Power Engineering - 4B Ultra B Questions With Complete
Solutions
Corrugations in outside aluminum storm water piping are
required to:
a. Permit expansion of the aluminum
b. Allow flexibility to prevent wind damage
c. Decrease potential for blockage
d. Increase the flow of storm water
a. Permit expansion of the aluminum
Occupancy sensors:
a. Are best suited where fluorescent lights are frequently turned
on and off
b. Sense heat to turn a lighting circuit on
c. Are automatic switches
d. Use timers for occupancy programming
c. Are automatic switches
Occupancy sensors typically use _________ for activation.
a. Proximity sensors
b. Ultrasonic energy
c. Ultraviolet energy
d. Loud sounds
b. Ultrasonic energy
,The first step when repairing a faucet is:
a. Tigten the faucet with a wrench
b. Remove the washer from the end of the spindle.
c. Unscrew the packing nut and remove the spindle.
d. Shut off the water at the nearest isolation valve.
e. Make sure the pilot washer is intact
d. Shut off the water at the nearest isolation valve.
Most dimmer switches sold today:
a. Control lighting levels in response to changing levels of
daylight.
b. Are solid state devices
c. Can be used with both incandescent or fluorescent lighting
d. Divert some current through a variable resistor
b. Are solid state devices
One of the three main types of illumination is:
a. High intensity lighting
b. General (uniform) lighting
c. Ambient lighting
d. Emergency lighting
b. General (uniform) lighting
Temperature relief devices are effective in protecting domestic
hot water systems from:
,a. Inadequate heating of the water
b. Venting off air released from water during heating
c. Flashing of water to steam when faucets are opened
d. Scale build up in the system
c. Flashing of water to steam when faucets are opened
Building drainage systems
a. use a single pipe for waste, venting, and storm water
b. are vented to keep fluid from being drawn out of the traps
c. have vent stacks that keep sewer gas from venting through the
roof.
d. have branch lines connected to the waste stack with 90°
fittings.
b. are vented to keep fluid from being drawn out of the traps
In large buildings, approximately what percentage of the
electrical load is lighting?
a. 0.2
b. 0.7
c. 0.4
d. 0.6
d. 0.6
Resistance type light dimmer switches:
a. don't save energy
b. are used in HID lights
, c. use 12 volt control systems
d. can be used as emergency light switches
e. reduce energy consumption by up to 40%
a. don't save energy
Efficacy of light sources is expressed in:
a. Watts / second
b. lumens / second
c. Joules / second
d. Joules / Watt
e. lumens / Watt
e. lumens / Watt
In an indirect hot water heater which uses steam and a self-
powered temperature regulating valve, what increases the
regulated temperature?
a. the compression on the valve spring must be increased
b. the compression of the valve spring must be decreased
c. the length of the capillary tube must be decreased
d. the length of the capillary tube and the compression of the
spring must both be increased
e. the length of the capillary tube must be increased
a. the compression on the valve spring must be increased
Two ways to feed water throughout a building are
a. Forced and induced
Solutions
Corrugations in outside aluminum storm water piping are
required to:
a. Permit expansion of the aluminum
b. Allow flexibility to prevent wind damage
c. Decrease potential for blockage
d. Increase the flow of storm water
a. Permit expansion of the aluminum
Occupancy sensors:
a. Are best suited where fluorescent lights are frequently turned
on and off
b. Sense heat to turn a lighting circuit on
c. Are automatic switches
d. Use timers for occupancy programming
c. Are automatic switches
Occupancy sensors typically use _________ for activation.
a. Proximity sensors
b. Ultrasonic energy
c. Ultraviolet energy
d. Loud sounds
b. Ultrasonic energy
,The first step when repairing a faucet is:
a. Tigten the faucet with a wrench
b. Remove the washer from the end of the spindle.
c. Unscrew the packing nut and remove the spindle.
d. Shut off the water at the nearest isolation valve.
e. Make sure the pilot washer is intact
d. Shut off the water at the nearest isolation valve.
Most dimmer switches sold today:
a. Control lighting levels in response to changing levels of
daylight.
b. Are solid state devices
c. Can be used with both incandescent or fluorescent lighting
d. Divert some current through a variable resistor
b. Are solid state devices
One of the three main types of illumination is:
a. High intensity lighting
b. General (uniform) lighting
c. Ambient lighting
d. Emergency lighting
b. General (uniform) lighting
Temperature relief devices are effective in protecting domestic
hot water systems from:
,a. Inadequate heating of the water
b. Venting off air released from water during heating
c. Flashing of water to steam when faucets are opened
d. Scale build up in the system
c. Flashing of water to steam when faucets are opened
Building drainage systems
a. use a single pipe for waste, venting, and storm water
b. are vented to keep fluid from being drawn out of the traps
c. have vent stacks that keep sewer gas from venting through the
roof.
d. have branch lines connected to the waste stack with 90°
fittings.
b. are vented to keep fluid from being drawn out of the traps
In large buildings, approximately what percentage of the
electrical load is lighting?
a. 0.2
b. 0.7
c. 0.4
d. 0.6
d. 0.6
Resistance type light dimmer switches:
a. don't save energy
b. are used in HID lights
, c. use 12 volt control systems
d. can be used as emergency light switches
e. reduce energy consumption by up to 40%
a. don't save energy
Efficacy of light sources is expressed in:
a. Watts / second
b. lumens / second
c. Joules / second
d. Joules / Watt
e. lumens / Watt
e. lumens / Watt
In an indirect hot water heater which uses steam and a self-
powered temperature regulating valve, what increases the
regulated temperature?
a. the compression on the valve spring must be increased
b. the compression of the valve spring must be decreased
c. the length of the capillary tube must be decreased
d. the length of the capillary tube and the compression of the
spring must both be increased
e. the length of the capillary tube must be increased
a. the compression on the valve spring must be increased
Two ways to feed water throughout a building are
a. Forced and induced
