Ramsay Maintenance Test Study
Guide MRA Actual Exam Questions
With Reviewed 100% Correct
Detailed Answers & Explanation
Guaranteed Pass!!
1. A pilot flame detector can be a
A. solenoid.
B. flame rod.
C. regulator.
D. pressure gauge. - ANSWER B. flame rod.
2. Combustion air is normally preheated by using which one of the following?
A. Recuperator
B. Atomizer
C. Premixer
D. Dampers - ANSWER C. Premixer
3. As flow increases across an orifice plate, the differential pressure developed
A. decreases logarithmically.
B. increases linearly.
,C. increases as a square function.
D. remains constant. - ANSWER C. increases as a square function.
4. All fires require a source of
A. hydrogen.
B. oxygen.
C. nitrogen.
D. heat. - ANSWER D. heat.
5. Perfect combustion will take place when the right amount of fuel is combined
with what gas?
A. Carbon
B. Oxygen
C. Hydrogen
D. Nitrogen - ANSWER B. Oxygen
6. How many BTU's are there in a therm of natural gas?
A. 97,560
B. 100,000
C. 97,560,976
D. 102,500,000 - ANSWER B. 100,000
,7. The quantity of heat necessary to raise one pound of water one degree
Fahrenheit is
A. a calorie.
B. a BTU.
C. a therm.
D. Celsius. - ANSWER B. a BTU.
8. A synchronous motor controller will start the motor as an induction motor and
then
A. bring it into synchronization using DC excitation.
B. run it as a synchronized DC motor.
C. synchronize the stator with the line frequency.
D. synchronize the power factor and frequency. - ANSWER D. synchronize the
power factor and frequency.
9. A wound-rotor motor is always started with
A. no external resistance in the rotor circuit
B. a starting or auxiliary winding.
C. all the external resistance in the rotor circuit.
D. any external resistances open-circuited. - ANSWER C. all the external
resistance in the rotor circuit.
10. Dynamic braking is used to
A. regulate the speed of a motor.
, B. mechanically slow the motor down.
C. electrically retard or stop a motor.
D. derate a motor's horsepower. - ANSWER C. electrically retard or stop a
motor.
11. What causes the current to decrease as an induction motor accelerates?
A. Internal resistance
B. External resistance
C. Stator winding
D. Counter EMF - ANSWER D. Counter EMF
12. The formula for determining the synchronous speed of the rotating magnetic
field around the stator is
A. N=120fP
B. N=120P:f
C. N=Pf:120
D. N=120f:P - ANSWER D. N=120f:P
13. The main contacts of a reversing starter are connected such that two line
wires, of the three feeding the motor, are
A. open when forward contacts close.
B. interchanged when reversed contacts close.
C. shorted for plugging.
D. closed for jogging. - ANSWER B. interchanged when reversed contacts close.
Guide MRA Actual Exam Questions
With Reviewed 100% Correct
Detailed Answers & Explanation
Guaranteed Pass!!
1. A pilot flame detector can be a
A. solenoid.
B. flame rod.
C. regulator.
D. pressure gauge. - ANSWER B. flame rod.
2. Combustion air is normally preheated by using which one of the following?
A. Recuperator
B. Atomizer
C. Premixer
D. Dampers - ANSWER C. Premixer
3. As flow increases across an orifice plate, the differential pressure developed
A. decreases logarithmically.
B. increases linearly.
,C. increases as a square function.
D. remains constant. - ANSWER C. increases as a square function.
4. All fires require a source of
A. hydrogen.
B. oxygen.
C. nitrogen.
D. heat. - ANSWER D. heat.
5. Perfect combustion will take place when the right amount of fuel is combined
with what gas?
A. Carbon
B. Oxygen
C. Hydrogen
D. Nitrogen - ANSWER B. Oxygen
6. How many BTU's are there in a therm of natural gas?
A. 97,560
B. 100,000
C. 97,560,976
D. 102,500,000 - ANSWER B. 100,000
,7. The quantity of heat necessary to raise one pound of water one degree
Fahrenheit is
A. a calorie.
B. a BTU.
C. a therm.
D. Celsius. - ANSWER B. a BTU.
8. A synchronous motor controller will start the motor as an induction motor and
then
A. bring it into synchronization using DC excitation.
B. run it as a synchronized DC motor.
C. synchronize the stator with the line frequency.
D. synchronize the power factor and frequency. - ANSWER D. synchronize the
power factor and frequency.
9. A wound-rotor motor is always started with
A. no external resistance in the rotor circuit
B. a starting or auxiliary winding.
C. all the external resistance in the rotor circuit.
D. any external resistances open-circuited. - ANSWER C. all the external
resistance in the rotor circuit.
10. Dynamic braking is used to
A. regulate the speed of a motor.
, B. mechanically slow the motor down.
C. electrically retard or stop a motor.
D. derate a motor's horsepower. - ANSWER C. electrically retard or stop a
motor.
11. What causes the current to decrease as an induction motor accelerates?
A. Internal resistance
B. External resistance
C. Stator winding
D. Counter EMF - ANSWER D. Counter EMF
12. The formula for determining the synchronous speed of the rotating magnetic
field around the stator is
A. N=120fP
B. N=120P:f
C. N=Pf:120
D. N=120f:P - ANSWER D. N=120f:P
13. The main contacts of a reversing starter are connected such that two line
wires, of the three feeding the motor, are
A. open when forward contacts close.
B. interchanged when reversed contacts close.
C. shorted for plugging.
D. closed for jogging. - ANSWER B. interchanged when reversed contacts close.
