4th Class Part A Power Engineering
- Instrumentation final review Exam
A
R
U
LA
C
O
D
,Flow is proportional to:
Select one:
a. the square root extractor
b. pressure differential
c. the square root of the temperature differential
A
d. the square root of the pressure differential
e. a constant head - ANS d
R
A capillary is the name given to:
Select one:
a. the bulb holding the fluid of a filled thermometer
b. the line attached to the measuring junction of a thermocouple
U
c. a tube with a small uniform bore
d. the key part of a thermistor
e. a unit used only in refrigeration - ANS c
LA
Thermo wells are:
Select one:
a. Used in pipes only
b. Not used with thermocouples
C
c. Used to protect the bulb from erosion, corrosion and impact
d. Used in conjunction with a capillary tube
e. Made of soft material - ANS c
O
Which flowmeter has a ball-like structure with a small shaft in the centre?
Select one:
a. nutating disc
D
b. rotary meter
c. magnetic flowmeter
d. target flowmeter
e. rotameter - ANS a
Flow inside a pipeline can differ considerably. Normal flow is referred to as:
Select one:
a. transitional
b. laminar
c. segmental
,d. lunar
e. turbulent - ANS b
What is not a characteristic of a radiation detector?
Select one:
a. radiation source is usually uranium
b. high in cost with special handling requirements
c. needs a lead-lined stainless steel container
d. special precautions must be taken
e. radiation received from the source is an indication of the level - ANS a
A
Another name for a variable area meter is:
Select one:
a. nutating disc
R
b. pressurized bubbler
c. atmospheric bubbler
d. target flowmeter
e. rotameter - ANS e
U
On a thermocouple the joined end is called the:
Select one:
LA
a. proportional connection
b. none of the answers
c. measuring junction
d. thermowell
e. reference junction - ANS c
C
To get more rotation of a pointer, the bimetal strip would be made ----------.
Select one:
a. shorter
b. in the form of a helix
O
c. longer
d. thicker
e. thinner - ANS b
D
Which flowmeter gives the least pressure loss?
Select one:
a. Pitot tube
b. orifice plate
c. magnetic
d. nutating disc
e. target - ANS c
What can be used as a level indicator?
, Select one:
a. differential pressure transmitter
b. all of the answers
c. capacitance probe
d. diaphragm box
e. bubbler - ANS b
A steam gauge which would be used on a portable boiler where external vibrations are common
would be this type.
Select one:
a. double bourdon
A
b. spiral
c. bellows
d. spiral, spring-mounted
R
e. helix - ANS a
Bimetal thermometers depend on the principle that:
Select one:
U
a. oval-shaped objects will expand into a circular form
b. dissimilar metals expand at different rates when heated
c. similar metals contract at the same rate
LA
d. dissimilar metals can produce more power to move a needle
e. none of the answers - ANS b
What is the most undesirable feature of an orifice plate?
Select one:
a. high permanent pressure loss
C
b. high cost of installation
c. long length of straight pipe needed
d. high-corrosion rate
e. special flanges needed - ANS a
O
A pressure-sensing instrument which is used for very low pressures up to + or - 250 mm of
water is a:
D
Select one:
a. double helix gauge
b. double tube bourdon gauge
c. absolute pressure gauge
d. barometer
e. diaphragm - ANS e
A radiation pyrometer senses:
Select one:
a. color of a hot object
- Instrumentation final review Exam
A
R
U
LA
C
O
D
,Flow is proportional to:
Select one:
a. the square root extractor
b. pressure differential
c. the square root of the temperature differential
A
d. the square root of the pressure differential
e. a constant head - ANS d
R
A capillary is the name given to:
Select one:
a. the bulb holding the fluid of a filled thermometer
b. the line attached to the measuring junction of a thermocouple
U
c. a tube with a small uniform bore
d. the key part of a thermistor
e. a unit used only in refrigeration - ANS c
LA
Thermo wells are:
Select one:
a. Used in pipes only
b. Not used with thermocouples
C
c. Used to protect the bulb from erosion, corrosion and impact
d. Used in conjunction with a capillary tube
e. Made of soft material - ANS c
O
Which flowmeter has a ball-like structure with a small shaft in the centre?
Select one:
a. nutating disc
D
b. rotary meter
c. magnetic flowmeter
d. target flowmeter
e. rotameter - ANS a
Flow inside a pipeline can differ considerably. Normal flow is referred to as:
Select one:
a. transitional
b. laminar
c. segmental
,d. lunar
e. turbulent - ANS b
What is not a characteristic of a radiation detector?
Select one:
a. radiation source is usually uranium
b. high in cost with special handling requirements
c. needs a lead-lined stainless steel container
d. special precautions must be taken
e. radiation received from the source is an indication of the level - ANS a
A
Another name for a variable area meter is:
Select one:
a. nutating disc
R
b. pressurized bubbler
c. atmospheric bubbler
d. target flowmeter
e. rotameter - ANS e
U
On a thermocouple the joined end is called the:
Select one:
LA
a. proportional connection
b. none of the answers
c. measuring junction
d. thermowell
e. reference junction - ANS c
C
To get more rotation of a pointer, the bimetal strip would be made ----------.
Select one:
a. shorter
b. in the form of a helix
O
c. longer
d. thicker
e. thinner - ANS b
D
Which flowmeter gives the least pressure loss?
Select one:
a. Pitot tube
b. orifice plate
c. magnetic
d. nutating disc
e. target - ANS c
What can be used as a level indicator?
, Select one:
a. differential pressure transmitter
b. all of the answers
c. capacitance probe
d. diaphragm box
e. bubbler - ANS b
A steam gauge which would be used on a portable boiler where external vibrations are common
would be this type.
Select one:
a. double bourdon
A
b. spiral
c. bellows
d. spiral, spring-mounted
R
e. helix - ANS a
Bimetal thermometers depend on the principle that:
Select one:
U
a. oval-shaped objects will expand into a circular form
b. dissimilar metals expand at different rates when heated
c. similar metals contract at the same rate
LA
d. dissimilar metals can produce more power to move a needle
e. none of the answers - ANS b
What is the most undesirable feature of an orifice plate?
Select one:
a. high permanent pressure loss
C
b. high cost of installation
c. long length of straight pipe needed
d. high-corrosion rate
e. special flanges needed - ANS a
O
A pressure-sensing instrument which is used for very low pressures up to + or - 250 mm of
water is a:
D
Select one:
a. double helix gauge
b. double tube bourdon gauge
c. absolute pressure gauge
d. barometer
e. diaphragm - ANS e
A radiation pyrometer senses:
Select one:
a. color of a hot object
