MCQs 60 Flashcards
——- is one of the oldest and simplest form of cannon
Mortar
Its ——- enables the projectiles to clear high ground and mountain tops
High angle of fire
There is a need for such a weapon where ——— fail to destroy the enemy, so mortars are the only weapons which are effective in such areas
Flat trajectory weapons
To obtain effective fire on the targets and to get the best use out of this weapon, it is essential that, the commanders understand its ———, —— and ——— thoroughly
Characteristics, capabilities and limitations
The elevation of the barrel varies between ——- at maximum range and ———- at minimum.
45 degrees, 80 degrees
The high angle of elevation enables its bombs to achieve a high angle of ——— and ———
Ascent and descent
The vertex height of of its trajectory varies between —— and —- at charge 0, —— and —— at charge 1, —— and —— at charge 2
225 meters, 115 meters, 364 meters, 186 meters, 785 meters, 421 meters
It can be sited and brought into action from behind high cover, where it will be safe from the ———-
Enemy’s small arms fire
It can engage targets on reverse slopes, dead ground, ——— etcetera, where the —— are ineffective
Deep nullahs, low trajectory weapons
It is a light weapon and is carried by ———-
One man
The ——— is carried by the other ———- of its crew
First line pouch ammunition, two members
It has on weapon ——- and ——— in reserve
30 bombs, 30 bombs
It can be taken across across any ——- and ——- and can support the company in all types of operations
Type of terrain, obstacles
Due to ——— and flash produced while firing. It can be easily detected by the enemy if it is not sited behind ——- or in low ground
Distinct sound, cover
Moreover mortars can easily be located by ——- and ——— equipment, even if sited behind cover, so these are always liable to counter me
Radar, sound ranging
The mortar can fire ———- without aiming
15-20 round per minute
Mortars can be given any direction by ———-
Moving the bipod
Without moving the bipod ——- left and right traverse can be achieved through the ———
200 mils, traversing gear
It bursts into numerous ——-, it has a killing area of —— and danger area of ——— all round
Small fragments, 15 meters, 100 meters
Effective fire can be brought down on targets which have been ——, during night, fog or ———. The mortars can also engage ——- at night
Pre registered, smoke, new targets
It is very accurate weapon thus it does not have much of ———. The weapon can even destroy ——- targets effectively
Dispersion zone, point targets
If the ———- is not coordinated with the barrel and apart from many other factors like wind, ammunition and ——— to the target, the first bomb may not fall on the target, therefore we can adjust the ———, so that the subsequent bombs land on the target through the process of range
Mortar sight, wrong estimation of range, elevation
As the time of flight of the bomb varies between ———— for different ranges and charges
10 and 25 seconds
The wind will have an appreciable effect on the path of the bomb, where the time of flight is more than ———
15 seconds
The mortar can fire at a minimum range of ——— and at maximum range of ———-
153 meters, 1494 meters
This is a high trajectory weapon and is simple to fire. Its maximum range is ———- (—-)
1494 meters, 1614 yards
Pull the barrel catch in the —— upto the barrel catch stop with the ——- and thumb of the ——- hand
Clockwise direction, forefinger, right hand
With the left hand hold the barrel from the ——— and separate the barrel from the ——-
Hand grip, base plate
It has a ——- which is kept in the sight box, when not in use
Detachable sight
It consists of a body and ——- sight
Collimeter
Hold the bipod assembly from the ———- with left hand and barrel from the ——— with the right hand
Shock absorber, hand grip
Push the barrel forward and fit it in the ——- so that the shock absorber fits around the ———-
Clamping bracket, hand grip post
Fit the ——- of the barrel in its socket in the base plate and push the barrel catch forward and ensure the barrel is properly locked in the ——
Spherical projection, base plate
Some parts of ——— needed for replacement and others required for cleaning are earned in a bag
60 millimeter mortar
Fit the ‘L’ type spanner on the —— and rotate it —— and remove it
Firing pin, anti clockwise
By using the ——- with any suitable material, the bore will be thoroughly dried and inspected
Cleaning rod
By looking through the barrel, if a shadow ring is found anywhere on the inner surface, it is a ———
Dent
If the depth of the dent exceeds ——- the barrel should not be used
0.4 millimeter
For checking ——- put a ruler along the surface of the barrel
Expansion
If at any place a space between the barrel and the ruler is found it means the barrel has ——-
Expanded
It is difficult to detect a ——. If a —— is suspected anywhere on the upper surface, rub off the paint and examine it carefully
Crack, crack
—— will be dried and examined to ensure that firing pin is correctly positioned
Breech piece
When the barrel is locked into the base plate socket, the rounded portion of the spherical projection should be under the ——— and ———
Barrel catch, socket collar
The spherical projection, socket and under side of the ——- will be cleaned
Base plate
The ———, should be examined for distortion
Base plate
The barrel should be locked in the ———— to ensure that the barrel catch is functioning correctly
Spherical projection socket
Check traversing mechanism for any play which may exist because of wearing out of the ——— and tube
Traversing rod
Prepare a solution of ——- and ——- and wash the barrel
Hot water, washing soap
Wrap a piece of ——- round the head of the cleaning rod to clean the ———
Garnish, bore
When cleaned the barrel and its attachments will be inspected for for any ——- and —-
Defects and losses
It will be greased and stored with ——— on
Muzzle cover
Deflection scale is graduated up to ——- right and ——— left
200 mils, 200 mils
The graduations marked in —— represent deflection towards the right and those marked in ——— represent deflection towards the left
White, red
Each graduation represents ——-
2 mils
For applying deflection to the left, rotate the deflection knob in the ——— till the required graduation marked in red coincides with the index line
Clockwise direction
For applying deflection to the right, rotate the deflection in ——— till the required graduation marked in white coincides of with the index line
Anti clockwise direction
Major scale has ——- and each graduation is further divided into —— which are represented on the micrometer scale
11 graduations, 100 parts
Each graduation on the micrometer scale represents ——-
5 parts
To increase the elevation, rotate the elevation knob in the ——and to reduce it rotate it in the ———
Clockwise direction, anti clockwise direction
Do not keep the eye at a distance from the ———-
Rubber eye shield
Lower or elevate the ——- as required
Collimator light
After the elevation has been set, number 1 brings the ——- in the centre by using the ———-
Elevation bubble, elevation handle
While using the major scale, the ——- should be at zero
Elevation micrometer scale
The eyes should be in line with the ——- while setting elevation on major scale
Index line
Increase in range will depress the ——-
Barrel
The given deflection is set on the sight, and after the mortar is laid for elevation, number 1 looks through the collimator sight to see if it is on the ———-
Aiming point
If there is a little variation it is adjusted by operating the ——-
Traversing handle
Finally ——- checks that both the bubbles are in the centre
Number 1
During ——— it may not be possible to relay the mortar after every bomb fired from the mortar
Rapid fire
If the target is not visible then lay the mortar on the ———- which is in line with the target
Aiming post
Container contains two cells of ——- each
1.5 volts
Small size torch is used to light up the ——— so that sight can be set
Sight graduations
Place the aiming lamp fixed on the aiming post at a distance of ——— from the mortar
5 meters
Record the deflection to other targets which are ———— right and left to the target on which the mortar is laid
200 mils
During firing the ———- should be kept lighted otherwise it should be switched off
Aiming lamp
If the aiming does not function a ——— may be fixed at the post on the ——
Dry cell battery, aiming line
Sight is tested correctly relate the ——- and impact so that the bomb falls at the range and ——- set on sight
Points of aim, deflection
Set the clinometer for maximum range i.e ———
45 degrees
Sight is correct, if the —— is at zero and the index line is at —- on the elevation major scale
Elevation micro meter scale, 10
In case of any difference take ——— readings and work out their average
Three concurrent
Loosen the ———— so that the micrometer scale becomes free
Elevation knob screw
If there is major difference, then adjust the ———- by loosening the screws
Major scale plate
With the help of supports, position the plumb line ——— meters or ——— yards behind the mortar position and the inspection target ——— feet or ——— meters from the object lens of the sight
3 to 5, 3 to 5, 32.5, 9.907
Select an aiming point at least ——- meters (——- yards) away
200, 218.75
——- is the simplest apparatus to calculate the elevation and charge for range between ——— to ——— meters
Shamaila dial, 150 meters, 2075
60 millimeter mortar shamaila dial is dial shaped which has ——- written on it
Firing table
The front side of the dial is used if the range is ——— or less
1000 meters
The rear side of the dial is used for ranges between ——- meters and ——- meters
1050, 2075
———— for various ranges are inscribed in different colours for easy differentiation
Firing tables
It is a ———- dial having diameter of —- with a rotating , transparent pointer ( hairline)
Circular plastic, 6 centimeter
The range table is composed according to the ———- law of ——- and to the combination of service practice and theoretical calculation
Air resistance, 1943
The allowance given at the top of the range table suits any firing range below ———- above sea level
5000 meters
When gun emplacement altitude is not at zero use the column of sight allowance of altitude of —— above sea level to make corrections of the sight
1000 meters
Full name of the shell: model 1963,
60mm mortar semi- Steel Cast Iron Anti-Personnel Shell
