Worksheetsunit 8
Total questions: 77
Worksheet time: 19hrs 15mins
What is the function of the squirrel cage motor in MOV is?
Allow mechanical operation of the valve
Set the actuator motor drive limits
Mechanical drive to open and close the valve
to choose LOCAL, REMOTE, LOCAL & REMOTE or OFF
What is the part in MOV’s that provides the mechanical drive to open and close valve?
Gearbox
squirrel cage Motor
Limit switch
Control switch
What is the function of the gearbox in MOV’s is?
Allow mechanical operation of the valve
Set the actuator motor drive limits
Mechanical drive to open and close the valve
to choose LOCAL, REMOTE, LOCAL & REMOTE or OFF
What is the part in MOV’s allows mechanical operation of the valve?
Gearbox
Motor
Limit switch
Control switch
Why the gearbox filled with oil?
Prevent over temperature damage
To reduce friction
Let the motor gain full speed before it engages the load
Disengage from hand drive
What are the O-rings needs for Movs?
Disengages from hand drive
Allows the valve to operate at a suitable speed
To prevent oil from leaking
Provides two direction control
What is the part in MOV’s that prevent the oil from leaking?
Worm drive
Oil seals and O rings
Worm wheel
Center column
What is the part in the MOVs adjust and set the torque setting cams correctly?
Clutch lever
Torque switch shaft
Worm drive
Limit switch
Refer the figure 1, what is the function of part 1?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor to the valve..
disconnect the output shaft from motor driven worm gearwheel
Refer the figure 1, what is the function of part 2?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor.
disconnect the output shaft from motor driven worm gearwheel
Refer the figure 1, what is the function of part 3?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor to the valve.
disconnect the output shaft from motor driven worm gearwheel
Refer the figure 1, what the function of part 4?
Allow mechanical operation of the valve
Drive is transmitted from the motor to the valve stem
disconnect the output shaft from the motor-driven worm gearwheel
Adjustment to the shaft to change its extension
Refer the figure 1, what the function of part 5?
Allow mechanical operation of the valve
Set the actuator motor drive limits
Mechanical drive to open and close the valve
to choose LOCAL, REMOTE, LOCAL & REMOTE or OFF
What is the function of Worm drive of Movs?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Transmit Drive the motor to the valve.
disconnect the output shaft from motor driven worm gearwheel
What is the function of torque-limit switching unit faceplate?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor to the valve.
disconnect the output shaft from motor driven worm gearwheel
Why adjusting the limit switches lets you pre-set?
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor to the valve
Desired open or close valve stem travel
What is the part in the MOVs Pre-set open or close valve stem travel?
Mechanical indicator.
Mechanical switching
limit switch
Gear box
Refer to figure 2 shown; what is the part # 1?
Mechanical indicator.
Mechanical switching
Switches
Worm drive
Refer to figure 2 shown; what is the part # 2?
Mechanical indicator.
Mechanical switching
Switches /Limit
Worm drive
Refer to figure 2 shown; what is the part # 3?
Mechanical indicator.
Mechanical switching
Switches
Worm drive
When setting the limit switch, you can pre-set
Allow mechanical operation of the valve.
Adjust and set the torque setting cams correctly.
Drive the transmitted from the motor to the valve
Desired open or close valve stem travel
What is the function of limit switching?
Allow mechanical operation of the valve.
Shows the valve position open or closed
Drive the transmitted from the motor to the valve.
Pre-set open or close valve stem travel
Refer the figure shown, what the function of part of Move?
Allow mechanical operation of the valve
Drive is transmitted from the motor to the valve stem
disconnect the output shaft from the motor-driven worm gearwheel
Shows the valve position open or closed
Refer the figure 3 shown; what is the function of part A?
Shows the valve position
Disconnects a contactor at the preset torque limit
For remote indication and interlock
Adjustment to the shaft to change its extension
Refer the figure 3 shown; what is the function of part B?
Shows the valve position
Disconnects a contactor at the preset torque limit
For remote indication and interlock
Adjustment to the shaft to change its extension
What is the function of auxiliary limit switches?
Automatically disengage from hand drive
Allows the valve to be opened or closed
remote indication and interlock
Disconnects a contactor at the preset torque limit
What is the function of torque /limit switch?
For remote indication and interlock
Disconnects a contactor at the preset torque limit
Automatically disengage from hand drive
Allows the valve to be opened or closed
Refer the figure 5, what is the current setting of Cams?
Open torque and Close limit
Open torque and Close torque
Open limit and Close limit
Open limit and Close torque
Which selector cam selects the actuator control for CLOSING on limit or torque?
Cam A
Cam B
Cam C
Cam D
Which selector cam controls the CLOSING torque?
Cam A
Cam B
Cam C
Cam D
Which selector cam selects the actuator control for OPENING on limit or torque?
Cam A
Cam B
Cam C
Cam D
Which selector cam controls the OPENING torque?
Cam A
Cam B
Cam C
Cam D
Refer the figure 4 shown. What is the part A?
Terminal board
Operating switch
Selector clamp
Selector handle
Refer the figure 4. What is the part B?
Terminal board
Operating switch
Selector clamp
Selector handle
Refer the figure 4. What is the part C?
Terminal board
Operating switch
Selector clamp
Selector handle
Refer the figure 4, what is the function of selector handle?
Choose LOCAL, REMOTE, LOCAL & REMOTE or OFF position
Stops the motor by a simple push of the hand
Locked in OFF position by use of padlock
Main electrical connection is located
Refer the figure 4 ,what is part use to choose the local, remote local and remote or off position?
Terminal board
Operating switch
Selector clamp
Selector handle
Refer the figure 4, what is the function of operating switch?
Choose LOCAL, REMOTE, LOCAL & REMOTE or OFF position
Stops the motor by a simple push of the hand
Locked in OFF position by use of padlock
allows the valve to be opened or closed
The operating switch allows the valve to be opened ____________
By moving clockwise
By moving anti-clockwise
By moving to the left
By moving to the right/left
The operating switch allows the valve to be closed ____________
clockwise
anti-clockwise
Push hand
Pull hand
How the operating switch Stop the motor?
clockwise
anti-clockwise
Push hand
Pull hand
Refer the figure Show, What happen if operating switch moving clockwise?
Shutdown the motor
The motor will run to open the valve
The motor will run to closed the valve
nothing happens
Refer the figure Show ,What happen if operating switch moving anti-clockwise?
Shutdown the motor
The motor will run to open the valve
The motor will run to closed the valve
nothing happens
Refer the figure 4, what is the function of Selector clamp?
Choose LOCAL, REMOTE, LOCAL & REMOTE or OFF position
Stops the motor by a simple push of the hand
Locked in OFF position by use of padlock
allows the valve to be opened or closed
What is the function of Code card of Movs?
Manufacturer’s manual
identifies the terminals to aid connection
identifies the parts of Movs
Vendor’s manual
The _______ identifies the terminals that you will use the connect the control circuit
Manufacturer’s manual
code card
Nameplate
Vendor’s manual
In Test Figure 6, which contacts acts as the electrical interlock in the circuit?
CC2 and OC2
CT/LS and OT/LS
CR1 and OR1
OC1 and CC1
In Test Figure 6, the valve is close and is set at LOCAL. When the local open push button is pushed, the valve fails to open. The reading of the voltmeter at terminal 44 and between OT/LS & CC1 is 120 volt. Where and what type of fault exist?
CC2 – open circuit
OT/LS – open circuit
CC1 – open circuit
OC coil – open circuit
In Test Figure 6, at normal operation what will be the expected reading at CC terminals A1 & A2 if the valve is moving close?
higher than control voltage
lower than control voltage
equal to control voltage
zero voltage
In Test Figure 6, the valve is open. The valve does not work in either LOCAL or REMOTE. The voltage form terminal 5 to 4 (ground) is 120 volt. The voltage from Local Stop to ground is zero. The motor is very hot. What is the problem?
FS3 is open
FS1 and FS2 is open
TH trip
transformer is open
In Test Figure 6, the valve is close. The selector is at REMOTE. The valve did not open when the open push button is pushed. Where is the fault located?
Terminal 40 – 120 v volts Terminal 39 – 120 volts
Terminal 38 – 120 v volts Terminal 44 – 0 volts
Open between terminal 44 and OT/LS
Open between terminal 38 and 44
Open between terminal CC1 and OT/LS
Open between terminal 38 and 39
In Test Figure 6, the primary voltage of the transformer is?
550 v
480 v
460 v
440 v
In Test Figure 6, where is Secondary connected of the transformer?
terminal 39 and 37
terminal 4 and 5
terminal 38 and 37
terminal 38 and 41
In Test Figure 6, the power rating of the heater is?
2 watts
20 watts
200 watts
2000 watts
In Test Figure 6, the circuit is drawn in what condition?
valve fully closed, selector switch set to local
valve fully closed, selector switch set to remote
valve fully closed, selector switch set to local and remote
valve fully open, selector switch set to remote
In Test Figure 6, if the valve is traveling, what will be the condition of OT/LS & CT/LS?
OT/LS closed, CT/LS open
OT/LS open, CT/LS closed
OT/LS open, CT/LS open
OT/LS closed, CT/LS closed
In Test Figure 6, where is CC2 connected?
terminal 39 and 37
terminal 41 and 37
terminal 38 and 37
terminal 38 and 41
In Test Figure 6, where is CR1 connected?
terminal 39 and 37
terminal 41 and 37
terminal 38 and 37
terminal 38 and 41
Refer to the Rotork MOV Figure 6, what keeps contactor CC energized when the LOCAL closed PB is pressed and then released?
CC1
OC1
OC2
CC2
Refer to the RotorK MOV Figure 6, if the valve is fully open, what prevents the valve from opening further?
OT/LS
CT/LS
OC2
CC2
Refer to the RotorK MOV Figure 6, if the valve is fully close, what prevents the valve from closing further?
OT/LS
OC2
CT/LS
CC2
Refer to the RotorK MOV figure 6, which selector switches are closed when the valve is in REMOTE position?
SS1 and SS2
SS1 and SS3
SS2 and SS4
SS2 and SS3
1. In Test Figure 6, the valve is closed and is set at LOCAL. When the local open push button is pushed, the valve fails to open. The reading of the voltmeter at terminal 42 is 120v, and at terminal 27 is 120v, and at terminal 44 is 120v. Where and what type of fault exist? Voltages reading from 4
Terminal 35 and 27 – open circuit
Terminal 42 and 44 – open circuit
Terminal 38 – short circuit
CC1 – open circuit
1. In Test Figure 6, the valve is opened and is set at LOCAL. When the local close push button is pushed, the valve fails to close. The reading of the voltmeter at terminal 27 is 120v, and at terminal 35 is 120v, and at terminal 43 is 120v, and at Al of closing coil is 0 v. Where and what type of fault exist? Voltages reading from 4
CR1 contact– open circuit
Terminal 44 and ground –open circuit
Terminal 37 – short circuit
OC1 contact – open circuit
When install and test MOVs what should be ?
De-energize the supply
lockout and hold tag procedures
energize the supply
All of these
Refer to the Rotork MOV Figure 6, what keeps contactor OC energized when the LOCAL open PB is pressed and then released?
CC1
OC1
OC2
CC2
In Test Figure 6, the valve is close. The selector is at REMOTE. The valve did not open when the open push button is pushed. Where is the fault located?
Voltages reading are:
Terminal 5 and 42 – 0 volt Terminal 4 and 38 – 0 volt
Terminal 4 and 35 – 120 volts
Open between terminal 42 and OT/LS
Open between terminal 38 and 44
Open between terminal CC1 and OT/LS
Open between terminal 35 and 38
1. In Test Figure 6, the valve is Open. The selector is at REMOTE. The valve did not Close when the close push button is pushed. Where is the fault located?
Voltages reading are:
Terminal 5 and 42 – 0 volt Terminal 4 and 37 – 0 volt
Terminal 4 and 35 – 120 volts
Open between terminal 42 and CT/LS
Open between terminal 35 and 37
Open between terminal OC1 and CT/LS
Open between terminal 35 and 42
What part of MOV lets motor gain full speed before it engages the load, and its effect is called?
Clutch lever
Worm drive
Hammer blow
Limit switch
What lets motor gain full speed before it engages the load, and its effect is called hammer blow?
Clutch lever
Worm drive
backlash
Limit switch
In Test Figure 6, which contacts use to prevent the OC from energize when the CC energize?
CT/LS
CC1
OC1
OT/LS
In Test Figure 6, which contacts use to prevent the CC from energize when the OC energize?
CT/LS
CC1
OC1
OT/LS
Refer to the RotorK MOV Figure 6, what will be trip when have over temperature?
OT/LS
FS3
OL
TH
Refer to the RotorK MOV Figure 6, The selector is at REMOTE what is the contact energize CC when push button close is pushed?
CR1
OR1
CC1
SR1
Refer to the RotorK MOV Figure 6, The selector is at REMOTE what is the contact energize OC when push button open is pushed?
CR1
OR1
CC1
SRI
Refer to the RotorK MOV Figure 6, The selector is at REMOTE what is the contact
De-energize OC and CC when push button Stop is pushed?
CR1
OR1
CC1
SRI
1. In Test Figure 6, the valve is Open. The selector is at REMOTE. The valve did not Close when the close push button is pushed. Where is the fault located?
Voltages reading are:
Terminal 5 and 42 – 0 volt Terminal 4 and 27 – 0 volt
Terminal 4 and 35 – 120 volts
Open between terminal 42 and CT/LS
Open between terminal 35 and 27
Open between terminal OC1 and CT/LS
Open between terminal 35 and 42
