Questions 1-80

1.Temperature is

• a form of energy

• an indication of the heat energy in a body

• the amount of heat contained by a body

• the acting of a force pressing against a surface

2.A Steam Boiler is

• a closed vessel, partially filled with water in which the water is evaporated into steam under pressure by the application of heat

• a closed vessel, completely filled with water, in which the water is evaporated into steam under pressure by the application of heat.

• a closed vessel that operates at a temperature not higher than 250°

• a closed vessel that operates at a temperature higher than 250°

3.A low pressure hot water boiler operates at a

• pressure lower than 15 psi

• pressure higher than 160 psi

• temperature higher than 250°F

• pressure not higher than 160 psi and/or temperatures not higher than 250°F

4.The lowest permissible water level in a boiler is

• the actual level of water in the boiler during operation

• the lowest water level at which the boiler can be operated without damaging or overheating any part of the boiler

• the lowest visible point of the gauge glass

• 1 inch above the bottom gauge glass packing nut

5.A “Safety Valve” on a boiler

• shuts down the burner when boiler pressure gets too high

• opens up to let more water into the boiler if the boiler pressure gets to high

• drains some water out of the boiler if the pressure goes too high

• prevents the pressure within the boiler from exceeding safe limits

6.A “Low Water Cut Off” on a boiler

• will shut off the burner if the water level in the boiler becomes dangerously low

• will allow more water to be pumped into the boiler

• will drain water out of the boiler if the level goes too high

• will shut off the burner if boiler pressure goes too high

7.Heat is

• a form of energy

• an indication of how hot a body is

• transferred from a cold object to a hot object

• the buildup of pressure in a closed vessel

8.A Blow Off Valve is used to

• relieve excess pressure in a boiler

• blow out sludge and sediment from a boiler

• drain the water column on a boiler

• add water to a boiler

9.A Boiler is most efficient

• when it operates at full load continuously

• when it operates at partial load

• when it is first started up

• after it has been running for 12 hours

10.On Low Pressure Steam Boilers, the “Try Lever Test” should not be used until the pressure is up to at least

• 2 psi

• 5 psi

• 7 psi

• 10 psi

Answer explanation

This test determines whether or not the valve is free to operate.