Power engineer class 4 part B Exam 2025/2026 Actual
Complete Real Exam Questions And Verified Answers
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When the pressure at any point inside a pump drops below the
vapour pressure corresponding to the temperature of the liquid,
the liquid will vaporize and form vapour bubbles: - ANSWER-
cavitation
Head and pressure are the same ___ - ANSWER-term
Wherever PD pumps are installed there should always be a
______ ______ in
the discharge line before any valving - ANSWER-relief valve (
to protect pump
and piping from
overpressure)
check the position of _____ & ______ valves before
starting a pump -
ANSWER-suction and
discharge
ensure pump is primed with ____ before starting. and insure the
suction valve is
,____ - ANSWER-liquid,
open
The most accurate method for checking flanges for
misalignment is using a : -
ANSWER-dial
indicator
what are causes of shaft misalignment: - ANSWER--
Shaft flexing
- thermal
expansion
- bearing
wear
mechanical pump seals require less _____ and can be used
for: - ANSWER-
maintenance, high pressure
service
packing material is placed in a stuffing box around the
pump shaft to : -
ANSWER-reduce
leakage
a centrifugal pump uses a lantern ring to prevent: -
ANSWER-air leakage into
the
casing
,rotary pumps and other PD ( positive displacement) pumps
should be equipped
with: - ANSWER-relief
valves
Hot water heating system circulators should be very ____
in operation -
ANSWER-
quiet
Rotary type pumps use _____ , _____ or ______ - ANSWER-gear
teeth, vanes
lobes or sliding vanes.. to move the liquid
being pumped
Pumps that continuously move the fluid in the cooling
system are called: -
ANSWER-circulating
pumps
Total dynamic head is the sum of the : - ANSWER-total
static head and
dynamic
head
Dynamic head is the head required to overcome ____ and
develop _____ -
ANSWER-friction,
velocity
, Total static head is the: - ANSWER-net vertical distance from
the surface of the
supply to the surface of the liquid in the
discharge tank.
efficiency ____ when the clearances of a wear ring ___ -
ANSWER-decreases,
increase
The packing bears against the walls of the stuffing box and
against the ___ to
reduce leakage along the shaft -
ANSWER-shaft
The packing is not meant to stop ____ but control it. some
weepage will
lubricate and cool - ANSWER-
leakage
Over tightening the packing will destroy the packing and
____ the shaft -
ANSWER-
damage
The lantern ring is also known as - ANSWER-the seal cage
________ provide a seal to prevent air from entering the pump.
Used for high
Complete Real Exam Questions And Verified Answers
| 100% Correct Answers Graded A+ Guaranteed Success!!
| Newest Exam | Just Released!!
When the pressure at any point inside a pump drops below the
vapour pressure corresponding to the temperature of the liquid,
the liquid will vaporize and form vapour bubbles: - ANSWER-
cavitation
Head and pressure are the same ___ - ANSWER-term
Wherever PD pumps are installed there should always be a
______ ______ in
the discharge line before any valving - ANSWER-relief valve (
to protect pump
and piping from
overpressure)
check the position of _____ & ______ valves before
starting a pump -
ANSWER-suction and
discharge
ensure pump is primed with ____ before starting. and insure the
suction valve is
,____ - ANSWER-liquid,
open
The most accurate method for checking flanges for
misalignment is using a : -
ANSWER-dial
indicator
what are causes of shaft misalignment: - ANSWER--
Shaft flexing
- thermal
expansion
- bearing
wear
mechanical pump seals require less _____ and can be used
for: - ANSWER-
maintenance, high pressure
service
packing material is placed in a stuffing box around the
pump shaft to : -
ANSWER-reduce
leakage
a centrifugal pump uses a lantern ring to prevent: -
ANSWER-air leakage into
the
casing
,rotary pumps and other PD ( positive displacement) pumps
should be equipped
with: - ANSWER-relief
valves
Hot water heating system circulators should be very ____
in operation -
ANSWER-
quiet
Rotary type pumps use _____ , _____ or ______ - ANSWER-gear
teeth, vanes
lobes or sliding vanes.. to move the liquid
being pumped
Pumps that continuously move the fluid in the cooling
system are called: -
ANSWER-circulating
pumps
Total dynamic head is the sum of the : - ANSWER-total
static head and
dynamic
head
Dynamic head is the head required to overcome ____ and
develop _____ -
ANSWER-friction,
velocity
, Total static head is the: - ANSWER-net vertical distance from
the surface of the
supply to the surface of the liquid in the
discharge tank.
efficiency ____ when the clearances of a wear ring ___ -
ANSWER-decreases,
increase
The packing bears against the walls of the stuffing box and
against the ___ to
reduce leakage along the shaft -
ANSWER-shaft
The packing is not meant to stop ____ but control it. some
weepage will
lubricate and cool - ANSWER-
leakage
Over tightening the packing will destroy the packing and
____ the shaft -
ANSWER-
damage
The lantern ring is also known as - ANSWER-the seal cage
________ provide a seal to prevent air from entering the pump.
Used for high
