronic-piping-system-monitoring-device-that-is-equipped-with-an-integral-
check-valve-designed-to-minimize-system-fluid-loss-when-setting-up-to-monitor-pumps,-
heat-exchangers,-valves,-or-other-devices-handling-hot-or-cold-HTF.---ans-✔✔False
T/F
In-a-single-main-system,-if-proper-air-control-equipment-is-installed-at-the-heat-source,-
further-venting-should-not-be-necessary---ans-✔✔True
T/F
A-single-loop-system-can-serve-three-circuits.---ans-✔✔False
T/F
There-are-two-types-of-convection-units,-natural-convection-units,-which-depend-upon-
natural-gravity-to-circulate-the-air,-and-forced-convection-units,-which-utilize-fans-or-
blowers-to-move-air-across-the-unit's-element.---ans-✔✔True
T/F
In-most-cases,-the-inlet-to-a-heating-coil-is-on-the-top-of-the-coil,-and-the-outlet-is-at-the-
bottom.---ans-✔✔False
T/F
The-term-"radiant-panel"-comes-from-the-type-of-heat-transfer-a-radiant-panel-system-
utilizes.---ans-✔✔True
T/F
A-balancing-valve-is-provided-at-each-circuit-in-a-radiant-system,-or-for-each-area-where-
the-flow-of-HTF-must-be-controlled,-in-order-to-provide-equal-distribution-of-heat-transfer-
to-each-zone.---ans-✔✔True
T/F
Since-airflow-through-large-ducts-usually-has-uniform-temperatures-even-within-the-duct-
cross-section,-small-temperature-sensors-mounted-in-one-spot-are-always-accurate.---
ans-✔✔False
PRETEST/POSTTEST
T/F
Forced-air-systems-cost-less-than-hydronic-systems-to-operate-and-maintain-because-of-
the-durability-and-long-life-of-the-equipment---ans-✔✔False
T/F
Far-less-water-than-air-is-needed-to-distribute-the-same-amount-of-heat,-meaning-that-
hydronic-water-distribution-can-use-piping-that-is-much-smaller-than-the-equivalent-air-
ductwork.---ans-✔✔True
T/F
For-practical-purposes,-enthalpy-may-be-taken-as-the-sum-of-sensible-heat-and-latent-
heat.---ans-✔✔True
T/F
Heat-transfer-is-the-flow-of-heat-from-one-object-or-substance-to-another,-and-it-occurs-
because-of-a-difference-in-pressure.---ans-✔✔False
T/F
Single-wall-heat-exchangers-are-less-efficient-than-double-wall-heat-exchangers-of-equal-
size.---ans-✔✔False
T/F
The-compressor-pumps-the-vaporized-refrigerant-away-from-the-evaporator-and-
discharges-it-at-a-higher-pressure-and-temperature-into-the-condenser.---ans-✔✔True
T/F
A-dry-cooling-tower-is-a-cooling-tower-with-open-water-loops,-allowing-direct-contact-
between-circulating-water-and-outside-air.---ans-✔✔False
T/F
Rotary-pumps-discharge-fluids-in-an-erratic,-pulsating-flow.---ans-✔✔False
T/F
The-two-most-commonly-used-centrifugal-pump-sealing-methods-are-the-stuffing-box-seal-
and-the-mechanical-seal.---ans-✔✔True
, T/F
There-are-four-basic-classifications-of-pumps.---ans-✔✔False
T/F
In-air-control-management-systems,-manual-air-vents-are-recommended-to-be-installed-at-
terminal-units-and-high-piping-points.---ans-✔✔True
T/F
All-piping-expands-when-cooled-and-contracts-when-heated.---ans-✔✔False
T/F
A-lift-valve-is-a-hydronic-piping-system-monitoring-device-that-is-equipped-with-an-integral-
check-valve-designed-to-minimize-system-fluid-loss-when-setting-up-to-monitor-pumps,-
heat-exchangers,-valves,-or-other-devices-handling-hot-or-cold-HTF.---ans-✔✔False
T/F
In-a-single-main-system,-if-proper-air-control-equipment-is-installed-at-the-heat-source,-
further-venting-should-not-be-necessary---ans-✔✔True
T/F
A-single-loop-system-can-serve-three-circuits.---ans-✔✔False
T/F
There-are-two-types-of-convection-units,-natural-convection-units,-which-depend-upon-
natural-gravity-to-circulate-the-air,-and-forced-convection-units,-which-utilize-fans-or-
blowers-to-move-air-across-the-unit's-element.---ans-✔✔True
T/F
In-most-cases,-the-inlet-to-a-heating-coil-is-on-the-top-of-the-coil,-and-the-outlet-is-at-the-
bottom.---ans-✔✔False
T/F
The-term-"radiant-panel"-comes-from-the-type-of-heat-transfer-a-radiant-panel-system-
utilizes.---ans-✔✔True
T/F
A-balancing-valve-is-provided-at-each-circuit-in-a-radiant-system,-or-for-each-area-where-
the-flow-of-HTF-must-be-controlled,-in-order-to-provide-equal-distribution-of-heat-transfer-
to-each-zone.---ans-✔✔True
T/F
Since-airflow-through-large-ducts-usually-has-uniform-temperatures-even-within-the-duct-
cross-section,-small-temperature-sensors-mounted-in-one-spot-are-always-accurate.---
ans-✔✔False
