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Objective Questions

Latest RMC Driver Operator Exam Question (Objective Questions), MCQ in English

Subjects : Technical Knowledge, General Awareness & Awareness, Elementary Mathematics, English Language

Question Bank RMC Driver Operator (Pump) Exam - English
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Technical Knowledge

Question 1Single Answer
A centrifugal fire pump converts mechanical energy primarily into which form?
  1. A
    Pressure energy of water
  2. B
    Electrical energy
  3. C
    Thermal energy
  4. D
    Chemical energy
Question 2Single Answer
The main principle of a centrifugal pump is based on?
  1. A
    Positive displacement
  2. B
    Centrifugal force
  3. C
    Bernoulli’s theorem
  4. D
    Pascal’s law
Question 3Single Answer
In a centrifugal pump, water enters the impeller through the?
  1. A
    Volute
  2. B
    Eye of the impeller
  3. C
    Discharge outlet
  4. D
    Pump casing
Question 4Single Answer
The velocity of water is highest at which point of the impeller?
  1. A
    Eye
  2. B
    Center shaft
  3. C
    Suction inlet
  4. D
    Impeller vanes outlet
Question 5Single Answer
Conversion of velocity energy into pressure energy occurs mainly in the?
  1. A
    Suction hose
  2. B
    Impeller eye
  3. C
    Volute casing
  4. D
    Primer
Question 6Single Answer
The impeller in fire pumps is usually made of?
  1. A
    Bronze or alloy metal
  2. B
    Plastic
  3. C
    Rubber
  4. D
    Wood
Question 7Single Answer
Which component prevents water leakage along the pump shaft?
  1. A
    Volute
  2. B
    Intake valve
  3. C
    Primer
  4. D
    Packing or mechanical seal
Question 8Single Answer
The function of the pump casing is to?
  1. A
    Increase RPM
  2. B
    Support the engine
  3. C
    Hold water under pressure
  4. D
    Cool the impeller
Question 9Single Answer
Which type of casing gradually increases in area to reduce velocity?
  1. A
    Spiral volute casing
  2. B
    Diffuser casing
  3. C
    Parallel casing
  4. D
    Straight casing
Question 10Single Answer
Wear rings are provided in centrifugal pumps to?
  1. A
    Increase pressure
  2. B
    Reduce friction losses
  3. C
    Improve priming
  4. D
    Prevent metal-to-metal contact
Question 11Single Answer
Priming of a centrifugal pump means?
  1. A
    Increasing pressure
  2. B
    Cooling the pump
  3. C
    Filling discharge hose
  4. D
    Removing air from pump and suction line
Question 12Single Answer
Centrifugal pumps cannot pump air because?
  1. A
    Air does not create centrifugal force
  2. B
    Air is heavier than water
  3. C
    Air damages impeller
  4. D
    Air blocks discharge
Question 13Single Answer
Which primer uses engine exhaust gases to create vacuum?
  1. A
    Water ring primer
  2. B
    Exhaust primer
  3. C
    Reciprocating primer
  4. D
    Rotary primer
Question 14Single Answer
Exhaust primers are commonly used in?
  1. A
    Portable pumps
  2. B
    Electric pumps
  3. C
    Older fire appliances
  4. D
    Submersible pumps
Question 15Single Answer
Water ring primer operates on the principle of?
  1. A
    Piston action
  2. B
    Venturi effect
  3. C
    Rotating water seal
  4. D
    Exhaust suction
Question 16Single Answer
Water ring primer requires which medium to operate?
  1. A
    Water
  2. B
    Oil
  3. C
    Air only
  4. D
    Fuel
Question 17Single Answer
Reciprocating primer works using?
  1. A
    Piston and cylinder motion
  2. B
    Continuous rotation
  3. C
    Exhaust gases
  4. D
    Water circulation
Question 18Single Answer
A failed primer will result in?
  1. A
    Overpressure
  2. B
    No suction lift
  3. C
    High discharge pressure
  4. D
    Pump cavitation only
Question 19Single Answer
Maximum theoretical suction lift at sea level is approximately?
  1. A
    5 m
  2. B
    7 m
  3. C
    15 m
  4. D
    10.3 m
Question 20Single Answer
Practical suction lift in fire service operations is limited to about?
  1. A
    2 m
  2. B
    7 m
  3. C
    5 m
  4. D
    10 m
Question 21Single Answer
Cavitation in a fire pump is caused by?
  1. A
    High discharge pressure
  2. B
    Low intake pressure
  3. C
    Excessive lubrication
  4. D
    Blocked discharge
Question 22Single Answer
Cavitation results in which symptom?
  1. A
    Smooth operation
  2. B
    Loud knocking noise
  3. C
    Increased pressure
  4. D
    Better efficiency
Question 23Single Answer
Cavitation damages which component most?
  1. A
    Suction hose
  2. B
    Pressure gauge
  3. C
    Volute casing
  4. D
    Impeller
Question 24Single Answer
To prevent cavitation, the operator should?
  1. A
    Increase RPM
  2. B
    Increase suction lift
  3. C
    Reduce discharge flow
  4. D
    Close intake valve
Question 25Single Answer
Net Positive Suction Head (NPSH) relates to?
  1. A
    Available suction pressure
  2. B
    Pump efficiency
  3. C
    Discharge pressure
  4. D
    Hose diameter
Question 26Single Answer
Fire pumps are generally rated at?
  1. A
    Rated capacity and pressure
  2. B
    Maximum pressure
  3. C
    Zero pressure
  4. D
    Idle speed
Question 27Single Answer
Increasing discharge pressure beyond rated capacity will cause flow to?
  1. A
    Increase
  2. B
    Decrease
  3. C
    Remain constant
  4. D
    Become zero immediately
Question 28Single Answer
Pump efficiency is highest near?
  1. A
    Rated capacity
  2. B
    Maximum RPM
  3. C
    Shut-off pressure
  4. D
    Zero flow
Question 29Single Answer
A pressure relief valve on a fire pump prevents?
  1. A
    Over-pressurization
  2. B
    Engine stalling
  3. C
    Water hammer
  4. D
    Hose kinks
Question 30Single Answer
Pump pressure gauges measure pressure in units of?
  1. A
    LPM
  2. B
    kW
  3. C
    RPM
  4. D
    Bar or PSI
Question 31Single Answer
PTO transfers power from?
  1. A
    Battery to pump
  2. B
    Alternator to pump
  3. C
    Pump to wheels
  4. D
    Engine to pump
Question 32Single Answer
PTO is generally mounted on the?
  1. A
    Gearbox or transmission
  2. B
    Radiator
  3. C
    Axle
  4. D
    Fuel tank
Question 33Single Answer
Before engaging PTO, the vehicle should be?
  1. A
    In neutral with parking brake applied
  2. B
    In high gear
  3. C
    Moving slowly
  4. D
    Engine switched off
Question 34Single Answer
Engaging PTO while vehicle is moving can cause?
  1. A
    Better pump output
  2. B
    Smooth engagement
  3. C
    Severe mechanical damage
  4. D
    Lower RPM
Question 35Single Answer
PTO engagement usually requires?
  1. A
    Clutch operation
  2. B
    Accelerator pressed fully
  3. C
    Brake released
  4. D
    Steering lock
Question 36Single Answer
Indicator light for PTO engagement shows?
  1. A
    PTO engaged
  2. B
    Pump primed
  3. C
    Engine overheating
  4. D
    Low fuel
Question 37Single Answer
Disengaging PTO should be done when?
  1. A
    Throttle returned to idle
  2. B
    Throttle fully open
  3. C
    Pump is under full pressure
  4. D
    Vehicle in gear
Question 38Single Answer
Failure to disengage PTO before driving can result in?
  1. A
    Pump damage
  2. B
    Improved performance
  3. C
    Better cooling
  4. D
    Fuel saving
Question 39Single Answer
PTO noise during operation may indicate?
  1. A
    Proper engagement
  2. B
    Gear misalignment or wear
  3. C
    Low water level
  4. D
    High pressure
Question 40Single Answer
PTO lubrication is usually shared with?
  1. A
    Engine oil
  2. B
    Transmission oil
  3. C
    Water tank
  4. D
    Fuel system
Question 41Single Answer
Drafting refers to drawing water from?
  1. A
    Static source
  2. B
    Elevated tank
  3. C
    Pressurized main
  4. D
    Booster tank only
Question 42Single Answer
Examples of static water sources include?
  1. A
    Ponds and rivers
  2. B
    Overhead tanks
  3. C
    Hydrants
  4. D
    Pump outlets
Question 43Single Answer
During drafting, the suction hose must be?
  1. A
    Fully submerged and airtight
  2. B
    Partially submerged
  3. C
    Kept dry
  4. D
    Flexible only
Question 44Single Answer
Air leakage in suction hose will cause?
  1. A
    Higher pressure
  2. B
    Loss of prime
  3. C
    Better flow
  4. D
    No effect
Question 45Single Answer
Suction strainer is used to?
  1. A
    Prevent debris entry
  2. B
    Increase pressure
  3. C
    Measure flow
  4. D
    Reduce friction
Question 46Single Answer
Before drafting, the pump should be?
  1. A
    Dry
  2. B
    Primed
  3. C
    At full RPM
  4. D
    Disengaged
Question 47Single Answer
Maximum number of suction hose lengths should be?
  1. A
    As many as possible
  2. B
    Based on discharge pressure
  3. C
    Limited to reduce friction loss
  4. D
    Ignored
Question 48Single Answer
Hard suction hoses are preferred because they?
  1. A
    Collapse easily
  2. B
    Are lighter
  3. C
    Increase turbulence
  4. D
    Resist vacuum collapse
Question 49Single Answer
Drafting time increases with?
  1. A
    Increased suction lift
  2. B
    Lower RPM
  3. C
    Smaller discharge lines
  4. D
    Closed discharge
Question 50Single Answer
During drafting, discharge valves should be?
  1. A
    Fully open
  2. B
    Slightly cracked after prime
  3. C
    Removed
  4. D
    Closed initially
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