4th Class Power Engineering Unit A7 2026 – Intro Fluid Handling,
Rated A+, Guaranteed Pass
The material designation of a valve:
Select one:
a. gives where the material is used
b. tells what material makes up the valve
c. gives the temperature to which the valve can be subjected
d. tells what the material is suited for - CORRECT ANSWER✔✔b
Pipe hangers are installed at three metre intervals to:
Select one:
a. align the pipe, keep the pipe out of the way of foot traffic
b. provide a proper drainage slope, align the pipe, allow free movement for pipe
expansion
c. provide a proper drainage slope, prevent leaks
d. keep the pipe out of the way of foot traffic - CORRECT ANSWER✔✔b
The maximum temperature, which a non-special alloy steel valve can be used for
is:
Select one:
a. 280 0C
b. 425 0C
,c. 650 0C
d. 1,000 0C - CORRECT ANSWER✔✔c
Before admitting any steam to a steam piping system it is imperative to first:
Select one:
a. warm the line up properly
b. positively ensure that no water or condensate exists in the piping
c. crack open the steam valve
d. ensure the steam pressure is at maximum value allowed without the boiler
safety valve opening - CORRECT ANSWER✔✔b
A basic ball valve must be turned this far to go from a fully closed to a fully open
position:
Select one:
a. 1 full turn
b. 3⁄4 of a turn
c. 1⁄2 of a turn
d. 1⁄4 of a turn - CORRECT ANSWER✔✔d
Welding together pipe size of two inch nominal size and smaller is usually done
by:
Select one:
a. the oxygen-acetylene method
b. the socket welded method
c. the butt welded method
, d. non-pressure welders - CORRECT ANSWER✔✔b
You would use this type of valve where there is very little room between the
handle and a fixed surface:
Select one:
a. a non-rising stem valve
b. a check valve
c. a ball valve
d. a safety valve - CORRECT ANSWER✔✔a
Improper drainage of steam lines could:
Select one:
a. result in excessive steam pressures
b. cause low pressure in the lines
c. eventually result in water hammer
d. give excessive weight to the pipe - CORRECT ANSWER✔✔c
The purpose of the stop and check valve in the boiler outlet on a boiler which is
connected to a common main:
Select one:
a. Allows for isolation of boilers without closing stop valve
b. Prevents backflow of steam from header into a boiler at lower pressure
c. Check valve can prevent steam from flowing into main header
d. Must be installed on every boiler - CORRECT ANSWER✔✔b
Rated A+, Guaranteed Pass
The material designation of a valve:
Select one:
a. gives where the material is used
b. tells what material makes up the valve
c. gives the temperature to which the valve can be subjected
d. tells what the material is suited for - CORRECT ANSWER✔✔b
Pipe hangers are installed at three metre intervals to:
Select one:
a. align the pipe, keep the pipe out of the way of foot traffic
b. provide a proper drainage slope, align the pipe, allow free movement for pipe
expansion
c. provide a proper drainage slope, prevent leaks
d. keep the pipe out of the way of foot traffic - CORRECT ANSWER✔✔b
The maximum temperature, which a non-special alloy steel valve can be used for
is:
Select one:
a. 280 0C
b. 425 0C
,c. 650 0C
d. 1,000 0C - CORRECT ANSWER✔✔c
Before admitting any steam to a steam piping system it is imperative to first:
Select one:
a. warm the line up properly
b. positively ensure that no water or condensate exists in the piping
c. crack open the steam valve
d. ensure the steam pressure is at maximum value allowed without the boiler
safety valve opening - CORRECT ANSWER✔✔b
A basic ball valve must be turned this far to go from a fully closed to a fully open
position:
Select one:
a. 1 full turn
b. 3⁄4 of a turn
c. 1⁄2 of a turn
d. 1⁄4 of a turn - CORRECT ANSWER✔✔d
Welding together pipe size of two inch nominal size and smaller is usually done
by:
Select one:
a. the oxygen-acetylene method
b. the socket welded method
c. the butt welded method
, d. non-pressure welders - CORRECT ANSWER✔✔b
You would use this type of valve where there is very little room between the
handle and a fixed surface:
Select one:
a. a non-rising stem valve
b. a check valve
c. a ball valve
d. a safety valve - CORRECT ANSWER✔✔a
Improper drainage of steam lines could:
Select one:
a. result in excessive steam pressures
b. cause low pressure in the lines
c. eventually result in water hammer
d. give excessive weight to the pipe - CORRECT ANSWER✔✔c
The purpose of the stop and check valve in the boiler outlet on a boiler which is
connected to a common main:
Select one:
a. Allows for isolation of boilers without closing stop valve
b. Prevents backflow of steam from header into a boiler at lower pressure
c. Check valve can prevent steam from flowing into main header
d. Must be installed on every boiler - CORRECT ANSWER✔✔b
