4Th Class Power Engineering Chapter 112

Front 1

The blow off valve in a storage heater is used to:

1) Shut off the flow of gas if the flame and pilot light are extinguished

2) Monitor unsafe temperatures

3) Remove sediment carried to the heater through the water line

4) Release steam should the heater malfunction to avoid flashing of steam in the fixtures

5) Eliminate pressure build up in the heater

Back 1

Remove sediment carried to the heater through the water line

Front 2

A plumbing drain trap should be located within _____ of the fixture:

1) 750 mm

2) 610 mm

3) 350 mm

4) 590 mm

5) 460 mm

Back 2

610 mm

Front 3

The pressure maintained in a plumbing vent stack is:

1) Slightly above atmospheric

2) Slightly below atmospheric

3) Atmospheric

4) Significantly above atmospheric

5) Significantly below atmospheric

Back 3

Significantly below atmospheric

Front 4

Some water closets are provided with flush tanks while others are equipped with:

1) Flood valves

2) Flushometers

3) Ball cocks

4) Float valves

5) Drain valves

Back 4

Flushometers

Front 5

A deep seal plumbing trap has a water seal depth of:

1) 10 cm

2) 20 cm

3) 5 cm

4) 15 cm

Back 5

10 cm

Front 6

A common seal plumbing trap has a water seal depth of:

1) 20 cm

2) 15 cm

3) 25 cm

4) 10 cm

5) 5 cm

Back 6

5 cm