BXMO EXAM AND PRACTICE EXAM NEWEST 2026 TEST
BANK| BASIC X-RAY MACHINE OPERATOR
CERTIFICATION EXAM PREP WITH COMPLETE 400 REAL
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (BRAND NEW!!)
1. The boxlike device attached under the tube housing that
allows the limited operator to vary the size of the radiation
field is called the:
A. Collimator
B. Bucky
C. Grid
D. Filter
Correct Answer: A
Rationale: The collimator is attached below the x-ray tube
housing and contains adjustable lead shutters that allow the
operator to control the size and shape of the radiation field,
reducing patient exposure and improving image quality .
2. An invisible line in the center of the x-ray beam and
perpendicular to the long axis of the x-ray tube is called the:
1
,A. Central axis
B. Transverse line
C. Central ray
D. Sagittal line
Correct Answer: C
Rationale: The central ray is the imaginary line in the center of
the x-ray beam that is perpendicular to the long axis of the x-
ray tube. It is used to center the beam to the image receptor and
patient anatomy .
3. An exposure time of 0.02 seconds is equal to how many
milliseconds?
A. 200 msec
B. 2 msec
C. 2000 msec
D. 20 msec
Correct Answer: D
Rationale: 0.02 seconds × 1000 milliseconds/second = 20
milliseconds. This conversion is critical for timing accuracy in
radiographic exposures .
2
,4. The number 9 squared is equal to:
A. 18
B. 27
C. 81
D. 90
Correct Answer: C
Rationale: 9 squared means 9 × 9 = 81. Basic mathematical
operations are essential for calculating exposure factors and
technique adjustments .
5. The number 4 is the square root of:
A. 2
B. 8
C. 16
D. 12
Correct Answer: C
Rationale: Since 4 × 4 = 16, the square root of 16 is 4.
Understanding square roots is important for magnification
calculations and technique adjustments .
3
, 6. When 62 kVp is increased by 30%, the result is
approximately:
A. 80 kVp
B. 62 kVp
C. 90 kVp
D. 81 kVp
Correct Answer: D
Rationale: 30% of 62 is 18.6; 62 + 18.6 = 80.6, approximately
81 kVp. This type of calculation is used when adjusting technique
for patient size variations .
7. When the fraction 7/8 is converted to a decimal, the result
is:
A. 0.875
B. 0.700
C. 0.800
D. 0.750
Correct Answer: A
Rationale: 7 divided by 8 equals 0.875. Understanding fraction-
to-decimal conversion is important for calculating exposure
factors and mAs values.
4
BANK| BASIC X-RAY MACHINE OPERATOR
CERTIFICATION EXAM PREP WITH COMPLETE 400 REAL
EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS/
ALREADY GRADED A+ (BRAND NEW!!)
1. The boxlike device attached under the tube housing that
allows the limited operator to vary the size of the radiation
field is called the:
A. Collimator
B. Bucky
C. Grid
D. Filter
Correct Answer: A
Rationale: The collimator is attached below the x-ray tube
housing and contains adjustable lead shutters that allow the
operator to control the size and shape of the radiation field,
reducing patient exposure and improving image quality .
2. An invisible line in the center of the x-ray beam and
perpendicular to the long axis of the x-ray tube is called the:
1
,A. Central axis
B. Transverse line
C. Central ray
D. Sagittal line
Correct Answer: C
Rationale: The central ray is the imaginary line in the center of
the x-ray beam that is perpendicular to the long axis of the x-
ray tube. It is used to center the beam to the image receptor and
patient anatomy .
3. An exposure time of 0.02 seconds is equal to how many
milliseconds?
A. 200 msec
B. 2 msec
C. 2000 msec
D. 20 msec
Correct Answer: D
Rationale: 0.02 seconds × 1000 milliseconds/second = 20
milliseconds. This conversion is critical for timing accuracy in
radiographic exposures .
2
,4. The number 9 squared is equal to:
A. 18
B. 27
C. 81
D. 90
Correct Answer: C
Rationale: 9 squared means 9 × 9 = 81. Basic mathematical
operations are essential for calculating exposure factors and
technique adjustments .
5. The number 4 is the square root of:
A. 2
B. 8
C. 16
D. 12
Correct Answer: C
Rationale: Since 4 × 4 = 16, the square root of 16 is 4.
Understanding square roots is important for magnification
calculations and technique adjustments .
3
, 6. When 62 kVp is increased by 30%, the result is
approximately:
A. 80 kVp
B. 62 kVp
C. 90 kVp
D. 81 kVp
Correct Answer: D
Rationale: 30% of 62 is 18.6; 62 + 18.6 = 80.6, approximately
81 kVp. This type of calculation is used when adjusting technique
for patient size variations .
7. When the fraction 7/8 is converted to a decimal, the result
is:
A. 0.875
B. 0.700
C. 0.800
D. 0.750
Correct Answer: A
Rationale: 7 divided by 8 equals 0.875. Understanding fraction-
to-decimal conversion is important for calculating exposure
factors and mAs values.
4
