STUDENTS SUCCESS
Revision Examination Tests
“Come all for this Greatness”
... 100% Correct Ans ...
BRMS600 EXAM 2024-2025 ACTUAL EXAM COMPLETE 200-
QUESTIONS AND CORRECT DETAILED ANSWERS
Quiz Why do we supply the x-ray unit with an AC power source?
Ans: Transformers only work with AC voltages.
Quiz What is voltage ripple and how does using a three-phase generator reduce it?
Ans: Variation in tube voltage. Three-phase reduces ripple.
Quiz Define single-phase and three-phase power.
Ans: Single-phase: single AC voltage. Three-phase: three AC voltages out of phase
by 120o.
Quiz Why is there a limit to the advantage offered by rotating anode tubes?
Ans: Target not taken out of beam long enough for cooling.
Quiz What are three disadvantages of using high-speed anode tubes?
Ans: Increased prep time, wear on bearings, and cost.
Quiz What is a thyristor?
Ans: A device that only allows current to flow in one direction.
Quiz How do thyristors work?
Ans: They need a positive signal on the control wire to conduct power.
Quiz How are thyristors used to control exposure time?
Ans: A negative signal is sent to stop the conducting thyristor at the end of its half
cycle.
, Quiz What happens after the thyristor stops conducting?
Ans: Power is terminated from the x-ray unit.
Quiz What is the response time of a primary switch with a 100 Hz mains supply?
Ans: 0.005 s.
Quiz How can we improve the response time of a primary switch?
Ans: Increase the frequency of the mains supply.
Quiz Why is it important to collimate carefully when using an AEC?
Ans: To keep scatter to a minimum.
Quiz What are the consequences of not collimating carefully when using an AEC?
Ans: The unit may stop too soon or take too long to shut down.
Quiz What needs to be covered by collimation when using an AEC?
Ans: The chamber.
Quiz What are the checks that must be performed if an improperly exposed
radiograph is obtained with an AEC before changing the density setting and
repeating the exposure?
Ans: Positioning of the patient, Chamber selection.
Quiz Are anode rating charts designed to protect personnel or equipment, and how
do they achieve this?
Ans: Equipment, allows operator or x-ray unit to determine if the next exposure is
"safe", protects tube from overheating.
Quiz Are thermal cut outs designed to protect personnel or equipment, and how do
they achieve this?
Ans: Equipment, switches off sections of the unit when a preset temperature is
reached, prevents overheating of the unit.
Quiz Is the time switch on LBD designed to protect personnel or equipment, and how
does it achieve this?
Ans: Personnel, switches LBD off after a certain time, protects operator from heat
OR extends bulb life.
Quiz How does the tube design of a mammography unit differ from a general
radiography unit?
Revision Examination Tests
“Come all for this Greatness”
... 100% Correct Ans ...
BRMS600 EXAM 2024-2025 ACTUAL EXAM COMPLETE 200-
QUESTIONS AND CORRECT DETAILED ANSWERS
Quiz Why do we supply the x-ray unit with an AC power source?
Ans: Transformers only work with AC voltages.
Quiz What is voltage ripple and how does using a three-phase generator reduce it?
Ans: Variation in tube voltage. Three-phase reduces ripple.
Quiz Define single-phase and three-phase power.
Ans: Single-phase: single AC voltage. Three-phase: three AC voltages out of phase
by 120o.
Quiz Why is there a limit to the advantage offered by rotating anode tubes?
Ans: Target not taken out of beam long enough for cooling.
Quiz What are three disadvantages of using high-speed anode tubes?
Ans: Increased prep time, wear on bearings, and cost.
Quiz What is a thyristor?
Ans: A device that only allows current to flow in one direction.
Quiz How do thyristors work?
Ans: They need a positive signal on the control wire to conduct power.
Quiz How are thyristors used to control exposure time?
Ans: A negative signal is sent to stop the conducting thyristor at the end of its half
cycle.
, Quiz What happens after the thyristor stops conducting?
Ans: Power is terminated from the x-ray unit.
Quiz What is the response time of a primary switch with a 100 Hz mains supply?
Ans: 0.005 s.
Quiz How can we improve the response time of a primary switch?
Ans: Increase the frequency of the mains supply.
Quiz Why is it important to collimate carefully when using an AEC?
Ans: To keep scatter to a minimum.
Quiz What are the consequences of not collimating carefully when using an AEC?
Ans: The unit may stop too soon or take too long to shut down.
Quiz What needs to be covered by collimation when using an AEC?
Ans: The chamber.
Quiz What are the checks that must be performed if an improperly exposed
radiograph is obtained with an AEC before changing the density setting and
repeating the exposure?
Ans: Positioning of the patient, Chamber selection.
Quiz Are anode rating charts designed to protect personnel or equipment, and how
do they achieve this?
Ans: Equipment, allows operator or x-ray unit to determine if the next exposure is
"safe", protects tube from overheating.
Quiz Are thermal cut outs designed to protect personnel or equipment, and how do
they achieve this?
Ans: Equipment, switches off sections of the unit when a preset temperature is
reached, prevents overheating of the unit.
Quiz Is the time switch on LBD designed to protect personnel or equipment, and how
does it achieve this?
Ans: Personnel, switches LBD off after a certain time, protects operator from heat
OR extends bulb life.
Quiz How does the tube design of a mammography unit differ from a general
radiography unit?
