1-47. What temperature-regulating valve is used when
seawater is the primary cooling medium in the heat
1-48. In the three-way temperature-regulating valve, dis-
tilled water is proportioned between what total
number of paths?
1-49. Two-way temperature-regulating valves are normally
installed at what location on the heat exchanger?
1. In the distilled-water supply
2. In the chilled-water supply
3. On the cooling water side
4. On the seawater side
1-50. Both the three-way and two-way temperature-
regulating valves have a manual override feature.
1-51. The orifice plate is found primarily in which of the
following cooling systems?
1. Chilled water
2. Coolant water
1-52. When used with the chilled-water system, the
constant-flow regulator is installed at what location
from the heat exchanger?
3. In parallel
4. In series
1-53. The amount of water that the flow regulator will pass
is usually stamped whereon the regulator?
1-54. A flow regulator or a pressure regulator can NOT be
1-55. A low-flow switch to monitor the overall coolant flow
is normally found in which of the following cooling
3. Air conditioning
1-56. The flow of water through an orifice causes which of
the following results?
1. The pressure stays the same
2. The pressure increases
3. The pressure fluctuates
4. The pressure drops
1-57. In the venturi flowmeter, the flow rate is proportional
to the difference between the
1. two taps
2. both sides
3. top and bottom
4. fresh and saltwater sides
1-58. What is the major advantage of a rotameter over a
1. Size of equipment
2. Expense of maintenance
3. Complexity of operations
4. Visibility of coolant